Percentage of observations where the VFR minimums for ceiling and visibility are met: visibility of 8 km or more and a ceiling of 3,000 ft or more. Only observations between sunrise and sunset are taken into account.
Marginal VFR conditions (%)
Month
Average
2024
2023
2022
2021
2020
January
69.5
58
71
79
75
73
February
61.1
47
70
71
65
70
March
59.9
61
48
64
57
69
April
59.8
91
59
72
37
May
53.4
68
49
49
June
68.5
70
62
77
July
62.1
51
59
70
August
71.0
63
71
74
September
78.1
61
76
92
October
83.2
83
84
80
November
77.9
68
74
81
December
63.9
78
53
80
Average
64.6
55.2
61.8
65.4
65.3
69.0
Marginal VFR conditions or better during daylight period
Percentage of observations where the MVFR minimums for ceiling and visibility are met: visibility of 5 km or more and a ceiling of 1,000 ft or more. Only observations between sunrise and sunset are taken into account.
Maximum temperatures (°C)
Month
Average
2024
2023
2022
2021
2020
January
-12.6
-10
-15
-16
-13
-13
February
-11.7
-11
-12
-13
-16
-16
March
-6.8
-8
-8
-1
-8
-5
April
-2.7
-10
0
-3
-2
May
1.7
1
1
3
June
7.6
8
7
8
July
11.1
10
11
11
August
10.2
10
10
11
September
8.1
8
7
8
October
3.7
2
1
5
November
-1.4
-1
-5
1
December
-6.7
-2
-8
-5
Average
-3.6
-10.5
-12.0
0.7
-2.8
0.5
Average highest temperature per day
The maximum temperature is typically observed some hours after noon.