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
65.1
65
February
94.6
95
March
90.3
90
April
May
June
July
August
September
October
November
100.0
100
December
85.8
86
Average
85.2
84.1
86.3
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
2.6
3
February
10.8
11
March
14.0
14
April
May
June
July
August
September
October
November
13.0
13
December
8.8
9
Average
9.0
9.1
8.9
Average highest temperature per day
The maximum temperature is typically observed some hours after noon.
Minimum temperatures (°C)
Month
Average
2024
2023
January
-4.4
-4
February
-1.9
0
March
3.6
4
April
May
June
July
August
September
October
November
0.0
0
December
1.7
2
Average
0.8
0.0
1.6
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
January
29.3
29
February
5.0
5
March
6.6
7
April
May
June
July
August
September
October
November
0.0
0
December
13.1
13
Average
12.8
12.9
12.7
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
6.9
7
February
6.6
7
March
7.8
8
April
May
June
July
August
September
October
November
11.5
12
December
6.4
6
Average
6.8
7.1
6.5
Average wind speed
Excluding wind gusts. Only observations between sunrise and sunset are taken into account.
Prevailing wind direction
Month
2024
2023
January
232°
February
231°
March
231°
April
May
June
July
August
September
October
November
215°
December
220°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.