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
2022
2021
2020
January
0.0
0
0
0
0
0
February
0.0
0
0
0
0
0
March
0.0
0
0
0
0
0
April
0.0
0
0
0
0
0
May
0.0
0
0
0
0
0
June
0.0
0
0
0
0
0
July
0.0
0
0
0
0
0
August
0.0
0
0
0
0
0
September
0.0
0
0
0
0
October
0.0
0
0
0
0
November
0.0
0
0
0
0
December
0.0
0
0
0
0
Average
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
2022
2021
2020
January
-22.2
-22
-19
-26
-16
-21
February
-24.0
-19
-26
-27
-22
-22
March
-16.6
-15
-20
-16
-15
-17
April
-7.5
-2
-5
-7
-9
-9
May
3.2
8
13
2
1
-2
June
14.9
14
18
15
13
13
July
18.4
9
22
20
20
20
August
15.4
5
22
17
17
17
September
9.7
15
12
10
6
October
-1.9
4
2
4
-4
November
-14.7
-11
-12
-9
-16
December
-20.9
-11
-22
-22
-20
Average
-4.3
-3.4
0.4
-3.5
-3.9
-5.7
Average highest temperature per day
The maximum temperature is typically observed some hours after noon.
Minimum temperatures (°C)
Month
Average
2024
2023
2022
2021
2020
January
-29.3
-29
-26
-33
-25
-26
February
-32.2
-27
-34
-34
-31
-31
March
-25.2
-24
-28
-24
-26
-27
April
-17.8
-12
-14
-18
-18
-19
May
-6.7
-2
2
-5
-8
-9
June
4.1
2
7
5
3
3
July
8.9
2
10
10
10
12
August
7.8
3
10
9
8
10
September
3.2
7
5
5
2
October
-5.4
-1
-4
-1
-6
November
-20.0
-16
-20
-16
-22
December
-27.9
-20
-28
-28
-27
Average
-12.6
-11.0
-9.6
-11.5
-11.7
-12.7
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
2020
January
0.0
0
0
0
0
0
February
0.0
0
0
0
0
0
March
0.0
0
0
0
0
0
April
0.0
0
0
0
0
0
May
0.0
0
0
0
0
0
June
0.0
0
0
0
0
0
July
0.0
0
0
0
0
0
August
0.0
0
0
0
0
0
September
0.0
0
0
0
0
October
0.0
0
0
0
0
November
0.0
0
0
0
0
December
0.0
0
0
0
0
Average
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
2022
2021
2020
January
11.2
14
10
16
6
8
February
12.8
13
11
14
13
13
March
14.0
18
10
14
14
14
April
12.9
13
10
11
16
14
May
12.7
13
13
12
14
13
June
12.4
13
13
13
13
11
July
11.7
11
11
11
14
15
August
13.1
13
11
12
14
13
September
14.3
14
14
14
16
October
14.4
14
17
12
11
November
12.0
14
10
10
11
December
8.7
12
11
8
8
Average
12.7
13.2
11.8
12.8
13.0
12.5
Average wind speed
Excluding wind gusts. Only observations between sunrise and sunset are taken into account.
Prevailing wind direction
Month
2024
2023
2022
2021
2020
January
329°
307°
314°
269°
294°
February
309°
301°
304°
318°
315°
March
360°
003°
329°
191°
311°
April
056°
136°
080°
333°
055°
May
098°
206°
073°
019°
016°
June
032°
151°
013°
067°
128°
July
269°
013°
007°
328°
123°
August
289°
306°
334°
311°
163°
September
226°
299°
088°
017°
October
256°
303°
246°
342°
November
306°
013°
323°
261°
December
274°
267°
347°
298°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.