|
September 2021 |
 |
|
A September shimmery seascape
over the border in Cornwall |
|
Summer lasted right through
until the 27th then much cooler and wetter. Warmer than normal with
around average rainfall. Slightly less sunnier than usual. |
|
Summary for September 2021 |
|
Mean Max: |
21.5ºC |
(+2.4ºC) |
|
Mean Min: |
10.9ºC |
(+0.0ºC) |
|
Mean: |
16.2ºC |
(+1.2ºC) |
|
High Max: |
28.2ºC |
7th |
|
Low Max: |
15.9ºC |
28th |
|
High Min: |
19.1ºC |
8th |
|
Low Min: |
5.2ºC |
29th |
|
Mean Grass Min: |
8.9ºC |
|
|
Grass Min: |
2.2ºC |
29th |
|
Days >25°C |
2 Days |
|
|
Days >20°C |
23 Days |
|
|
Nights >15°C |
3 Days |
|
|
Nights >10°C |
16 Days |
|
|
Rain Total (gauge): |
57.8 mm |
(102%) |
|
Rain Total (tipping bucket): |
55.4 mm |
(98%) |
|
Rain Days >0.2 mm: |
9 Days |
|
|
Rain Days >1.0 mm: |
7 Days |
|
|
Max 24 hrs: |
19.0 mm |
28th |
|
Days without any rain: |
21 |
|
|
Air Frost: |
0 Days |
|
|
Grass Frost: |
0 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: |
171.6 Hours |
(88%) |
|
Most Sunshine in a Day: |
12.6 Hours |
6th |
|
Average Daily Sunshine: |
5.7 Hours |
|
|
Sunless Days: |
0 Days |
|
|
Cloudless Days: |
0 Days |
|
|
Total Possible Sunshine: |
378.0 Hours |
|
|
Percentage of Total Sun: |
45% |
|
|
Average Sunny Interval: |
19.8 |
mins |
|
Maximum UV Index: |
5.8 |
6th |
|
Mean Soil Temp @ 10 cm: |
16.7ºC |
|
|
Min Soil Temp @ 10 cm: |
14.0ºC |
30th |
|
Max Soil Temp @ 10 cm: |
18.5ºC |
10th |
|
Mean Soil Temp @ 30 cm: |
16.6ºC |
|
|
Min Soil Temp @ 30 cm: |
14.5ºC |
30th |
|
Max Soil Temp @ 30 cm: |
17.8ºC |
10th |
|
Mean Soil Temp @ 100 cm: |
16.1ºC |
|
|
Min Soil Temp @ 100 cm: |
15.6ºC |
30th |
|
Max Soil Temp @ 100 cm: |
16.6ºC |
10th |
|
Ave 10 Min Wind >39 mph: |
0.00 Days |
|
|
N: |
5.14 Days |
17% |
|
NE: |
2.05 Days |
7% |
|
E: |
1.39 Days |
4% |
|
SE: |
1.28 Days |
4% |
|
S: |
3.81 Days |
12% |
|
SW: |
3.60 Days |
12% |
|
W: |
1.04 Days |
3% |
|
NW: |
3.19 Days |
10% |
|
Calm: |
8.49 Days |
27% |
|
Wind Chill Low: |
4.8ºC |
29th |
|
Mean Wind: |
2.3 mph |
|
|
Max Gust: |
43 mph |
28th |
|
Mean Cloud Cover: |
50% |
|
|
Mean RH @ 9am: |
96% |
|
|
Rain >0.1mm/hour: |
12.4 Hours |
|
|
Frost Duration: |
0.0 Hours |
|
|
Air Frost in a Day: |
0.0 Hours |
1st |
|
Mean Sea Temperature: |
17.9ºC |
(-0.1ºC) |
|
Normal for Month: |
18.0ºC |
|
|
Max Sea Temperature: |
21.5ºC |
6th |
|
Min Sea Temperature: |
17.0ºC |
30th |
|
Mean Pressure @ 9am: |
1018.4 hPa |
|
|
Mean Pressure: |
1018.0 hPa |
|
|
Max Pressure: |
1032.0 hPa |
21st |
|
Min Pressure: |
1000.5 hPa |
27th |
|
Max Change in 24 hours: |
17.0 hPa |
27th |
|
Radiation Daily Mean: |
12.06 MJ/m² |
|
|
Max Daily Value: |
20.12 MJ/m² |
7th |
|
Min Daily Value: |
4.40 MJ/m² |
30th |
|
Number of Days with Data: |
30 Days |
|
|
1-Hour Maximum: |
673 W/m² |
3rd |
|
Starting Time of the Hour: |
|
13:00 |
|
Max Dewpoint: |
20.7ºC |
6th |
|
Min Dewpoint: |
4.5ºC |
29th |
|
Mean Dewpoint: |
13.4ºC |
|
|
Max Humidity: |
100% |
6th |
|
Min Humidity: |
45% |
7th |
|
Mean Humidity: |
84% |
|
 |
|
|
|
Weather Data for Otter Valley, Devon.
September 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 |
14.1 |
18.6 |
11.7 |
71 |
89 |
16.8 |
16.8 |
16.1 |
0.0 |
10.6 |
13.9 |
18 |
2.8 |
68 |
0.0 |
1028 |
1031 |
283 |
2.8 |
1.6 |
0.0 |
17.6 |
Sunny intervals all day |
|
2 |
14.7 |
19.2 |
13.3 |
73 |
85 |
16.9 |
16.7 |
16.1 |
0.0 |
11.3 |
14.7 |
16 |
2.4 |
58 |
0.0 |
1024 |
1030 |
477 |
4.4 |
2.8 |
0.0 |
17.4 |
Sunny intervals all day |
|
3 |
8.5 |
24.0 |
5.6 |
65 |
99 |
16.7 |
16.7 |
16.1 |
0.0 |
7.6 |
17.9 |
12 |
1.7 |
42 |
0.0 |
1018 |
1025 |
822 |
5.6 |
8.1 |
0.0 |
17.6 |
Sunny intervals all day |
|
4 |
8.3 |
23.2 |
6.7 |
71 |
99 |
16.6 |
16.7 |
16.1 |
0.0 |
7.6 |
18.1 |
14 |
1.4 |
33 |
0.0 |
1016 |
1019 |
643 |
5.2 |
12.5 |
0.0 |
17.8 |
Sunny all day |
|
5 |
12.4 |
23.8 |
10.0 |
75 |
98 |
17.1 |
16.7 |
16.1 |
0.0 |
11.5 |
19.7 |
12 |
1.3 |
32 |
0.0 |
1017 |
1021 |
608 |
5.4 |
6.5 |
0.0 |
17.9 |
Sunny intervals all day |
|
6 |
11.4 |
27.7 |
9.4 |
61 |
100 |
17.2 |
16.9 |
16.1 |
0.0 |
10.9 |
20.7 |
11 |
1.2 |
29 |
0.0 |
1021 |
1023 |
621 |
5.8 |
12.6 |
0.0 |
18.7 |
Sunny all day |
|
7 |
12.1 |
28.2 |
10.0 |
45 |
99 |
17.3 |
17.1 |
16.1 |
0.0 |
11.5 |
18.6 |
18 |
1.6 |
38 |
0.0 |
1015 |
1023 |
629 |
5.6 |
12.1 |
0.0 |
17.9 |
Sunny all day |
|
8 |
19.1 |
23.7 |
14.4 |
59 |
93 |
17.9 |
17.2 |
16.1 |
0.0 |
14.5 |
19.5 |
17 |
2.9 |
70 |
0.6 |
1009 |
1015 |
673 |
5.3 |
2.2 |
0.0 |
17.9 |
Sunny intervals all day |
|
9 |
14.6 |
20.3 |
12.2 |
92 |
99 |
18.1 |
17.6 |
16.1 |
0.0 |
13.5 |
19.7 |
17 |
2.0 |
47 |
10.8 |
1006 |
1010 |
526 |
3.8 |
0.7 |
0.0 |
18.2 |
Brief sunny intervals all day |
|
10 |
16.5 |
20.4 |
13.9 |
82 |
99 |
18.5 |
17.8 |
16.6 |
0.0 |
15.7 |
18.0 |
16 |
1.8 |
44 |
1.4 |
1008 |
1015 |
366 |
3.6 |
0.6 |
0.0 |
18.4 |
Brief sunny intervals all day |
|
11 |
9.6 |
21.2 |
7.2 |
63 |
100 |
17.9 |
17.6 |
16.5 |
0.0 |
8.8 |
15.9 |
14 |
1.6 |
38 |
0.0 |
1015 |
1019 |
771 |
5.5 |
6.0 |
0.0 |
18.0 |
Sunny intervals all day |
|
12 |
9.2 |
21.2 |
7.2 |
73 |
99 |
17.0 |
17.1 |
16.3 |
0.0 |
8.5 |
16.8 |
11 |
1.1 |
27 |
0.0 |
1018 |
1020 |
699 |
5.5 |
8.6 |
0.0 |
18.0 |
Sunny intervals all day |
|
13 |
13.1 |
20.9 |
12.2 |
78 |
99 |
17.3 |
17.2 |
16.5 |
0.0 |
12.4 |
17.5 |
11 |
0.7 |
16 |
1.4 |
1014 |
1019 |
656 |
4.9 |
3.8 |
0.0 |
18.0 |
Sunny intervals all day |
|
14 |
14.6 |
20.3 |
11.1 |
82 |
97 |
17.6 |
17.2 |
16.4 |
0.0 |
13.4 |
17.6 |
11 |
2.0 |
47 |
1.2 |
1011 |
1014 |
482 |
4.5 |
3.2 |
0.0 |
18.0 |
Sunny intervals all day |
|
15 |
9.4 |
23.2 |
7.8 |
66 |
99 |
17.1 |
17.1 |
16.2 |
0.0 |
8.9 |
17.6 |
13 |
1.2 |
29 |
0.0 |
1012 |
1017 |
796 |
5.1 |
6.5 |
0.0 |
18.1 |
Sunny intervals all day |
|
16 |
12.3 |
21.9 |
10.6 |
74 |
99 |
16.9 |
17.0 |
16.2 |
0.0 |
11.8 |
17.7 |
12 |
0.8 |
19 |
0.0 |
1017 |
1019 |
835 |
5.3 |
2.3 |
0.0 |
18.3 |
Sunny intervals all day |
|
17 |
10.1 |
21.6 |
8.3 |
69 |
100 |
16.9 |
16.9 |
16.1 |
0.0 |
9.3 |
17.8 |
18 |
2.4 |
57 |
0.0 |
1012 |
1017 |
740 |
5.2 |
4.1 |
0.0 |
18.2 |
Sunny intervals all day |
|
18 |
15.4 |
23.1 |
13.3 |
72 |
96 |
17.3 |
17.0 |
16.1 |
0.0 |
14.2 |
19.3 |
15 |
1.0 |
25 |
0.0 |
1012 |
1013 |
747 |
5.3 |
4.6 |
0.0 |
18.3 |
Sunny intervals all day |
|
19 |
11.6 |
21.5 |
8.9 |
62 |
99 |
17.3 |
17.2 |
16.1 |
0.0 |
10.2 |
16.0 |
17 |
2.5 |
60 |
4.0 |
1013 |
1019 |
781 |
4.7 |
9.3 |
0.0 |
18.1 |
Sunny intervals all day |
|
20 |
5.4 |
22.7 |
6.1 |
53 |
100 |
16.2 |
16.5 |
16.1 |
0.0 |
4.8 |
14.1 |
14 |
1.9 |
45 |
0.0 |
1019 |
1028 |
653 |
4.4 |
11.7 |
0.0 |
17.9 |
Sunny all day |
|
21 |
7.6 |
23.1 |
8.3 |
59 |
99 |
16.0 |
16.1 |
16.1 |
0.0 |
7.0 |
16.1 |
11 |
2.0 |
48 |
0.0 |
1028 |
1032 |
583 |
4.7 |
11.7 |
0.0 |
18.0 |
Sunny all day |
|
22 |
7.3 |
21.8 |
8.3 |
64 |
99 |
15.9 |
15.8 |
16.1 |
0.0 |
6.7 |
16.7 |
11 |
1.3 |
32 |
0.0 |
1026 |
1031 |
719 |
4.9 |
6.4 |
0.0 |
18.0 |
Sunny intervals all day |
|
23 |
8.1 |
21.6 |
7.2 |
78 |
100 |
16.0 |
15.8 |
16.1 |
0.0 |
7.0 |
18.2 |
14 |
1.4 |
34 |
0.0 |
1020 |
1026 |
589 |
3.9 |
2.5 |
0.0 |
17.9 |
Sunny intervals all day |
|
24 |
8.0 |
22.5 |
8.3 |
73 |
100 |
15.7 |
15.7 |
16.1 |
0.0 |
7.2 |
17.9 |
11 |
0.7 |
17 |
0.0 |
1016 |
1021 |
661 |
4.8 |
6.4 |
0.0 |
18.0 |
Sunny intervals all day |
|
25 |
13.9 |
19.2 |
12.8 |
88 |
99 |
16.4 |
15.9 |
15.9 |
0.0 |
12.9 |
17.9 |
9 |
0.5 |
12 |
0.0 |
1012 |
1017 |
286 |
2.5 |
0.3 |
0.0 |
18.1 |
Brief sunny intervals all day |
|
26 |
9.3 |
21.4 |
7.8 |
76 |
100 |
15.9 |
16.0 |
15.9 |
0.0 |
8.8 |
17.9 |
21 |
3.4 |
80 |
0.0 |
1010 |
1012 |
789 |
4.6 |
4.7 |
0.0 |
18.0 |
Sunny intervals all day |
|
27 |
10.6 |
18.4 |
3.9 |
70 |
98 |
15.9 |
16.1 |
15.8 |
0.0 |
8.5 |
16.7 |
34 |
6.9 |
165 |
16.6 |
1001 |
1018 |
642 |
4.1 |
9.1 |
0.0 |
17.8 |
Sunshine & showers |
|
28 |
8.8 |
15.9 |
6.1 |
90 |
99 |
15.0 |
15.7 |
15.9 |
0.0 |
7.8 |
14.9 |
43 |
6.4 |
154 |
19.0 |
1010 |
1018 |
294 |
2.6 |
0.2 |
0.0 |
17.5 |
Heavy showers all day, windy |
|
29 |
5.2 |
17.0 |
2.2 |
56 |
100 |
14.2 |
15.2 |
15.8 |
0.0 |
4.5 |
10.6 |
19 |
2.5 |
63 |
0.4 |
1012 |
1028 |
670 |
3.7 |
10.2 |
0.0 |
17.3 |
Sunny intervals all day |
|
30 |
6.2 |
16.9 |
2.8 |
87 |
99 |
14.0 |
14.5 |
15.6 |
0.0 |
5.3 |
15.5 |
34 |
8.7 |
200 |
0.0 |
1015 |
1028 |
227 |
2.0 |
0.2 |
0.0 |
17.1 |
Cloudy all day |
|
|
10.9 |
21.5 |
8.9 |
71 |
98 |
16.7 |
16.6 |
16.1 |
0.0 |
9.8 |
17.1 |
16 |
2.3 |
1630 |
55.4 |
1015 |
1021 |
609 |
4.5 |
171.6 |
0.0 |
17.9 |
|
 |
|
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|
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|
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|
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