Royston (Iceni) Weather Station
2004 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 |
7.7 |
12.0 |
31 |
3.1 |
29 |
3.3 |
10.1 |
11 |
-4.5 |
29 |
1.7 |
-8.3 |
29 |
4.9 |
5.0 |
5.1 |
5 |
10 |
68.2 |
82.1 |
25 |
10.0 |
14 |
109.7 |
57.1 |
7.7 |
29 |
10 |
JAN |
|
FEB |
8.0 |
16.4 |
4 |
2.4 |
28 |
3.2 |
12.0 |
4 |
-4.0 |
26 |
1.3 |
-6.1 |
26 |
5.0 |
5.8 |
5.9 |
11 |
13 |
95.8 |
39.0 |
11 |
14.3 |
5 |
46.3 |
69.1 |
8.8 |
25 |
7 |
FEB |
|
MAR |
10.5 |
18.5 |
31 |
4.8 |
11 |
3.6 |
11.0 |
16 |
-3.7 |
1 |
1.7 |
-7.8 |
1 |
6.3 |
6.1 |
6.6 |
5 |
12 |
19.0 |
28.2 |
13 |
7.3 |
12 |
31.8 |
102.5 |
10.2 |
30 |
4 |
MAR |
|
APR |
14.6 |
21.7 |
24 |
9.0 |
29 |
6.0 |
9.7 |
28 |
1.2 |
11 |
4.0 |
-2.6 |
11 |
9.6 |
10.5 |
11.1 |
0 |
2 |
0.0 |
71.2 |
15 |
15.1 |
27 |
71.7 |
144.9 |
13.5 |
24 |
5 |
APR |
|
MAY |
17.4 |
24.0 |
17 |
11.8 |
3 |
8.6 |
12.4 |
20 |
2.4 |
22 |
6.5 |
0.0 |
22 |
12.5 |
14.3 |
15.1 |
0 |
0 |
0.0 |
53.3 |
12 |
20.7 |
7 |
45.1 |
176.7 |
14.0 |
19 |
3 |
MAY |
|
JUN |
21.5 |
30.7 |
8 |
15.5 |
1 |
12.1 |
16.6 |
8 |
5.5 |
19 |
10.2 |
3.2 |
19 |
16.3 |
18.1 |
19.0 |
0 |
0 |
0.0 |
25.6 |
9 |
9.3 |
22 |
30.4 |
200.8 |
15.2 |
7 |
1 |
JUN |
|
JUL |
21.9 |
27.9 |
29 |
16.7 |
9 |
12.5 |
16.3 |
16 |
8.4 |
7 |
10.6 |
5.4 |
7 |
16.7 |
18.4 |
19.1 |
0 |
0 |
0.0 |
103.9 |
15 |
38.0 |
7 |
39.0 |
186.8 |
15.0 |
6 |
0 |
JUL |
|
AUG |
23.5 |
30.5 |
7 |
18.3 |
29 |
14.4 |
21.1 |
9 |
8.9 |
21 |
12.5 |
6.7 |
31 |
18.2 |
19.8 |
20.4 |
0 |
0 |
0.0 |
57.0 |
19 |
15.5 |
9 |
49.2 |
198.3 |
12.5 |
7 |
0 |
AUG |
|
SEP |
20.6 |
28.5 |
5 |
14.2 |
24 |
11.7 |
15.8 |
11 |
5.9 |
24 |
9.6 |
2.1 |
16 |
15.4 |
16.7 |
17.1 |
0 |
0 |
0.0 |
16.0 |
12 |
3.9 |
30 |
22.9 |
178.4 |
12.4 |
4 |
1 |
SEP |
|
OCT |
14.7 |
17.3 |
24 |
10.0 |
15 |
8.2 |
13.9 |
23 |
4.1 |
9 |
6.0 |
0.2 |
27 |
10.7 |
12.4 |
12.5 |
0 |
0 |
0.0 |
69.4 |
15 |
11.0 |
3 |
73.9 |
108.7 |
8.8 |
21 |
3 |
OCT |
|
NOV |
10.2 |
14.2 |
3 |
3.9 |
20 |
5.7 |
10.4 |
17 |
-1.0 |
20 |
3.9 |
-6.1 |
20 |
7.4 |
9.2 |
9.3 |
3 |
8 |
21.7 |
57.2 |
15 |
28.3 |
18 |
76.8 |
70.5 |
7.7 |
13 |
10 |
NOV |
|
DEC |
8.1 |
12.7 |
23 |
3.1 |
26 |
3.4 |
9.6 |
23 |
-2.1 |
26 |
1.3 |
-6.1 |
20 |
5.3 |
6.3 |
6.4 |
6 |
13 |
50.4 |
27.3 |
7 |
9.7 |
21 |
31.4 |
69.5 |
6.3 |
28 |
8 |
DEC |
|
YEAR |
14.9 |
X |
X |
X |
X |
7.7 |
X |
X |
X |
X |
5.8 |
X |
X |
10.7 |
11.9 |
12.3 |
30 |
58 |
255.1 |
630.2 |
168 |
X |
X |
628.2 |
1563.3 |
X |
X |
52 |
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 09GMT (oktas) |
Fog (visibility < 1000m @ 09GMT) |
Fog (visibility < 200m @ 09GMT) |
Snow or Rain and Snow |
Snow Lying (> 50% cover @ 09GMT) |
Hail |
Thunder |
Month |
|
JAN |
1007.8 |
1029 |
18 |
981 |
13 |
1 |
2 |
0 |
1 |
7 |
8 |
9 |
2 |
1 |
5.6 |
67 |
31 |
91.0 |
5.7 |
0 |
0 |
2 |
3 |
0 |
1 |
JAN |
|
FEB |
1020.9 |
1037 |
9 |
998 |
27 |
4 |
3 |
0 |
0 |
0 |
9 |
3 |
9 |
1 |
4.6 |
48 |
8 |
85.8 |
5.8 |
0 |
0 |
7 |
3 |
1 |
0 |
FEB |
|
MAR |
1020.1 |
1039 |
1 |
997 |
20 |
4 |
4 |
1 |
2 |
5 |
8 |
4 |
1 |
2 |
4.0 |
71 |
20 |
83.9 |
6.0 |
1 |
1 |
3 |
0 |
6 |
1 |
MAR |
|
APR |
1012.7 |
1029 |
24 |
975 |
18 |
6 |
0 |
0 |
3 |
8 |
4 |
2 |
6 |
1 |
3.1 |
41 |
3,4 |
80.6 |
5.3 |
0 |
0 |
0 |
0 |
4 |
0 |
APR |
|
MAY |
1016.6 |
1033 |
23 |
976 |
4 |
7 |
4 |
1 |
0 |
4 |
3 |
3 |
9 |
0 |
1.4 |
35 |
4 |
78.2 |
4.9 |
0 |
0 |
0 |
0 |
0 |
2 |
MAY |
|
JUN |
1017.0 |
1034 |
13 |
989 |
23 |
0 |
0 |
0 |
1 |
4 |
5 |
13 |
7 |
0 |
3.7 |
46 |
23 |
72.5 |
4.6 |
0 |
0 |
0 |
0 |
1 |
1 |
JUN |
|
JUL |
1015.3 |
1027 |
24 |
1005 |
8 |
0 |
2 |
0 |
2 |
4 |
6 |
15 |
2 |
0 |
2.5 |
37 |
3 7 |
75.6 |
5.5 |
0 |
0 |
0 |
0 |
0 |
3 |
JUL |
|
AUG |
1009.7 |
1023 |
1 |
993 |
19 |
1 |
2 |
1 |
3 |
2 |
11 |
7 |
3 |
1 |
2.5 |
32 |
19,30 |
78.2 |
4.8 |
0 |
0 |
0 |
0 |
0 |
5 |
AUG |
|
SEP |
1017.9 |
1036 |
8 |
997 |
14 |
0 |
5 |
0 |
0 |
3 |
10 |
9 |
2 |
1 |
4.5 |
44 |
11,14 |
77.1 |
4.1 |
0 |
0 |
0 |
0 |
0 |
0 |
SEP |
|
OCT |
1006.2 |
1025 |
31 |
985 |
20 |
0 |
5 |
0 |
4 |
3 |
10 |
5 |
1 |
3 |
3.7 |
53 |
21 |
88.4 |
5.9 |
2 |
0 |
0 |
0 |
0 |
0 |
OCT |
|
NOV |
1022.1 |
1038 |
14 |
1005 |
18 |
2 |
2 |
0 |
2 |
4 |
7 |
10 |
2 |
1 |
2.4 |
37 |
17 |
90.6 |
5.3 |
0 |
0 |
1 |
2 |
0 |
0 |
NOV |
|
DEC |
1018.9 |
1033 |
8 |
990 |
17 |
1 |
1 |
2 |
1 |
4 |
15 |
5 |
1 |
1 |
3.3 |
41 |
22 |
90.5 |
5.0 |
2 |
1 |
0 |
0 |
0 |
0 |
DEC |
|
YEAR |
1015.4 |
X |
X |
X |
X |
26 |
30 |
5 |
19 |
48 |
96 |
85 |
45 |
12 |
3.4 |
X |
X |
82.7 |
5.2 |
5 |
2 |
13 |
8 |
12 |
13 |
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 14th January 2005 2105 GMT)