|
SHANNON AIRPORT
|
|
monthly and annual mean and extreme values
|
|
1961-1990
|
|
TEMPERATURE (degrees Celsius) |
jan
|
feb
|
mar
|
apr
|
may
|
jun
|
jul
|
aug
|
sep
|
oct
|
nov
|
dec
|
year
|
|
mean daily max.
|
8.2 |
8.5 |
10.5 |
12.7 |
15.3 |
17.9 |
19.4 |
19.2 |
17.2 |
14.2 |
10.4 |
8.9 |
13.5
|
|
mean daily min.
|
2.6 |
2.7 |
3.6 |
4.8 |
7.3 |
10.1 |
12.0 |
11.7 |
10.1 |
8.0 |
4.5 |
3.6 |
6.8
|
|
mean
|
5.4 |
5.6 |
7.0 |
8.8 |
11.3 |
14.0 |
15.7 |
15.5 |
13.6 |
11.1 |
7.5 |
6.3 |
10.1
|
|
absolute max.
|
14.0 |
14.8 |
20.2 |
22.2 |
25.6 |
31.6 |
30.6 |
28.7 |
25.5 |
21.8 |
18.2 |
15.2 |
31.6
|
|
absolute min.
|
-11.2 |
-9.8 |
-7.8 |
-4.1 |
-0.9 |
1.5 |
5.2 |
2.9 |
1.3 |
-1.4 |
-6.1 |
-8.3 |
-11.2
|
|
mean no. of days with air frost
|
6.5 |
5.4 |
3.2 |
1.6 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
0.3 |
3.5 |
5.0 |
25.4
|
|
mean no. of days with ground frost
|
13.2 |
11.0 |
9.5 |
8.2 |
2.5 |
0.4 |
0.0 |
0.0 |
0.6 |
2.7 |
9.6 |
11.0 |
68.6
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
RELATIVE HUMIDITY (%) |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
mean at 0900UTC
|
88 |
87 |
85 |
81 |
77 |
79 |
81 |
83 |
85 |
88 |
88 |
89 |
84
|
|
mean at 1500UTC
|
82 |
75 |
70 |
65 |
64 |
67 |
68 |
69 |
71 |
77 |
81 |
84 |
73
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
SUNSHINE (hours) |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
mean daily duration
|
1.58 |
2.34 |
3.34 |
4.93 |
5.77 |
5.13 |
4.59 |
4.44 |
3.69 |
2.65 |
1.93 |
1.42 |
3.48
|
|
greatest daily duration
|
7.8 |
9.5 |
11.6 |
13.6 |
15.3 |
15.8 |
15.7 |
14.8 |
11.6 |
9.9 |
8.8 |
7.1 |
15.8
|
|
mean no. of days with no sun
|
10 |
7 |
5 |
3 |
2 |
2 |
2 |
2 |
3 |
6 |
8 |
11 |
62
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
RAINFALL (mm) |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
mean monthly total
|
97.8 |
71.5 |
71.4 |
55.7 |
59.5 |
62.8 |
56.8 |
82.4 |
81.6 |
93.4 |
94.8 |
99 |
926.7
|
|
greatest daily total
|
29.0 |
33.5 |
28.5 |
29.6 |
27.0 |
29.7 |
42.5 |
35.9 |
35.5 |
33.0 |
33.0 |
50.4 |
50.4
|
|
mean no. of days with >= 0.2mm
|
20 |
16 |
19 |
16 |
17 |
16 |
15 |
18 |
18 |
20 |
19 |
20 |
214
|
|
mean no. of days with >= 1.0mm
|
16 |
12 |
14 |
11 |
13 |
11 |
10 |
13 |
13 |
15 |
15 |
16 |
160
|
|
mean no. of days with >= 5.0mm
|
7 |
5 |
5 |
4 |
4 |
4 |
4 |
5 |
6 |
6 |
7 |
7 |
66
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
WIND (knots) |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
mean monthly speed
|
10.9 |
11.1 |
11.0 |
9.5 |
9.5 |
8.9 |
8.7 |
8.6 |
9.6 |
10.0 |
9.6 |
10.5 |
9.8
|
|
max. gust
|
82 |
80 |
65 |
62 |
61 |
57 |
52 |
55 |
93 |
84 |
64 |
81 |
93
|
|
max. mean 10-minute speed
|
55 |
53 |
44 |
41 |
39 |
42 |
33 |
39 |
60 |
57 |
45 |
51 |
60
|
|
mean no. of days with gales
|
2.1 |
1.2 |
1.4 |
0.5 |
0.5 |
0.1 |
0.0 |
0.1 |
0.6 |
0.9 |
1.0 |
1.5 |
9.8
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
WEATHER (mean no. of days with...) |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
snow or sleet
|
3.4 |
3.2 |
1.8 |
0.6 |
0.1 |
0.0 |
0.0 |
0.0 |
0.0 |
0.1 |
0.3 |
1.5 |
10.9
|
|
snow lying at 0900UTC
|
0.8 |
0.7 |
0.1 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
0.1 |
0.3 |
2.0
|
|
hail
|
3.7 |
3.1 |
4.3 |
2.5 |
1.7 |
0.2 |
0.1 |
0.2 |
0.3 |
1.1 |
1.8 |
2.7 |
21.7
|
|
thunder
|
0.9 |
0.5 |
0.4 |
0.3 |
0.4 |
0.8 |
0.8 |
0.5 |
0.4 |
0.4 |
0.4 |
0.4 |
6.3
|
|
fog
|
4.1 |
2.0 |
1.8 |
2.2 |
1.7 |
1.8 |
1.7 |
3.1 |
3.0 |
3.3 |
3.4 |
3.6 |
31.8
|
