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
63.2
63
February
79.3
79
March
88.9
89
April
May
June
97.7
98
July
96.7
97
August
87.6
88
September
90.0
90
October
80.7
81
November
83.2
83
December
93.0
93
Average
83.3
77.8
88.9
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
-9.5
-9
February
0.2
0
March
0.1
0
April
May
June
26.7
27
July
25.9
26
August
25.8
26
September
22.8
23
October
10.6
11
November
2.7
3
December
1.2
1
Average
6.2
-3.2
15.1
Average highest temperature per day
The maximum temperature is typically observed some hours after noon.
Minimum temperatures (°C)
Month
Average
2024
2023
January
-16.3
-16
February
-9.7
-8
March
-10.5
-10
April
May
June
17.7
18
July
12.5
13
August
14.1
14
September
11.0
11
October
2.0
2
November
-6.0
-6
December
-9.7
-8
Average
-4.7
-12.8
4.5
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
January
29.4
30
February
12.6
13
March
14.1
14
April
May
June
0.0
0
July
2.3
2
August
6.9
7
September
6.0
6
October
16.4
16
November
6.9
7
December
4.2
4
Average
12.7
18.5
6.9
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
9.9
10
February
10.3
10
March
10.3
10
April
May
June
5.9
6
July
8.3
8
August
8.3
8
September
8.2
8
October
9.4
9
November
9.9
10
December
7.9
8
Average
9.4
10.2
8.6
Average wind speed
Excluding wind gusts. Only observations between sunrise and sunset are taken into account.
Prevailing wind direction
Month
2024
2023
January
302°
February
324°
March
345°
April
May
June
295°
July
305°
August
334°
September
111°
October
351°
November
303°
December
025°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.