Royston (Iceni) Weather Station
2000 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 hrs |
Mean Earth 30cms 21 hrs |
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 |
JAN |
7.6 |
13.4 |
29 |
3.4 |
13 |
3.0 |
9.5 |
31 |
-1.1 |
24 |
0.7 |
-5.6 |
25 |
4.7 |
4.3 |
4.5 |
5 |
14 |
19.5 |
25.4 |
14 |
5.9 |
3 |
35.0 |
86.8 |
7.5 |
27 |
5 |
FEB |
9.7 |
13.6 |
8 |
6.5 |
16 |
3.6 |
8.3 |
1 |
-1.0 |
20 |
1.1 |
-5.6 |
20 |
6.1 |
5.4 |
5.6 |
3 |
10 |
16.2 |
66.5 |
21 |
12.7 |
24 |
70.3 |
114.8 |
9.3 |
25 |
2 |
MAR |
11.6 |
16.5 |
8 |
6.5 |
29 |
4.5 |
10.5 |
8 9 |
-2.0 |
4 |
2.1 |
-5.6 |
4 |
7.2 |
7.8 |
8.2 |
1 |
9 |
7.3 |
11.3 |
9 |
4.3 |
2 |
19.4 |
120.4 |
11.0 |
12 |
5 |
APR |
12.8 |
19.2 |
29 |
4.9 |
4 |
4.9 |
10.0 |
20 |
-1.5 |
6 |
3.2 |
-4.9 |
6 |
8.2 |
9.7 |
10.2 |
2 |
8 |
11.0 |
94.4 |
23 |
17.9 |
2 |
121.3 |
141.3 |
12.5 |
6 |
4 |
MAY |
17.4 |
26.0 |
15 |
10.5 |
3 |
8.6 |
15.1 |
16 |
5.5 |
1 20 27 |
7.2 |
2.0 |
1 |
12.3 |
14.7 |
15.3 |
0 |
0 |
0.0 |
85.3 |
21 |
18.8 |
27 |
82.1 |
172.8 |
13.1 |
15 |
2 |
JUN |
20.7 |
32.0 |
19 |
15.7 |
5 |
11.9 |
17.0 |
19 |
7.8 |
7 |
10.1 |
5.0 |
7 |
16.0 |
17.7 |
18.4 |
0 |
0 |
0.0 |
19.7 |
6 |
6.9 |
6 |
14.3 |
183.8 |
15.6 |
18 |
1 |
JUL |
20.1 |
25.0 |
20 30 31 |
14.5 |
10 |
11.8 |
14.6 |
27 31 |
8.3 |
12 16 |
10.3 |
5.7 |
16 |
15.6 |
17.6 |
18.2 |
0 |
0 |
0.0 |
74.3 |
13 |
18.9 |
3 |
42.8 |
143.6 |
14.5 |
18 |
2 |
AUG |
23.1 |
27.4 |
12 |
19.8 |
18 |
13.3 |
17.1 |
10 14 | 9.3 |
24 |
11.4 |
6.6 |
30 |
17.7 |
18.8 |
19.4 |
0 |
0 |
0.0 |
43.3 |
10 |
17.8 |
20 |
26.3 |
209.9 |
13.2 |
12 |
0 |
SEP |
19.7 |
27.5 |
11 |
15.5 |
19 |
12.2 |
17.4 |
20 |
6.5 |
4 |
10.6 |
3.8 |
4 |
15.4 |
16.4 |
16.8 |
0 |
0 |
0.0 |
78.2 |
13 |
17.9 |
25 |
73.2 |
139.7 |
11.7 |
4 |
4 |
OCT |
13.9 |
18.5 |
1 |
9.8 |
30 |
8.4 |
12.1 |
4 |
5.0 |
9 |
6.6 |
2.6 |
20 |
10.5 |
12.0 |
12.1 |
0 |
0 |
0.0 |
137.7 |
23 |
34.3 |
20 |
97.8 |
100.9 |
9.0 |
1 |
5 |
NOV |
10.0 |
15.0 |
28 |
6.5 |
20 |
5.1 |
9.5 |
29 |
0.0 |
15 |
3.4 |
-3.1 |
15 |
6.9 |
7.5 |
7.6 |
0 |
3 |
0.0 |
118.2 |
20 |
22.6 |
5 |
111.3 |
84.6 |
7.4 |
1 |
6 |
DEC |
7.7 |
13.5 |
11 12 |
-1.1 |
29 |
4.3 |
12.3 |
12 |
-5.1 |
29 |
2.8 |
-8.5 |
29 |
5.5 |
6.7 |
6.7 |
6 |
9 |
110.2 |
66.7 |
20 |
12.1 |
7 |
96.0 |
63.6 |
6.8 |
3 |
11 |
YEAR |
14.5 |
X |
X |
X |
X |
7.6 |
X |
X |
X |
X |
5.8 |
X |
X |
10.5 |
11.6 |
11.9 |
17 |
53 |
164.2 |
821.0 |
193 |
X |
X |
789.8 |
1562.2 |
X |
X |
47 |
Part 2 Air Pressure, Wind Direction, Wind Speed, Humidity, Cloud Cover, Fog, Snow Falling, Snow Lying, Hail and Thunder
A i r P r e s s u r e (mb) |
Wind Direction 0900h (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 09h (oktas) |
Fog (visibility < 1000m @ 09hr) |
Fog (visibility < 200m @ 09hr) |
Snow or Rain and Snow |
Snow Lying (> 50% cover @ 09hr) |
Hail |
Thunder |
JAN |
1022.5 |
1041 |
16 |
994 |
29 |
2 |
1 |
0 |
0 |
4 |
10 |
7 |
6 |
1 |
5.8 |
46 |
28 29 |
89.5 |
5.6 |
1 |
0 |
2 |
0 |
1 |
0 |
FEB |
1016.8 |
1033 |
3 |
993 |
29 |
1 |
0 |
0 |
0 |
4 |
17 |
6 |
1 |
0 |
7.1 |
48 |
10 |
83.6 |
4.8 |
0 |
0 |
1 |
1 |
0 |
0 |
MAR |
1021.1 |
1038 |
19 |
998 |
3 |
5 |
2 |
0 |
1 |
1 |
7 |
8 |
6 |
1 |
5.4 |
58 |
3 |
81.0 |
5.6 |
1 |
0 |
0 |
0 |
0 |
0 |
APR |
1005.9 |
1035 |
7 |
981 |
12 |
3 |
6 |
0 |
0 |
10 |
6 |
2 |
2 |
1 |
3.9 |
48 |
17 |
83.6 |
5.3 |
0 |
0 |
1 |
0 |
2 |
0 |
MAY |
1014.4 |
1027 |
2 |
993 |
28 |
9 |
3 |
0 |
0 |
3 |
6 |
6 |
4 |
0 |
3.6 |
39 |
17 19 23 |
82.6 |
5.3 |
3 |
0 |
0 |
0 |
3 |
3 |
JUN |
1018.1 |
1028 |
16 |
1007 |
9 |
2 |
1 |
0 |
3 |
6 |
9 |
6 |
2 |
1 |
4.3 |
37 |
21 22 |
74.5 |
5.4 |
0 |
0 |
0 |
0 |
1 |
1 |
JUL |
1013.3 |
1026 |
21 |
989 |
10 |
7 |
7 |
0 |
0 |
3 |
2 |
7 |
5 |
0 |
2.8 |
30 |
9 10 11 |
78.3 |
6.2 |
0 |
0 |
0 |
0 |
0 |
3 |
AUG |
1016.0 |
1025 |
5 |
1002 |
31 |
1 |
3 |
0 |
1 |
2 |
9 |
8 |
6 |
1 |
3.3 |
32 |
2 |
74.4 |
4.0 |
0 |
0 |
0 |
0 |
1 |
2 |
SEP |
1010.4 |
1024 |
4 |
992 |
19 |
2 |
0 |
0 |
3 |
7 |
11 |
5 |
2 |
0 |
4.0 |
37 |
27 |
83.8 |
5.3 |
0 |
0 |
0 |
0 |
0 |
1 |
OCT |
1006.7 |
1025 |
6 21 |
962 |
11 |
0 |
0 |
0 |
1 |
7 |
12 |
8 |
2 |
1 |
5.5 |
62 |
30 |
87.2 |
5.7 |
2 |
0 |
0 |
0 |
0 |
0 |
NOV |
997.0 |
1013 |
10 |
970 |
6 |
0 |
1 |
1 |
3 |
6 |
14 |
4 |
1 |
0 |
6.2 |
46 |
5 22 |
90.6 |
5.4 |
0 |
0 |
0 |
0 |
0 |
1 |
DEC |
1004.4 |
1018 |
21 |
979 |
8 |
1 |
2 |
2 |
6 |
6 |
7 |
5 |
0 |
2 |
5.9 |
78 |
13 |
90.9 |
5.8 |
2 |
1 |
2 |
4 |
0 |
0 |
YEAR |
1012.2 |
X |
X |
X |
X |
33 |
26 |
3 |
18 |
59 |
110 |
72 |
37 |
8 |
4.8 |
X |
X |
83.3 |
5.4 |
9 |
1 |
6 |
5 |
8 |
11 |
Click on the links below to access the graphs and charts accompanying this summary
1. Monthly Mean Maximum & Minimum Temperatures 2. Monthly Temperature Extremes
3. Monthly Mean (30 cms depth) Earth Temperatures 4. Air & Ground Frosts 5. Rainfall
6. Rainfall Duration 7. Sunshine Duration 8. Rainfall/MSL Air Pressure
9. Mean Sea-Level Air Pressure 10. Wind Direction @ 0900 GMT
11. Monthly Maximum Gust & Mean Wind Speed 12. Monthly Mean Relative Humidity
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(This page last updated 13th January 2001 2244 GMT)