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
January
79.7
80
February
92.0
92
March
97.0
97
April
May
June
92.4
93
July
96.6
97
August
96.9
97
September
99.1
99
October
95.7
96
November
93.6
94
December
74.5
75
Average
91.9
90.2
93.6
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
January
2.6
3
February
10.8
11
March
12.7
13
April
May
June
23.3
23
July
26.9
27
August
28.0
28
September
24.6
25
October
19.5
20
November
9.4
10
December
6.0
6
Average
14.1
8.7
19.5
Average highest temperature per day
The maximum temperature is typically observed some hours after noon.
Minimum temperatures (°C)
Month
Average
2024
2023
January
-7.3
-7
February
1.2
1
March
2.1
2
April
May
June
13.0
13
July
14.1
14
August
13.4
14
September
10.2
10
October
4.8
5
November
1.4
2
December
-2.2
-2
Average
3.2
-2.8
7.6
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
January
13.2
13
February
6.9
7
March
9.4
9
April
May
June
10.6
11
July
4.3
4
August
2.1
2
September
1.9
2
October
1.2
1
November
13.8
14
December
9.2
9
Average
7.6
9.8
5.5
Precipitation during daylight period
Percentage of observations with observed rain, drizzle, snow or hail. Only observations between sunrise and sunset are taken into account.
Wind speed (knots)
Month
Average
2024
2023
January
6.4
6
February
7.2
7
March
6.6
7
April
May
June
4.9
5
July
5.6
6
August
5.1
5
September
5.0
5
October
6.4
6
November
7.1
7
December
6.2
6
Average
6.2
6.7
5.7
Average wind speed
Excluding wind gusts. Only observations between sunrise and sunset are taken into account.
Prevailing wind direction
Month
2024
2023
January
283°
February
263°
March
284°
April
May
June
306°
July
290°
August
044°
September
095°
October
251°
November
262°
December
261°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.