Example climate estimate

Llanfairpwlligwyngll
Climate estimates (1961-90)
National Grid Reference: 2530E 3710N
Lat: 53 deg 12 min 55 sec N
Long: 4 deg 12 min 6 sec W
Altitude: 15 metres above mean sea level
 
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Year
Max temp °C
7.7
8.0
9.7
12.1
15.2
17.9
19.4
19.3
17.4
14.6
10.5
8.7
13.4
Min temp °C
2.6
2.2
3. 4
4.9
7.4
10.1
11.9
11.9
10.4
8.3
5.0
3.5
6.8
Mean temp °C
5.2
5.1
6.6
8.5
11.3
14.0
15.7
15.6
13.9
11.5
7.8
6.1
10.1
Temp range °C
5.1
5.7
6.3
7.2
7.8
7.8
7.5
7.4
6.9
6.3
5.4
5.2
6.6
Highest max °C
16
17
22
24
28
29
31
34
27
25
18
17
34
Lowest min °C
-9
-8
-7
-3
-1
2
5
4
1
-1
-4
-8
-9
Lowest max °C
-3
-1
1
4
7
10
12
13
10
7
2
-1
-3
Highest min °C
12
11
12
12
16
18
20
20
17
18
13
12
20
Grass min °C
-0.6
1.2
-0.2
0.9
3.5
6.8
8.9
8.9
7.0
4.8
1.5
0.1
3.4
30 cm soil temp °C
4.9
4.8
6.1
8.8
12.1
15.1
16.8
16.7
15.0
12.1
8.5
6.1
10.6
Sunshine hr/day
1.6
2.6
3.4
5.1
6.3
6.1
5.6
5.3
4.2
3.0
1.9
1.3
3.87
Rainfall mm
107
72
85
65
65
68
74
95
98
120
130
123
1102
Wind at 10 m knots
11.6
10.5
11.1
9.5
9.3
9.0
8.8
8.9
9.9
10.4
10.8
11.2
10.1
Min hourly RH %
79
76
73
69
67
68
70
71
73
75
78
80
73
Max hourly RH %
88
88
88
88
89
91
91
92
91
90
89
89
89
Air frost days
5.8
5.9
2.2
0.9
0.0
0.0
0.0
0.0
0.0
0.1
1.8
4 4
21
Grass frost days
17.1
16.9
15.3
12.5
6.0
1.2
0.2
0.1
1.3
4.7
12.2
15.9
104
>=10 mm rain days
2.5
1.7
2.0
1.5
1.2
1.6
2.2
2.7
2.8
3.4
3.8
3.5
29
>=1 mm rain days
15.6
11.2
13.0
10.4
10.9
10.3
9.5
11.7
12.3
15.0
15.7
15.1
151
>=0.2 mm rain days
19.7
15.0
17.4
14.1
14.9
13.7
13.1
15.1
15.8
18.7
19.5
19.5
197
Snow falling days
2.9
3.1
1. 7
0.7
0.1
0.0
0.0
0.0
0.0
0.0
0.4
1.6
10
Sleet/snow fall days
4.6
4.5
3.4
1.5
0.2
0.0
0.0
0.0
0.0
0..0
1.0
2.9
18
Snow lying days
1.0
0.7
0.4
0.1
0.0
0.0
0.0
0.0
0.0
0.0
0.2
0.5
2.8
Hail days
1.7
1.2
1.6
1.1
0.8
0.2
0.0
0.1
0.2
1.0
1.8
1.4
11
Thunder heard days
0.2
0.2
0.3
0.4
1.4
1.3
1.2
1.2
0.7
0.6
0.4
0.3
8.3

Notes

These estimates of 30-year averages are interpolated from values on a regular grid derived from station observations. Where relevant and possible the effects of altitude, urban areas and proximity to the coast are taken into account.

Local effects are not taken into account in producing these estimates. As a general rule this makes them less accurate in mountainous areas. In particular, days of thunder, hail, snow falling and snow lying may be unreliable in data-sparse areas such as central and northern Scotland.

Estimates are available for 1961-1990 for all the climate variables shown in the example.

Estimates are also available for 1971-2000 for most of the climate variables. However, Highest max °C, Lowest min °C, Lowest max °C, Highest min °C, Min hourly RH %, Max hourly RH % will not be included.