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
62.3
62
February
88.5
89
March
86.5
87
April
May
June
July
August
86.5
87
September
79.4
79
October
87.2
87
November
97.2
97
December
71.4
72
Average
82.1
79.9
84.2
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
3.4
3
February
6.4
6
March
11.1
11
April
May
June
July
August
25.8
26
September
23.9
24
October
19.3
19
November
10.4
10
December
7.9
8
Average
11.8
6.9
16.6
Average highest temperature per day
The maximum temperature is typically observed some hours after noon.
Minimum temperatures (°C)
Month
Average
2024
2023
January
-4.8
-3
February
-4.7
-3
March
2.2
2
April
May
June
July
August
17.4
18
September
14.2
14
October
8.8
9
November
-1.6
0
December
0.2
0
Average
2.9
-2.6
7.1
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
January
13.5
14
February
8.4
9
March
13.1
13
April
May
June
July
August
10.1
10
September
19.5
20
October
9.7
10
November
5.1
5
December
12.6
13
Average
11.8
11.7
11.8
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
3.5
4
February
5.5
6
March
6.3
6
April
May
June
July
August
4.1
4
September
4.2
4
October
3.6
4
November
4.4
4
December
3.7
4
Average
4.6
5.2
4.0
Average wind speed
Excluding wind gusts. Only observations between sunrise and sunset are taken into account.
Prevailing wind direction
Month
2024
2023
January
338°
February
314°
March
341°
April
May
June
July
August
046°
September
014°
October
277°
November
300°
December
315°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.