Royston (Iceni) Weather Station
2012 Annual Summary
Part 1 Temperature, Rainfall & Sunshine
|
T e m p e r a t u r e (°C) |
|
Rainfall (mm) |
Sunshine (Hours) |
||||||||||||||||||||||||||
|
MONTH |
Mean Maximum |
Highest Maximum |
Date(s) |
Lowest Maximum |
Date(s) |
Mean Minimum |
Highest Minimum |
Date(s) |
Lowest Minimum |
Date(s) |
Mean Grass Minimum |
Lowest Grass Minimum |
Date(s) |
Mean Dry Bulb (5 min. obs.) |
Mean Earth 30cms 09 GMT |
Mean Earth 30cms 21 GMT |
No. of Air Frosts |
No. of Ground Frosts |
Air Frost Duration (Hours) |
Total |
No. of Days with 0.2mm or more |
Most in a Day |
Date(s) |
Rainfall Duration (Hours) |
Total |
Highest |
Date(s) |
No. of Days no sun |
MONTH |
|
JAN |
8.7 |
12.1 |
3 |
1.8 |
31 |
3.7 |
10.9 |
1 |
-3.1 |
14 |
1.4 |
-7.3 |
14 |
5.5 |
5.7 |
5.9 |
5 |
13 |
43.6 |
42.8 |
16 |
12.4 |
18 |
X |
78.7 |
7.1 |
27 |
5 |
JAN |
|
FEB |
7.1 |
16.9 |
23 |
-0.3 |
4 |
0.9 |
10.3 |
23 |
-11.5 |
11 |
-1.5 |
-15.3 |
11 |
3.6 |
3.8 |
4.0 |
12 |
17 |
200.3 |
22.3 |
9 |
13.0 |
4 |
X |
106.1 |
9.3 |
23 |
7 |
FEB |
|
MAR |
13.6 |
21.6 |
28 |
7.5 |
5 |
4.0 |
7.5 |
10 |
0.5 |
26 |
1.1 |
-3.2 |
26 |
8.2 |
7.7 |
8.3 |
0 |
10 |
0.0 |
20.5 |
7 |
14.0 |
4 |
X |
188.0 |
12.2 |
27 |
4 |
MAR |
|
APR |
13.0 |
18.3 |
30 |
8.0 |
28 |
4.2 |
8.1 |
26 27 |
-2.1 |
6 |
2.0 |
-7.0 |
6 |
7.7 |
9.5 |
10.2 |
3 |
8 |
16.4 |
113.1 |
22 |
26.2 |
28 |
X |
143.1 |
12.3 |
1 |
2 |
APR |
|
MAY |
17.2 |
26.9 |
28 |
8.0 |
3 |
8.3 |
13.6 |
10 |
2.0 |
7 |
7.0 |
-1.6 |
7 |
12.2 |
13.2 |
14.0 |
0 |
1 |
0.0 |
65.0 |
13 |
28.4 |
2 |
X |
156.0 |
15.7 |
27 |
2 |
MAY |
|
JUN |
18.7 |
28.3 |
28 |
10.7 |
3 |
10.7 |
17.1 |
27 |
5.4 |
13 |
9.4 |
2.7 |
13 |
14.2 |
16.0 |
16.8 |
0 |
0 |
0.0 |
125.1 |
19 |
24.3 |
10 |
X |
152.6 |
12.2 |
19 |
2 |
JUN |
|
JUL |
21.1 |
29.7 |
25 |
15.7 |
14 |
12.5 |
15.8 |
5 |
8.7 |
21 |
11.1 |
6.5 |
21 |
16.1 |
18.3 |
19.1 |
0 |
0 |
0.0 |
136.4 |
21 |
33.7 |
13 |
X |
177.4 |
15.2 |
23 |
0 |
JUL |
|
AUG |
23.1 |
31.4 |
18 |
16.1 |
30 |
13.5 |
19.3 |
18 |
4.7 |
31 |
11.5 |
2.0 |
31 |
17.5 |
18.9 |
19.7 |
0 |
0 |
0.0 |
29.1 |
15 |
7.6 |
29 |
X |
197.0 |
13.6 |
10 |
0 |
AUG |
|
SEP |
19.7 |
28.5 |
9 |
13.2 |
23 |
9.7 |
15.0 |
10 |
3.2 |
22 |
7.5 |
0.8 |
22 |
13.9 |
15.6 |
16.3 |
0 |
0 |
0.0 |
27.6 |
8 |
14.5 |
23 |
X |
189.7 |
12.5 |
6 |
0 |
SEP |
|
OCT |
13.7 |
17.5 |
1, 2 |
7.7 |
27 |
7.4 |
13.1 |
1 |
0.9 |
27 |
5.2 |
-2.1 |
28 |
9.9 |
11.7 |
12.0 |
0 |
4 |
0.0 |
85.6 |
22 |
15.3 |
5 |
X |
109.3 |
9.4 |
6 |
1 |
OCT |
|
NOV |
9.9 |
15.1 |
13 |
3.8 |
30 |
4.9 |
9.9 |
20 |
-1.5 |
30 |
2.7 |
-6.0 |
30 |
6.9 |
8.0 |
8.1 |
1 |
8 |
16.0 |
71.4 |
16 |
13.1 |
24 |
X |
89.5 |
7.5 |
11 |
6 |
NOV |
|
DEC |
7.8 |
13.1 |
22 |
-0.2 |
11 |
2.8 |
10.7 |
23 |
-7.0 |
12 |
0.5 |
-9.6 |
12 |
4.8 |
5.0 |
5.5 |
7 |
14 |
102.2 |
97.7 |
20 |
18.5 |
19 |
X |
64.9 |
6.7 |
2 |
9 |
DEC |
|
YEAR |
14.5 |
X |
X |
X |
X |
6.9 |
X |
X |
X |
X |
4.8 |
X |
X |
10.0 |
11.1 |
11.7 |
28 |
75 |
378.5 |
836.6 |
188 |
X |
X |
X |
1652.3 |
X |
X |
38 |
YEAR |
Part 2 Air Pressure, Wind Direction, Wind Speed, Humidity, Cloud Cover, Fog, Snow Falling, Snow Lying, Hail & Thunder
|
P r e s s u r e (mb) |
Wind Direction 0900 GMT (No. of Days) |
Wind Speed (MPH) |
Humidity |
Cloud |
No of Days With: |
|||||||||||||||||||||
|
MONTH |
Mean MSL Pressure |
Highest |
Date(s) |
Lowest |
Date(s) |
N |
NE |
E |
SE |
S |
SW |
W |
NW |
CALM |
Mean Wind Speed |
Maximum Gust |
Date |
Mean Relative Humidity (5 min.obs.) |
Mean Cloud Cover 09 GMT (oktas) |
Fog (visibility < 1000m @ 09 GMT) |
Fog (visibility < 200m @ 09 GMT) |
Snow or Rain and Snow |
Snow Lying (> 50% cover @ 09 GMT) |
Hail |
Thunder |
MONTH |
|
JAN |
1019.8 |
1033.5 |
13 |
991.9 |
3 |
2 |
0 |
2 |
2 |
5 |
10 |
7 |
2 |
1 |
8.0 |
51 |
3 |
86.5 |
5.8 |
1 |
1 |
1 |
0 |
0 |
0 |
JAN |
|
FEB |
1028.9 |
1043.8 |
7 |
1005.6 |
18 |
0 |
4 |
0 |
2 |
4 |
8 |
5 |
6 |
0 |
6.0 |
40 |
18 |
85.0 |
4.9 |
1 |
0 |
4 |
9 |
0 |
0 |
FEB |
|
MAR |
1027.1 |
1037.7 |
27 |
1009.0 |
7 |
2 |
2 |
3 |
5 |
3 |
3 |
8 |
5 |
0 |
5.0 |
34 |
7 |
80.9 |
5.0 |
5 |
2 |
0 |
0 |
0 |
0 |
MAR |
|
APR |
1003.5 |
1026.7 |
16 |
976.9 |
18 |
1 |
6 |
0 |
3 |
3 |
4 |
7 |
6 |
0 |
6.4 |
38 |
26 |
82.5 |
4.6 |
0 |
0 |
0 |
0 |
4 |
2 |
APR |
|
MAY |
1016.1 |
1038.1 |
12 |
1003.1 |
18 |
5 |
10 |
1 |
1 |
2 |
4 |
2 |
6 |
0 |
5.2 |
42 |
10 |
82.3 |
5.7 |
2 |
0 |
0 |
0 |
1 |
2 |
MAY |
|
JUN |
1010.4 |
1019.8 |
26 |
990.7 |
8 |
2 |
2 |
2 |
4 |
5 |
11 |
2 |
2 |
0 |
6.9 |
39 |
8 |
81.0 |
5.8 |
0 |
0 |
0 |
0 |
0 |
0 |
JUN |
|
JUL |
1012.5 |
1026.6 |
22 |
998.2 |
13 |
2 |
3 |
0 |
1 |
5 |
7 |
10 |
3 |
0 |
5.7 |
34 |
16 |
81.6 |
5.2 |
0 |
0 |
0 |
0 |
0 |
1 |
JUL |
|
AUG |
1013.2 |
1029.3 |
31 |
998.0 |
25 |
1 |
1 |
2 |
2 |
8 |
9 |
7 |
1 |
0 |
5.7 |
29 |
15 |
78.5 |
5.1 |
0 |
0 |
0 |
0 |
0 |
2 |
AUG |
|
SEP |
1013.7 |
1029.1 |
6 |
983.7 |
24 |
1 |
1 |
1 |
1 |
3 |
6 |
14 |
3 |
0 |
6.6 |
38 |
24 |
77.1 |
4.2 |
0 |
0 |
0 |
0 |
0 |
0 |
SEP |
|
OCT |
1009.1 |
1024.1 |
23 |
977.0 |
31 |
2 |
3 |
1 |
4 |
4 |
7 |
7 |
2 |
1 |
5.7 |
39 |
16 |
89.4 |
5.4 |
4 |
3 |
1 |
0 |
0 |
0 |
OCT |
|
NOV |
1008.3 |
1026.9 |
13, 14 |
974.6 |
1 |
1 |
1 |
1 |
3 |
12 |
5 |
5 |
2 |
0 |
6.7 |
46 |
25 |
90.9 |
5.1 |
1 |
1 |
0 |
0 |
0 |
0 |
NOV |
|
DEC |
1006.6 |
1030.7 |
11 |
973.1 |
14 |
1 |
0 |
0 |
5 |
7 |
8 |
7 |
3 |
0 |
8.5 |
43 |
14 |
91.0 |
5.5 |
1 |
1 |
2 |
2 |
0 |
0 |
DEC |
|
YEAR |
1014.1 |
X |
X |
X |
X |
20 |
33 |
13 |
33 |
61 |
82 |
81 |
41 |
2 |
6.4 |
X |
X |
83.9 |
5.2 |
15 |
8 |
8 |
11 |
5 |
7 |
YEAR |
Click on the links below to access the graphs and charts representing the data in the above tables.........
1. Monthly Mean Maximum & Minimum Temperatures 2. Monthly Temperature Extremes
3. Monthly Mean Earth (30 cms Depth) Temperature 4. Monthly Frequency of Air & Ground Frost, and Air Frost Duration
5. Monthly Rainfall 6. Monthly Rainfall Duration 7. Monthly Sunshine Duration
8. Monthly Rainfall & Mean MSL Air Pressure 9. Monthly Mean, Highest and Lowest MSL Air Pressure
10. Monthly Wind Direction Frequency @ 0900 GMT
11. Monthly Maximum Gust & Mean Wind Speed 12. Monthly Mean Relative Humidity
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(This page last updated 16th January 2013 2123 GMT)