2016 Weather

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Annual Summary for 2016

2016 was a mild year, the mean 10.6C being +0.7deg above 30 year value.

Rainfall was 981.4mm, 128% of the 30 year value, statistically the 6th wettest year.
However, monthly rainfall varied a lot, Jan, Mar, June and Nov were wet (Jun especially so, having 75mm on the wettest day on record 16/6/2016), while May, July, Oct and Dec were dry). All these wet months rank amongst the top 20% of the months in 61 years here, and three of the dry months amongst the bottom 20%.

Analysis of temperatures and rainfall from 1956-2016 indicates these trends:

an increase in mean temp of 1.92degrees from 8.67C to 10.59C.
the number of air frosts has dropped, especially in the last decade, 
and snow days are becoming far less frequent.
an increase in annual rainfall of 13% from 726.9mm to 821.5mm.

greater extremes of rainfall have occurred within the last 5 years. with 2011 being the lowest recorded, while the following two 2012 and 2014 ranked highest, and 2013 was 4th highest.  2016 ranks 6th in annual rainfall, with June enjoying most monthly rainfall in any month and the wettest day of any day during 61 years, on 16th June.

 TEMPERATURE
14.6 mean max (C) , +0.7 diff from av (C)  9th highest
 6.6 mean min (C) ,    +0.7 diff from av (C)  8th= highest
10.6 mean (C),          +0.7 diff from av (C)  6th= highest

HiMax  34.1C on 9/7/16   6th Highest

RAINFALL 

981.4 rain total (mm), 128 % of av   6th highest (not as high as 2012/13/14)
186 raindays (with 0.2mm or more)
133 wetdays (with 1mm or more)
 57 verywetdays (with 5mm or more)  15th highest (not as high as 2008/12/13/14)

SNOWFALL
8 days with snow falling, 3 in Jan, 2 in Mar, 3 in Apr

1 days with 50% snow cover      1st= lowest

PRESSURE
1015.0 mean pressure (mb) , +0.5 pressure anomaly (mb)
1045.1 max pressure at any time of day, on 27/12/16  New record high 
970.6 min pressure at any time of day, on 28/3/16    13th = highest

FROSTS                     The last frost was 30/4/16 and the first frost 8/11/16

THUNDER                 9 days with thunder heard

HUMIDITY                    89.0% at 0900

CLOUD COVER            62.4% at 0900

 

January 2016 February 2016 March 2016

 

Overall mean temperatures were 0.9deg above average (16th highest in 61 years records here).  From 1st-10th means were about 2deg above normal, 11th-21st below normal, and 22nd-31st about 4deg above normal. The himax of 13.1C was the 8th highest on record.
Air frost on only 5 days (10th= fewest on record) but 18 days ground frost was normal.
Rainfall was 171% of normal, the 7th wettest on record.  The 25 rain days and 11 very wet days were both 2nd highest, while 18 wet days was 7th= highest.

Just a dusting of snowfall 14th-16th, totally 0.5cm but not lying at obs time.
Mean pressure 1005.4mb was 4th lowest for January.
Windiest days were 26th then 29th,  although very windy 25th-27th and 29th-31st.
Highest gusts estimated were 49mph on 26th, 46mph on 9th, 43mph on 29th .

 7.8 mean max (C) 
 2.3 mean min (C)
 5.0 mean (C)  +0.9 diff from av (C)
13.1 high max (C) on 24, 31
 2.8 low max (C) on 16
 8.7 high min (C) on 25
-3.9 low min (C) on 20

113.6 rain total (mm)
171% of av
25 raindays (>=0.2mm)
18 wetdays (>=1mm)
11 very wet days (>=5mm)

18 ground frost,

February started mild and very wet. It was mild 20th-21st, but cooler spells in the middle of the month and the end from 23rd.
Mean temp 4.8C was the 18th highest on record here, with anomaly +0.6deg.
The low max temp was 4.6C, the 6th highest.
21 days experienced a ground frost, equalling the 13th highest.

Rainfall in this normally driest month was 77.7mm, the 10th highest on record here. Nearly half of this, 35mm, fell in one day the 6th . Between 5th and 9th  54.2mm fell, while a further 15mm on 16-17th, accounting for most of the month’s total.
Many days with good sunny spells, especially 14th-16th, 18th-19th and 22nd-28th.
Highest wind gust recorded on 8th, estimated 53mph.

  8.2 mean max (C) 
  1.4 mean min (C) 
  4.8 mean (C)  +0.6 diff from av (C)
12.8 high max (C) on 21
  4.6 low max (C) on 13 
  8.0 high min (C) on 21 
 -3.9 low min (C) on 24

77.7 rain total (mm)
166 % of av 
12 raindays (days with >=0.2mm)
  9 wetdays (days with >=1mm)
  4 very wet days (days with >=5mm)

Ground frost on 21 days
Air frost on 9 days


Winter Stats

SEASONAL REPORT FOR WINTER  
Dec 2015, Jan 2016, Feb 2016

         this year  / normal /  anomaly

HiMax       14.0       17.2      17th highest

MeanMax     9.3      6.8       +2.5 
(new record high in 61 years, prev highest 9.1 in 1975)

LoMax        2.8     -6.0      4thhighest                                    
MEAN         6.4         4.0         +2.4 
(new record high, previous 6.3 in 1975)

HighMin    10.8      11.7     6th = highest

MeanMin    3.5        1.3        +2.2
(equals 3.5 highest recorded in 1975 and 2007)

LoMin        -3.9       -14.5     7th highest
(1st was –0.9 in 2014,  =5th was –3.7 in 2015, and =8th was –4.3 in 2013)

RAINFALL   306.7     197.6     155.2%
(4th= with 2013, the highest remains 430.6 in 2014)

Raindays    63        50.1     5th = highest
(1st is 71 in 2014)

Wet Days    48        35.8    4th = highest
(1st is 59 in 2014)

V Wet Days  25     14.3    2nd = with 2013
(1st is 39 in 2014)

Oktas             5.5          5.7
Bright Sun  161.5     161.0

The mildest winter on record in 61 years. Mean temp 6.4 (2.4deg above the 4.0C normal), mean max was 2.5deg above. and mean min 2.2deg above normal.
A wet winter having 155% of normal rainfall, following a drier autumn than normal.  It did not exceed the 430mm still held by 2014.

 

March had statistically near normal temperatures, but was very wet.

Mean temperatures were 0.6deg below average, cooler from 3rd to 10th, 18th, 21st and 28th to 30th. Milder from 11th to 17th, 25th to 27th and 30th to 31st.

 Rainfall was the 5th highest, only exceeded in 1979/80/81/82. Overnight periods 8th/9th and 27th/28th contributed 61mm of the month’s 101mm rainfall, ranking 47th highest daily rainfall of 32mm and 78th highest rainfall of 29mm respectively, in 22281 days (60 years).

More normal rain fell between 1st and 5th, and 25th to 30th. In fact, there were only 11 raindays, the 12th lowest in 60 years, but days it was very heavy.

Sunniest days were at the end of the month, 20th, 25th, 27th, 29th to 31st. Dullest days were 9th, 10th, 18th, 19th, 26th.
Windiest days were 1st, 2nd., 26th to 28th.

 9.8 mean max (C) 
 1.9 mean min (C) 
 5.9 mean (C)  -0.6 diff from av (C)
14.9 high max (C) on 31
 4.9 low max (C) on 4
 6.2 high min (C) on 26 
-3.0 low min (C) on 8

 

 

 

 

April 2016 May 2016 June 2016

April mean temperatures were 0.6deg below normal, but had 115% usual rainfall. Wet until 16th, then a dry period until further rain from 24th. 

Most notable was the changeability of 30th, frosty, bright and sunny start, but sudden heavy showers of rain/snow during the afternoon, although not settling for long.

   3.2 mean min (C) 
  8.1 mean (C)  -0.6 diff from av (C)

19.4 high max (C) on 13
  8.8 low max (C) on 15
  7.2 high min (C) on 14 
 -1.6 low min (C) on 28

   6 very wet days (>=5mm) 

13 ground frost 
  4 air frost 
55 cloud cover% 
88 mean RH%  

A mild month, having the 4th Highest daily mean 13.4C in 61 years here.
Warmest days were 8-9, coolest nights 1, 4 15.  

18.9 max (C) 
  8.0 min (C) 
13.4 mean(C)  +1.5 diff from av (C)
26.8 high max (C) on 8
12.1 low max (C) on 25 
12.4 high min (C) on 10
  2.2 low min (C) on 1

42.7 rain total (mm)
73.6 % of av 
14 raindays (days with >=0.2mm)
12 wetdays (days with >=1mm)
  3 very wet days (days with >=5mm)

Thunder heard on 1 day
Ground frost on 3 days
Air frost on 0 days

52% cloud cover percent
79% mean RH 

Spring Stats

SEASONAL REPORT FOR SPRING 
Mar 2016, Apr 2016, May 2016

         this year  / normal /  anomaly
HiMax               26.8        28.6

MeanMax         13.9        13.0      +0.9 
(14th= highest in 61 years)

LoMax                4.9       -0.6                           MEAN                  9.1         8.6       +0.5 
(21st highest)

HighMin            12.4      14.6      

MeanMin          4.4          4.3        +0.1

LoMin               -3.0     -11.1                             

RAINFALL        216.2      172.3    125.5%
(12th highest)

Raindays            44           43.1                
 
35th highest so quite normal

Wet Days            41          32.5              
12th highest

V Wet Days            15        11.4                     11th highest

Oktas                     4.5        5.4

Bright Sun            430.0     421.1

 Spring has been 0.5degC milder than normal, 21st highest in 61 years here.
Rainfall has been 125% of normal, 12th highest. 

41 wet days (many more than the normal 32.5) and 15 very wet days (more than the normal11.4) , although there were 44 raindays (normally 43, about normal).

 

Rainfall 221.2mm this month was not only a record for June, but of any month here since 1956, beating the previous record 204.9mm in Sept 1976.
Highest daily rainfall was 75.0mm on 16th, the wettest of any day since 1956, beating 74.9mm  on 19Aug1970.  Also 50.0mm fell on 14th and 39.2mm on 8th.
The aggregated rainfall this year for 6 months Jan to June is 628.7mm, 2nd only to 642.8mm in 2014.

Mean Temperature for June was 16.4C, the 5th mildest on record here, +1.6deg above normal.  Warmest days from 5th to 10th, coolest on 16th.
Most bright sunshine was 6th, then 3rd, 5th and 9th. least 10-12, 15-19 and 28-30.

Thunder was heard on four days, 7,8,14 and 16.
Windiest days were 20, 29, then 27,26,  making the end of the month particularly windy.

21.1 max (C) 
11.7 min (C) 
16.4 mean(C)  +1.6 diff from av (C)

27.9 high max (C) on 6,7
14.3 low max (C) on 1 
14.8 high min (C) on 8
  6.9 low min (C) on 3

221.2 rain total (mm)
363.8 % of av 
20 raindays (days with >=0.2mm)
12 wetdays (days with >=1mm)
  8 very wet days (days with >=5mm)

Thunder heard on 4 days, 7,8,14,16
Ground frost on 0 days
Air frost on 0 days

77% cloud cover percent
85% mean RH  

July 2016 August 2016 September 2016

July was a very dry month, having just 26.3mm rainfall, the 9th lowest in 61 years.
Rainfall was confined to 1st-2nd , 7th-13th , 15th-17th and 26th-29th.

Mean temperature was 0.7deg above normal, warmest 16th-24th.  
Plenty of pleasant mostly sunny days, notably 2nd-3rd, 8th and 17th -23rd, while dullest days were 7th, 15th, 16th.

22.5 max (C) 
12.6 min (C) 
17.6 mean(C)  +0.7 diff from av (C)
34.1 high max (C) on 19
15.3 low max (C) on 12 
21.1 high min (C) on 20
  6.1 low min (C) on 13

26.3 rain total (mm)
44.9 % of av 
12 raindays (days with >=0.2mm)
10 wetdays (days with >=1mm)
  1 very wet days (days with >=5mm)

61% cloud cover percent
82% mean RH  


Another mild month, the 7th mildest in 61 years records here.
Mean temperature exceeded 25C on 6th, 15th-18th, 23rd-24th, 30th
Rainfall was just below normal, rain on 1st but then a dry first half  turning wetter than usual in the second half 19th-20th and 24th-25th
Windiest days were 20th, 7th-8th.

22.6 mmax (C) 
12.8 mmin (C) 
17.7 mean(C)  +1.2 diff from av (C)
29.7 high max (C) on 23rd
18.0 low max (C) on 19th  
16.9 high min (C) on 7th
  8.9 low min (C) on 9th

62.1 rain total (mm)
93.7 % of av 
13 raindays (days with >=0.2mm)
 9 wetdays (days with >=1mm)
 5 very wet days (days with >=5mm)

Thunder heard on 27th
No Ground or Air frost 
59% cloud cover percent
87% mean RH 

Summer Stats

SEASONAL REPORT FOR SUMMER 
Jun 2016, Jul 2016, Aug 2016

               this year    normal    anomaly
HiMax              34.1      34.9
MeanMax        22.1       20.5       +1.6 
LoMax             14.3         9.2                     
MEAN              17.2       15.7       +1.5 
HighMin            21.1      21.5                            
MeanMin          12.4       10.8       +1.6
LoMin                 6.1       -1.1    
RAINFALL      309.6    197.1     157.1%
Raindays            45      40.6        +4.4
Wet Days            31      30.5       +0.5
V Wet Days        14      12.5        +1.5

Oktas                 5.3        5.4

Summer was 7th= mildest, after Spring 12th mildest and Winter the record mildest. Summer was the 3rd wettest, topped only in 2007 and 2012. Spring was 12th wettest, and Winter 4th wettest.

September was a warm month, with higher temperatures 1st-19th then normal 20th-30th . The mean temperature 16.3C was the 2nd highest on record here, beaten only by 17.4C in 2006. Mean max ranked 3rd highest, and mean min was a new record high ( equalling that of 2006). Max temperatures exceeded 23C on 6th-7th, and 12th-15th, and min temperatures exceeded 15C 7th-8th and 13th-14th.

Many bright sunny days, 9 having at least 6.5hrs bright sunshine, with 1st, 6th, 11th and 14th the best. Dullest were 3rd, 10th,19th and 26th each of which had rain.

Rainfall 79.7mm (125%) was high, but not exceptionally so, ranking 20th in 61 years. Wettest days were 21st (26mm), 24th (14mm), 3rd (11.5mm), 28th(6mm) and 9th (5.5mm).

Thunder on 13th from 1520 and again from 1645. Windiest days 9th, 24th, 16th, 29th.

20.3 mmax (C) 
12.2 mmin (C) 
16.3 mean(C)  +2.4 diff from av (C)
26.7 high max (C) on 14th 
14.5 low max (C) on 26th   
17.1 high min (C) on 7th
  8.3 low min (C) on 23rd

79.7 rain total (mm)
125.5 % of av 
16 raindays (days with >=0.2mm)
13 wetdays (days with >=1mm)
  5 very wet days (days with >=5mm)

Thunder heard on 13th at 1520 and 1645
No Ground frost 
No Air frost
65% cloud cover percent
93% mean RH 

 

October 2016 November 2016 December 2016


October was a mild month ranking 21st in 61 years here, but less mild than 2011and 2013-2015. This follows Aug and Sept which together were the mildest in the last 13 years.

 

Rainfall was low, the 8th driest in 61 years, the lowest since 2007 and six years back in the 1960s and 70s. Over half the rainfall was on the 1st, the only other significant rain being 15th and 17th.

Cumulatively, 2016 would rank 17th wettest year if NO more rain fell during Nov and Dec, so it is likely that it will be around 8th highest in 61 years.

 

Sunniest days were 2nd-6th, 9th-10th, 12th, 15th-19th.

It was windy 16th-19th, and dull 1st, 7th, 23rd, 25th and 28th-30th.

Visibility at observation hour was poor 11th, 22nd, 29th-31st, the end of the month being humid and misty.

 
14.5 mean max (C) 
  7.2 mean min (C) 
10.9 mean(C)  +0.5 diff from av (C)

18.3 high max (C) on 4, 31
10.6 low max (C) on 13 
12.0 high min (C) on 29
  2.9 low min (C) on 10

33.8 rain total (mm)
41.3 % of av 
 9 raindays (days with >=0.2mm)
 3 wetdays (days with >=1mm)
 1 very wet days (days with >=5mm)

65% cloud cover percent
94% mean RH  


November was a cold month, although milder 13th-16th, ground frosts recorded on 17 mornings, and air frosts on 5 mornings. Many days were dry, the above average months rain falling on 8-9th, 12th and especially 20th,21st,22nd (77mm fell on these very dull three days alone, including 43mm on the 21st). I feared my solar radiation sensor had failed on 21st, as it never exceeded 30W/m2 that day!

Nevertheless some good sunny days at the beginning and the end of the month.

The mean temperature 5.3C ranks 8th lowest in 61 years here, and it is the 8th wettest November (but not as wet as 2008, 2009, 2012 or 2014).

Total rainfall from Jan-Nov is 951mm, and this ranks 7th highest against all Jan-Dec rainfall totals, so if we get an average rainfall during December, we are likely going to have the 4th wettest year in 6 decades. The three wettest so far are 2014, 2012 and 1960, so we are clearly seeing a pattern to more extreme rainfall of late.

 8.2 mean max (C) 
 2.5 mean min (C) 
 5.3 mean(C)  -1.5 diff from av (C)

14.3 high max (C) on 15
  4.4 low max (C) on 20
  9.9 high min (C) on 15
 -4.6 low min (C) on 30

120.4 rain total (mm)
164.3% of av 
 18 raindays (days with >=0.2mm)
 11 wetdays (days with >=1mm)
   5 very wet days (days with >=5mm)

59% cloud cover percent
93% mean RH 

Autumn Stats

SEASONAL REPORT FOR SUMMER 
Sep 2016, Oct 2016, Nov 2016

Statistically the 3 months of Autumn have been a little milder than usual, and a bit wetter than usual, but this hides variation between the months.

HiMax temperature was 6th highest since 1956. 
HiMin was joint highest (shares the record with 2011)
Mean temperature was the 13th= highest.

However temperatures varied from 2.4deg above normal in a very warm Sept, 0.5deg above normal in Oct and 1.5deg below normal in a cool Nov,

Rainfall anomaly was 125% in Sept, only 41% in a dry Oct, then 164% in a wet Nov.

So the variations between the three months have been quite significant, the swings from wet to dry do appear to be getting greater, and this will be analysed in greater depth for this location over the last 61 years.

                   this year    normal     anomaly

HiMax              26.7       28.4
MeanMax      14.3       13.8          +0.5 
LoMax              4.4        -2.0                             

MEAN             10.8       10.2          +0.6 

HighMin            17.1       17.1                            
MeanMin         7.3        6.6           +0.7
LoMin               -4.6       -8.1                             

RAINFALL      233.9     211.1       110.8%

Raindays          43        45.7           -2.7
Wet Days          27        33.5           -6.5
V Wet Days       12       13.9           -1.9

Oktas                 5.0       5.5

A mild and dry December.
Temperatures were significantly above normal between 6th  and 26th , with 5 airfrosts at the beginning of the month and 2 at the end. The mean temp anomaly was +1.5deg ranking 9th  mildest (in 61 records here). The LowMax was 5th highest and MeanMax 7th highest on record.

Rainfall ranked 8th lowest for December, wettest day was 10.2mm on 10th, but no other days exceeded 3.7mm., keeping the months total to 30.4mm.

Windiest days were 23rd to 25th and 7th to 9th , and many days enjoyed winds from the southerly direction.

Many days were bright, especially sunny on 1st, 4th, 14th, 22nd, and 26th to 30th. Dullest days were 6th,12-13th,19th, 23rd and 31st. 

The predominantly anticyclonic month kept pressures higher than usual (apart from 1st, 4-5th and 27th ) so unsurprisingly the highest mean pressure and highest minimum pressure were recorded in 61 years.

 8.6 mean max (C) 
 3.1 mean min (C) 
 5.8 mean (C)  +1.5 diff from av (C)

13.4 high max (C) on 8
 4.8 low max (C) on 27 
 9.6 high min (C) on 10 

-4.1 low min (C) on 1

 30.4 rain total (mm) 42% of av 
17 raindays (>=0.2mm)
 7 wetdays (>=1mm)
 1 very wet day (>=5mm)
 
12 ground frosts
  7 air frosts 
59 cloud cover% 

94 mean RH% 

 
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