Percentage of observations where the VFR minimums for ceiling and visibility are met: visibility of 5 mi 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
92.5
93
February
80.2
80
March
83.9
84
April
May
June
July
August
September
84.2
84
October
85.0
85
November
97.9
98
December
98.4
99
Average
88.9
84.6
93.1
Marginal VFR conditions or better during daylight period
Percentage of observations where the MVFR minimums for ceiling and visibility are met: visibility of 3⅛ mi 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
-1.2
-1
February
1.2
1
March
4.9
5
April
May
June
July
August
September
14.0
14
October
12.5
13
November
8.6
9
December
8.4
8
Average
6.0
2.0
9.9
Average highest temperature per day
The maximum temperature is typically observed some hours after noon.
Minimum temperatures (°C)
Month
Average
2024
2023
January
-13.7
-12
February
-9.5
-8
March
-7.0
-7
April
May
June
July
August
September
7.5
8
October
0.8
1
November
-3.5
-3
December
-5.0
-5
Average
-6.5
-9.1
-3.9
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
January
12.6
13
February
19.0
19
March
11.4
12
April
May
June
July
August
September
26.3
26
October
9.4
10
November
3.3
3
December
0.0
0
Average
9.7
14.4
5.0
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
9.6
10
February
7.9
8
March
8.0
8
April
May
June
July
August
September
11.2
11
October
8.0
8
November
8.7
9
December
8.2
8
Average
8.3
8.3
8.3
Average wind speed
Excluding wind gusts. Only observations between sunrise and sunset are taken into account.
Prevailing wind direction
Month
2024
2023
January
294°
February
296°
March
338°
April
May
June
July
August
September
341°
October
305°
November
261°
December
242°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.