|
December 2021 |
 |
|
Sunshine out over Lyme Bay on a fine
December afternoon |
|
An mild and extremely dull month
with average rainfall. |
|
Summary for December 2021 |
|
Mean Max: |
11.1ºC |
(+1.8ºC) |
|
Mean Min: |
5.8ºC |
(+2.5ºC) |
|
Mean: |
8.5ºC |
(+2.2ºC) |
|
High Max: |
15.3ºC |
31st |
|
Low Max: |
7.8ºC |
20th |
|
High Min: |
13.6ºC |
30th |
|
Low Min: |
-1.6ºC |
2nd |
|
Mean Grass Min: |
-0.6ºC |
|
|
Grass Min: |
-5.6ºC |
2nd |
|
Days >10°C |
21 Days |
|
|
Days >5°C |
31 Days |
|
|
Nights >10°C |
4 Days |
|
|
Nights >5°C |
19 Days |
|
|
Rain Total (gauge): |
90.2 mm |
(100%) |
|
Rain Total (tipping bucket): |
88.0 mm |
(98%) |
|
Rain Days >0.2 mm: |
19 Days |
|
|
Rain Days >1.0 mm: |
14 Days |
|
|
Max 24 hrs: |
20.2 mm |
25th |
|
Days without any rain: |
12 |
|
|
Air Frost: |
2 Days |
|
|
Grass Frost: |
10 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: |
47.9 Hours |
(59%) |
|
Most Sunshine in a Day: |
6.6 Hours |
10th |
|
Average Daily Sunshine: |
1.5 Hours |
|
|
Sunless Days: |
0 Days |
|
|
Cloudless Days: |
0 Days |
|
|
Total Possible Sunshine: |
249.7 Hours |
|
|
Percentage of Total Sun: |
19% |
|
|
Average Sunny Interval: |
14.3 |
mins |
|
Maximum UV Index: |
1.3 |
1st |
|
Mean Soil Temp @ 10 cm: |
8.5ºC |
|
|
Min Soil Temp @ 10 cm: |
6.1ºC |
|
|
Max Soil Temp @ 10 cm: |
12.8ºC |
|
|
Mean Soil Temp @ 30 cm: |
9.1ºC |
|
|
Min Soil Temp @ 30 cm: |
6.8ºC |
|
|
Max Soil Temp @ 30 cm: |
13.2ºC |
|
|
Mean Soil Temp @ 100 cm: |
11.2ºC |
|
|
Min Soil Temp @ 100 cm: |
9.4ºC |
|
|
Max Soil Temp @ 100 cm: |
14.0ºC |
|
|
Ave 10 Min Wind >39 mph: |
0.00 Days |
|
|
N: |
2.29 Days |
7% |
|
NE: |
1.46 Days |
5% |
|
E: |
2.01 Days |
6% |
|
SE: |
1.85 Days |
6% |
|
S: |
6.11 Days |
20% |
|
SW: |
5.48 Days |
18% |
|
W: |
1.85 Days |
6% |
|
NW: |
4.07 Days |
13% |
|
Calm: |
5.88 Days |
19% |
|
Wind Chill Low: |
-3.1ºC |
2nd |
|
Mean Wind: |
3.8 mph |
|
|
Max Gust: |
44 mph |
7th |
|
Mean Cloud Cover: |
70% |
|
|
Mean RH @ 9am: |
93% |
|
|
Rain >0.1mm/hour: |
26.5 Hours |
|
|
Frost Duration: |
12.1 Hours |
|
|
Air Frost in a Day: |
9.2 Hours |
2nd |
|
Mean Sea Temperature: |
10.9ºC |
(+0.5ºC) |
|
Normal for Month: |
10.4ºC |
|
|
Max Sea Temperature: |
12.0ºC |
31st |
|
Min Sea Temperature: |
9.0ºC |
9th |
|
Mean Pressure @ 9am: |
1013.1 hPa |
|
|
Mean Pressure: |
1013.4 hPa |
|
|
Max Pressure: |
1040.6 hPa |
17th |
|
Min Pressure: |
985.2 hPa |
28th |
|
Max Change in 24 hours: |
26.4 hPa |
7th |
|
Radiation Daily Mean: |
2.48 MJ/m² |
|
|
Max Daily Value: |
4.68 MJ/m² |
2nd |
|
Min Daily Value: |
1.15 MJ/m² |
25th |
|
Number of Days with Data: |
31 Days |
|
|
1-Hour Maximum: |
268 W/m² |
5th |
|
Starting Time of the Hour: |
|
13:00 |
|
Max Dewpoint: |
14.1ºC |
29th |
|
Min Dewpoint: |
-2.6ºC |
2nd |
|
Mean Dewpoint: |
6.9ºC |
|
|
Max Humidity: |
100% |
6th |
|
Min Humidity: |
65% |
5th |
|
Mean Humidity: |
91% |
|
 |
|
|
|
Weather Data for Otter Valley, Devon.
December 2021 |
|
|
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 |
8.1 |
11.4 |
2.8 |
76 |
96 |
8.1 |
8.2 |
10.6 |
N/A |
3.5 |
10.6 |
30 |
7.2 |
173 |
4.2 |
1000 |
1009 |
318 |
1.3 |
4.4 |
0.0 |
11.6 |
Sunny ints all day |
|
2 |
-1.6 |
8.2 |
-5.6 |
66 |
99 |
6.9 |
8.0 |
10.1 |
N/A |
-2.6 |
4.0 |
19 |
1.9 |
46 |
0.0 |
1009 |
1018 |
272 |
1.3 |
5.8 |
9.2 |
11.1 |
Sunny ints all day |
|
3 |
0.9 |
11.7 |
-4.4 |
95 |
99 |
6.8 |
7.5 |
10.5 |
N/A |
-1.8 |
11.3 |
21 |
1.2 |
28 |
8.6 |
999 |
1016 |
148 |
1.0 |
0.2 |
0.0 |
10.8 |
Brief sunny ints all day |
|
4 |
5.0 |
9.6 |
-0.6 |
77 |
99 |
7.2 |
7.8 |
10.0 |
N/A |
2.2 |
7.9 |
28 |
3.2 |
77 |
3.8 |
999 |
1005 |
399 |
1.2 |
3.4 |
0.0 |
11.1 |
Sunny ints all day |
|
5 |
4.9 |
9.2 |
-2.2 |
65 |
93 |
6.7 |
7.7 |
10.0 |
N/A |
0.4 |
4.8 |
26 |
6.3 |
152 |
0.6 |
1004 |
1018 |
270 |
1.2 |
6.1 |
0.0 |
11.0 |
Sunny ints all day |
|
6 |
0.2 |
11.4 |
-2.2 |
78 |
100 |
6.3 |
7.2 |
10.0 |
N/A |
-0.7 |
10.1 |
27 |
2.8 |
66 |
3.8 |
1007 |
1018 |
310 |
1.2 |
2.7 |
0.0 |
10.5 |
Sunny ints all day |
|
7 |
-0.6 |
10.4 |
-2.8 |
76 |
100 |
6.3 |
7.1 |
9.8 |
N/A |
-1.3 |
10.0 |
44 |
6.8 |
163 |
8.6 |
986 |
1012 |
206 |
1.2 |
2.0 |
2.9 |
10.8 |
Sunny ints all day |
|
8 |
5.8 |
9.4 |
1.1 |
69 |
90 |
6.2 |
7.2 |
9.4 |
N/A |
1.8 |
4.6 |
24 |
6.1 |
146 |
1.0 |
986 |
1002 |
341 |
1.0 |
5.6 |
0.0 |
11.2 |
Sunny ints all day |
|
9 |
1.4 |
10.7 |
-2.2 |
76 |
99 |
6.1 |
6.8 |
9.4 |
N/A |
-0.1 |
10.5 |
23 |
3.0 |
72 |
2.6 |
994 |
1005 |
113 |
0.9 |
0.0 |
0.0 |
10.9 |
Cloudy all day |
|
10 |
5.4 |
9.4 |
-2.2 |
71 |
93 |
6.4 |
7.2 |
9.4 |
N/A |
0.4 |
8.3 |
23 |
6.2 |
148 |
0.4 |
994 |
1012 |
260 |
1.2 |
6.6 |
0.0 |
10.8 |
Sunny ints all day |
|
11 |
2.2 |
11.4 |
-0.6 |
94 |
99 |
6.4 |
6.8 |
9.4 |
N/A |
0.9 |
11.2 |
11 |
1.2 |
30 |
1.0 |
1012 |
1018 |
80 |
0.9 |
0.0 |
0.0 |
10.6 |
Cloudy all day |
|
12 |
9.4 |
12.6 |
6.1 |
89 |
100 |
7.2 |
7.2 |
9.4 |
N/A |
8.6 |
12.2 |
25 |
3.7 |
88 |
0.0 |
1018 |
1022 |
125 |
1.0 |
0.3 |
0.0 |
11.1 |
Brief sunny ints all day |
|
13 |
11.0 |
12.0 |
0.0 |
93 |
99 |
7.6 |
7.3 |
10.6 |
N/A |
10.4 |
11.1 |
21 |
6.4 |
154 |
2.6 |
1021 |
1025 |
100 |
0.8 |
0.0 |
0.0 |
11.2 |
Cloudy all day |
|
14 |
8.9 |
12.6 |
0.0 |
94 |
99 |
7.8 |
7.4 |
10.6 |
N/A |
8.2 |
12.0 |
12 |
1.8 |
43 |
0.0 |
1024 |
1029 |
56 |
0.8 |
0.0 |
0.0 |
11.1 |
Cloudy all day |
|
15 |
11.0 |
12.7 |
0.0 |
88 |
98 |
8.3 |
7.9 |
10.6 |
N/A |
9.5 |
11.5 |
10 |
1.5 |
35 |
0.0 |
1029 |
1035 |
73 |
0.8 |
0.0 |
0.0 |
11.2 |
Cloudy all day |
|
16 |
8.6 |
11.9 |
0.0 |
81 |
99 |
8.5 |
8.1 |
10.6 |
N/A |
6.9 |
10.8 |
8 |
0.4 |
10 |
0.0 |
1035 |
1040 |
112 |
0.9 |
0.0 |
0.0 |
11.1 |
Cloudy all day |
|
17 |
6.8 |
10.1 |
0.0 |
78 |
93 |
8.8 |
8.6 |
10.6 |
N/A |
4.6 |
7.6 |
11 |
2.4 |
58 |
0.0 |
1038 |
1041 |
86 |
0.9 |
0.8 |
0.0 |
11.3 |
Sunny ints all day |
|
18 |
4.1 |
9.1 |
0.0 |
86 |
97 |
9.4 |
9.4 |
10.3 |
N/A |
1.0 |
7.5 |
14 |
3.0 |
71 |
0.0 |
1037 |
1038 |
121 |
1.0 |
1.6 |
0.0 |
11.2 |
Sunny ints all day |
|
19 |
1.1 |
8.0 |
0.0 |
93 |
99 |
9.8 |
9.6 |
10.2 |
N/A |
0.3 |
7.2 |
9 |
1.1 |
27 |
0.0 |
1031 |
1038 |
162 |
1.0 |
1.2 |
0.0 |
10.9 |
Sunny ints all day |
|
20 |
3.9 |
7.8 |
0.0 |
86 |
97 |
9.7 |
9.7 |
10.2 |
N/A |
3.0 |
5.9 |
12 |
2.6 |
63 |
0.0 |
1026 |
1031 |
122 |
1.0 |
0.0 |
0.0 |
10.9 |
Cloudy all day |
|
21 |
6.9 |
8.0 |
0.0 |
79 |
86 |
9.6 |
9.8 |
10.3 |
N/A |
3.6 |
5.4 |
16 |
3.4 |
82 |
0.0 |
1022 |
1026 |
92 |
0.9 |
0.0 |
0.0 |
10.8 |
Cloudy all day |
|
22 |
6.1 |
9.3 |
-3.9 |
82 |
93 |
9.5 |
10.0 |
10.4 |
N/A |
3.5 |
8.3 |
17 |
4.1 |
97 |
0.0 |
1012 |
1022 |
110 |
0.9 |
0.0 |
0.0 |
10.5 |
Cloudy all day |
|
23 |
4.2 |
13.3 |
0.0 |
91 |
100 |
9.4 |
9.8 |
10.6 |
N/A |
3.2 |
13.2 |
19 |
3.3 |
80 |
1.6 |
1005 |
1012 |
202 |
0.9 |
1.6 |
0.0 |
10.0 |
Sunny ints all day |
|
24 |
3.6 |
11.6 |
0.0 |
96 |
100 |
9.5 |
9.9 |
10.7 |
N/A |
2.9 |
11.2 |
18 |
2.2 |
53 |
3.2 |
1000 |
1008 |
103 |
0.9 |
0.0 |
0.0 |
10.0 |
Cloudy all day |
|
25 |
5.1 |
11.3 |
0.0 |
97 |
100 |
9.5 |
10.0 |
10.7 |
N/A |
4.3 |
11.0 |
21 |
3.6 |
85 |
20.2 |
999 |
1001 |
62 |
0.9 |
0.0 |
0.0 |
10.3 |
Cloudy all day |
|
26 |
6.0 |
11.7 |
0.0 |
93 |
100 |
9.6 |
10.1 |
10.8 |
N/A |
5.1 |
11.1 |
14 |
0.6 |
15 |
3.0 |
999 |
1001 |
232 |
1.2 |
2.3 |
0.0 |
10.0 |
Sunny ints all day |
|
27 |
6.7 |
13.0 |
0.0 |
92 |
100 |
9.7 |
10.2 |
10.8 |
N/A |
6.2 |
12.2 |
25 |
5.2 |
125 |
10.8 |
985 |
999 |
206 |
1.0 |
0.2 |
0.0 |
10.3 |
Brief sunny ints all day |
|
28 |
9.9 |
12.2 |
0.0 |
81 |
98 |
9.8 |
10.3 |
10.9 |
N/A |
7.2 |
11.0 |
30 |
5.9 |
142 |
0.8 |
985 |
1005 |
146 |
1.0 |
1.1 |
0.0 |
10.6 |
Sunny ints all day |
|
29 |
9.2 |
15.2 |
0.0 |
88 |
100 |
10.0 |
10.4 |
10.9 |
N/A |
8.1 |
14.1 |
27 |
4.8 |
119 |
9.6 |
1001 |
1010 |
128 |
1.0 |
0.3 |
0.0 |
11.1 |
Brief sunny ints all day |
|
30 |
13.6 |
14.2 |
0.0 |
92 |
98 |
10.2 |
10.5 |
11.0 |
N/A |
11.6 |
13.7 |
31 |
10.7 |
389 |
1.6 |
1010 |
1017 |
124 |
0.9 |
0.5 |
0.0 |
11.4 |
Brief sunny ints all day |
|
31 |
12.7 |
15.3 |
0.0 |
90 |
99 |
10.3 |
10.6 |
11.0 |
N/A |
12.2 |
14.0 |
21 |
3.9 |
41 |
0.0 |
1017 |
1020 |
197 |
1.2 |
1.0 |
0.0 |
10.9 |
Sunny ints all day |
|
|
5.8 |
11.1 |
-0.5 |
84 |
97 |
8.3 |
8.7 |
10.3 |
N/A |
4.0 |
9.8 |
21 |
3.8 |
2879 |
88.0 |
1009 |
1018 |
170 |
1.0 |
47.9 |
12.1 |
10.9 |
|
 |
|
|
UV Light
|
Month So Far
|
Year So Far
|
Recording Data
|
Time-Lapse Videos
|
World
Weather |
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|
Humidity Calculation
|
Links |
