|
December 2020 |
 |
|
A trip over the border into
Dorset and the cliffs at Seatown lit by a watery, winter sun |
|
A very wet month with average
temperatures and sunshine. Wettest December since 2012 (171.5 mm);
coldest since 2017 (6.3°C) and the dullest since 2019 (87.5 hours). |
|
Summary for December 2020 |
|
Mean Max: |
10.0ºC |
(+0.6ºC) |
|
Mean Min: |
2.9ºC |
(-0.4ºC) |
|
Mean: |
6.5ºC |
(+0.1ºC) |
|
High Max: |
14.3ºC |
21st |
|
Low Max: |
4.3ºC |
30th |
|
High Min: |
11.7ºC |
18th |
|
Low Min: |
-3.3ºC |
31st |
|
Mean Grass Min: |
1.4ºC |
|
|
Grass Min: |
-3.3ºC |
8th |
|
Days >25°C |
0 Days |
|
|
Days >20°C |
0 Days |
|
|
Nights >15°C |
0 Days |
|
|
Nights <10°C |
29 Days |
|
|
Rain Total (gauge): |
130.9 mm |
(146%) |
|
Rain Total (tipping bucket): |
124.6 mm |
(139%) |
|
Rain Days >0.2 mm: |
19 Days |
|
|
Rain Days >1.0 mm: |
18 Days |
|
|
Max 24 hrs: |
19.0 mm |
10th |
|
Days without any rain: |
11 |
|
|
Air Frost: |
6 Days |
|
|
Grass Frost: |
2 Days |
|
|
Snow Falling: |
0 Days |
|
|
Snow (50%) @ 9am: |
0 Days |
|
|
Ice Days: |
0 Days |
|
|
Thunder Heard: |
0 Days |
|
|
Hail <5 mm: |
0 Days |
|
|
Hail >5 mm: |
0 Days |
|
|
Fog @ 9am: |
0 Days |
|
|
Total Monthly Sunshine: |
87.6 Hours |
(110%) |
|
Most Sunshine in a Day: |
7.3 Hours |
31st |
|
Average Daily Sunshine: |
2.8 Hours |
|
|
Sunless Days: |
0 Days |
|
|
Cloudless Days: |
0 Days |
|
|
Total Possible Sunshine: |
277.1 Hours |
|
|
Percentage of Total Sun: |
32% |
|
|
Average Sunny Interval: |
15.9 |
mins |
|
Maximum UV Index: |
1.3 |
1st |
|
Mean Soil Temp @ 10 cm: |
9.6ºC |
|
|
Min Soil Temp @ 10 cm: |
6.5ºC |
#DIV/0! |
|
Max Soil Temp @ 10 cm: |
12.9ºC |
#DIV/0! |
|
Mean Soil Temp @ 30 cm: |
11.2ºC |
|
|
Min Soil Temp @ 30 cm: |
8.2ºC |
#DIV/0! |
|
Max Soil Temp @ 30 cm: |
13.9ºC |
#DIV/0! |
|
Mean Soil Temp @ 100 cm: |
12.3ºC |
|
|
Min Soil Temp @ 100 cm: |
10.7ºC |
#DIV/0! |
|
Max Soil Temp @ 100 cm: |
13.9ºC |
#DIV/0! |
|
Ave 10 Min Wind >39 mph: |
0.00 Days |
|
|
N: |
5.06 Days |
16% |
|
NE: |
0.74 Days |
2% |
|
E: |
0.11 Days |
0% |
|
SE: |
0.53 Days |
2% |
|
S: |
5.18 Days |
17% |
|
SW: |
5.52 Days |
18% |
|
W: |
1.26 Days |
4% |
|
NW: |
3.57 Days |
12% |
|
Calm: |
9.04 Days |
29% |
|
Wind Chill Low: |
-4.9ºC |
7th |
|
Mean Wind: |
4.2 mph |
|
|
Max Gust: |
48 mph |
27th |
|
Mean Cloud Cover: |
#DIV/0! |
|
|
Mean RH @ 9am: |
97% |
|
|
Rain >0.1mm/hour: |
39.1 Hours |
|
|
Frost Duration: |
51.8 Hours |
|
|
Air Frost in a Day: |
11.7 Hours |
30th |
|
Mean Sea Temperature: |
11.0ºC |
(+0.6ºC) |
|
Normal for Month: |
10.4ºC |
|
|
Max Sea Temperature: |
12.3ºC |
1st |
|
Min Sea Temperature: |
8.2ºC |
25th |
|
Mean Pressure @ 9am: |
1002.9 hPa |
|
|
Mean Pressure: |
1002.9 hPa |
|
|
Max Pressure: |
1034.8 hPa |
25th |
|
Min Pressure: |
969.3 hPa |
28th |
|
Max Change in 24 hours: |
35.4 hPa |
3rd |
|
Radiation Daily Mean: |
2.66 MJ/m² |
|
|
Max Daily Value: |
4.03 MJ/m² |
1st |
|
Min Daily Value: |
0.91 MJ/m² |
18th |
|
Number of Days with Data: |
31 Days |
|
|
1-Hour Maximum: |
240 W/m² |
1st |
|
Starting Time of the Hour: |
|
13:00 |
|
Max Dewpoint: |
13.5ºC |
21st |
|
Min Dewpoint: |
-4.0ºC |
30th |
|
Mean Dewpoint: |
5.1ºC |
|
|
Max Humidity: |
100% |
8th |
|
Min Humidity: |
71% |
24th |
|
Mean Humidity: |
92% |
|
 |
|
|
|
Weather Data for Otter Valley, Devon.
December 2020 |
|
|
Temp oC |
Grass |
Hum (%) |
Soil oC
(cm) |
Soil |
DP (oC) |
Wind (mph) |
Rain |
Air (hPa) |
W/m² |
UV |
Sun |
Frost |
Sea |
Observations |
|
|
Min |
Max |
Min |
Min |
Max |
10 |
30 |
100 |
(cb) |
Min |
Max |
Max |
Ave |
Run |
mm |
Min |
Max |
Max |
Max |
Hours |
Hours |
Temp |
|
1 |
1.7 |
10.2 |
0.0 |
78 |
98 |
N/A |
N/A |
N/A |
N/A |
1.1 |
9.9 |
16 |
2.4 |
57 |
0.0 |
1024 |
1029 |
308 |
1.3 |
4.5 |
0.0 |
11.8 |
Sunny intervals all day |
|
2 |
4.8 |
10.6 |
0.0 |
85 |
98 |
N/A |
N/A |
N/A |
N/A |
2.0 |
9.5 |
18 |
0.9 |
21 |
0.0 |
1013 |
1027 |
164 |
1.3 |
0.7 |
0.0 |
11.6 |
Brief sunny ints all day |
|
3 |
2.5 |
8.1 |
0.0 |
89 |
98 |
N/A |
N/A |
N/A |
N/A |
1.8 |
7.0 |
13 |
1.3 |
31 |
2.4 |
978 |
1013 |
191 |
1.0 |
1.2 |
0.0 |
11.7 |
Sunny intervals all day |
|
4 |
0.7 |
8.3 |
0.0 |
73 |
96 |
N/A |
N/A |
N/A |
N/A |
-0.3 |
4.3 |
24 |
2.5 |
61 |
0.0 |
977 |
982 |
230 |
1.2 |
3.9 |
0.0 |
11.4 |
Sunny intervals all day |
|
5 |
2.2 |
6.5 |
0.0 |
91 |
98 |
N/A |
N/A |
N/A |
N/A |
1.7 |
5.8 |
22 |
4.1 |
97 |
4.4 |
980 |
998 |
180 |
1.0 |
1.3 |
0.0 |
11.5 |
Sunny intervals all day |
|
6 |
0.3 |
8.1 |
0.0 |
85 |
97 |
N/A |
N/A |
N/A |
N/A |
-1.7 |
5.8 |
8 |
0.3 |
7 |
0.0 |
998 |
1003 |
159 |
1.2 |
6.1 |
0.0 |
10.7 |
Sunny intervals all day |
|
7 |
-2.2 |
6.7 |
13.9 |
81 |
98 |
12.9 |
13.9 |
13.9 |
N/A |
-3.0 |
5.0 |
13 |
1.9 |
46 |
0.2 |
997 |
1002 |
257 |
1.2 |
5.4 |
10.1 |
10.9 |
Sunny intervals all day |
|
8 |
-2.1 |
8.6 |
-3.3 |
82 |
100 |
9.4 |
11.5 |
12.5 |
0.0 |
-2.9 |
6.0 |
9 |
0.6 |
14 |
0.0 |
1000 |
1007 |
305 |
1.2 |
7.1 |
11.5 |
10.2 |
Sunny intervals all day |
|
9 |
-0.8 |
9.9 |
-2.8 |
89 |
100 |
6.5 |
8.2 |
10.7 |
0.0 |
-1.5 |
8.3 |
31 |
2.3 |
56 |
2.8 |
998 |
1010 |
136 |
0.9 |
0.2 |
3.9 |
10.6 |
Brief sunny ints all day |
|
10 |
7.4 |
10.8 |
17.8 |
92 |
99 |
N/A |
N/A |
N/A |
0.0 |
6.5 |
9.8 |
30 |
4.0 |
97 |
19.0 |
992 |
999 |
234 |
1.3 |
0.4 |
0.0 |
10.6 |
Brief sunny ints all day |
|
11 |
6.1 |
11.5 |
17.8 |
89 |
100 |
N/A |
N/A |
N/A |
0.0 |
4.5 |
11.0 |
23 |
0.8 |
19 |
2.2 |
985 |
992 |
211 |
1.2 |
3.9 |
0.0 |
10.4 |
Sunny intervals all day |
|
12 |
5.6 |
9.9 |
0.0 |
83 |
100 |
N/A |
N/A |
N/A |
N/A |
0.0 |
8.4 |
17 |
2.3 |
55 |
2.2 |
990 |
1008 |
257 |
1.2 |
5.0 |
0.0 |
10.5 |
Sunny intervals all day |
|
13 |
0.5 |
12.6 |
0.0 |
92 |
100 |
N/A |
N/A |
N/A |
N/A |
-0.2 |
12.3 |
34 |
7.6 |
181 |
7.4 |
995 |
1008 |
124 |
1.0 |
0.5 |
0.0 |
10.9 |
Brief sunny ints all day |
|
14 |
8.6 |
12.4 |
0.0 |
83 |
96 |
N/A |
N/A |
N/A |
N/A |
6.9 |
11.3 |
29 |
8.4 |
202 |
9.0 |
994 |
999 |
207 |
1.2 |
1.5 |
0.0 |
11.1 |
Sunny intervals all day |
|
15 |
2.5 |
11.2 |
0.0 |
85 |
100 |
N/A |
N/A |
N/A |
N/A |
1.9 |
9.3 |
28 |
3.7 |
88 |
2.4 |
999 |
1006 |
213 |
1.3 |
5.2 |
0.0 |
11.0 |
Sunny intervals all day |
|
16 |
4.6 |
11.6 |
0.0 |
86 |
97 |
N/A |
N/A |
N/A |
N/A |
3.8 |
10.6 |
36 |
6.1 |
146 |
3.6 |
1001 |
1007 |
72 |
0.8 |
0.0 |
0.0 |
10.9 |
Cloudy all day |
|
17 |
0.9 |
12.3 |
0.0 |
89 |
100 |
N/A |
N/A |
N/A |
N/A |
0.4 |
11.1 |
28 |
4.9 |
118 |
0.0 |
1007 |
1015 |
252 |
1.3 |
3.6 |
0.0 |
11.1 |
Sunny intervals all day |
|
18 |
11.7 |
12.8 |
0.0 |
95 |
99 |
N/A |
N/A |
N/A |
N/A |
10.9 |
12.6 |
44 |
16.9 |
406 |
10.2 |
1002 |
1013 |
28 |
0.0 |
0.0 |
0.0 |
11.7 |
Cloudy all day |
|
19 |
6.6 |
12.7 |
0.0 |
77 |
98 |
N/A |
N/A |
N/A |
N/A |
5.4 |
11.6 |
38 |
10.0 |
239 |
10.0 |
999 |
1007 |
215 |
1.2 |
3.7 |
0.0 |
11.6 |
Sunny intervals all day |
|
20 |
3.1 |
11.6 |
0.0 |
76 |
100 |
N/A |
N/A |
N/A |
N/A |
2.0 |
8.1 |
19 |
2.9 |
70 |
0.6 |
1007 |
1015 |
198 |
1.2 |
6.1 |
0.0 |
10.9 |
Sunny intervals all day |
|
21 |
4.6 |
14.3 |
0.0 |
94 |
100 |
N/A |
N/A |
N/A |
N/A |
4.3 |
13.5 |
26 |
7.4 |
178 |
11.0 |
1002 |
1014 |
146 |
1.0 |
0.2 |
0.0 |
11.6 |
Brief sunny ints all day |
|
22 |
10.2 |
13.7 |
0.0 |
90 |
99 |
N/A |
N/A |
N/A |
N/A |
9.3 |
12.9 |
19 |
2.9 |
70 |
0.0 |
1004 |
1013 |
93 |
0.9 |
0.0 |
0.0 |
11.4 |
Cloudy all day |
|
23 |
9.3 |
12.4 |
0.0 |
96 |
99 |
N/A |
N/A |
N/A |
N/A |
7.6 |
12.2 |
31 |
7.2 |
172 |
12.6 |
996 |
1009 |
93 |
0.8 |
0.0 |
0.0 |
11.6 |
Cloudy all day |
|
24 |
2.3 |
8.2 |
0.0 |
71 |
96 |
N/A |
N/A |
N/A |
N/A |
-0.3 |
7.4 |
30 |
7.8 |
188 |
0.0 |
1004 |
1032 |
248 |
1.2 |
4.9 |
0.0 |
10.9 |
Sunny intervals all day |
|
25 |
-1.4 |
6.9 |
0.0 |
74 |
97 |
N/A |
N/A |
N/A |
N/A |
-2.4 |
3.0 |
13 |
1.4 |
34 |
0.0 |
1032 |
1035 |
249 |
1.3 |
5.6 |
9.0 |
9.9 |
Sunny intervals all day |
|
26 |
0.1 |
10.8 |
0.0 |
87 |
100 |
N/A |
N/A |
N/A |
N/A |
-0.8 |
9.5 |
27 |
4.8 |
115 |
0.0 |
1003 |
1032 |
165 |
1.0 |
0.3 |
0.0 |
11.4 |
Brief sunny ints all day |
|
27 |
4.2 |
10.9 |
0.0 |
78 |
96 |
N/A |
N/A |
N/A |
N/A |
1.5 |
9.3 |
48 |
7.5 |
179 |
14.2 |
972 |
1002 |
242 |
1.2 |
6.0 |
0.0 |
10.7 |
Sunny intervals all day |
|
28 |
-0.4 |
6.5 |
0.0 |
86 |
100 |
N/A |
N/A |
N/A |
N/A |
-1.1 |
5.1 |
28 |
2.5 |
61 |
5.2 |
969 |
982 |
279 |
1.0 |
0.5 |
1.9 |
10.5 |
Brief sunny ints all day |
|
29 |
0.7 |
7.2 |
0.0 |
81 |
100 |
N/A |
N/A |
N/A |
N/A |
-0.8 |
4.5 |
19 |
3.5 |
87 |
2.4 |
983 |
1001 |
188 |
1.0 |
2.1 |
0.0 |
10.3 |
Sunny intervals all day |
|
30 |
0.1 |
4.3 |
0.0 |
95 |
100 |
N/A |
N/A |
N/A |
N/A |
-4.0 |
4.2 |
6 |
0.5 |
20 |
2.8 |
1001 |
1007 |
185 |
0.8 |
0.0 |
11.7 |
9.6 |
Light rain all day |
|
31 |
-3.3 |
5.4 |
0.0 |
89 |
100 |
N/A |
N/A |
N/A |
N/A |
-2.1 |
4.0 |
9 |
0.8 |
8 |
0.0 |
1006 |
1008 |
206 |
1.2 |
7.3 |
3.8 |
10.9 |
Sunny all day |
|
|
2.9 |
10.0 |
1.4 |
85 |
99 |
9.6 |
11.2 |
12.3 |
N/A |
1.6 |
8.5 |
24 |
4.2 |
3125 |
124.6 |
997 |
1009 |
195 |
1.1 |
87.6 |
48.1 |
11.0 |
|
 |
|
|
UV Light
|
Month So Far
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Year So Far
|
Recording Data
|
Time-Lapse Videos
|
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|
Humidity Calculation
|
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