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
76.6
77
February
91.9
92
March
79.1
79
April
May
June
July
August
September
October
November
December
82.2
82
Average
82.3
82.5
82.2
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
5.1
5
February
8.3
8
March
13.2
13
April
May
June
July
August
September
October
November
December
8.9
9
Average
8.9
8.9
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
-2.9
-1
February
-1.8
0
March
4.2
4
April
May
June
July
August
September
October
November
December
2.6
3
Average
1.8
1.0
2.6
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
January
14.2
14
February
5.2
5
March
11.6
12
April
May
June
July
August
September
October
November
December
5.5
6
Average
7.9
10.3
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
7.0
7
February
6.6
7
March
8.0
8
April
May
June
July
August
September
October
November
December
6.1
6
Average
6.7
7.2
6.1
Average wind speed
Excluding wind gusts. Only observations between sunrise and sunset are taken into account.
Prevailing wind direction
Month
2024
2023
January
304°
February
276°
March
310°
April
May
June
July
August
September
October
November
December
300°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.