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
May
0.0
0
0
0
0
June
0.0
0
0
0
0
July
0.0
0
0
0
0
August
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
5.2
5
5
4
7
7
February
8.0
9
7
9
9
10
March
12.5
12
7
16
14
13
April
17.5
16
16
20
18
May
22.6
23
20
22
24
June
28.3
25
28
33
28
July
35.0
36
36
37
34
August
34.0
32
36
33
35
September
28.0
26
31
29
31
October
19.2
19
22
19
23
November
10.6
11
6
14
10
December
4.0
4
1
6
6
Average
17.6
8.4
17.5
19.4
20.2
19.8
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
-5.6
-4
-5
-5
-4
-2
February
-5.8
-2
-6
-7
-3
-5
March
-2.7
-1
-4
0
-3
-1
April
1.2
0
0
0
0
May
5.5
7
4
5
6
June
9.8
9
9
13
10
July
13.4
13
15
17
13
August
13.2
14
15
12
13
September
7.7
7
9
7
8
October
1.3
2
2
5
2
November
-4.6
-3
-6
-1
-4
December
-6.8
-2
-8
-4
-7
Average
2.2
-3.6
2.7
2.7
3.6
2.7
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
May
0.0
0
0
0
0
June
0.0
0
0
0
0
July
0.0
0
0
0
0
August
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
6.9
7
7
6
7
9
February
8.6
8
8
6
11
7
March
8.5
10
9
8
8
8
April
8.2
8
9
8
7
May
7.1
7
9
7
8
June
6.5
6
7
7
7
July
5.6
6
6
5
6
August
5.5
5
5
5
6
September
5.8
5
6
6
5
October
5.9
4
5
8
6
November
6.0
5
7
6
7
December
5.8
5
6
9
6
Average
6.9
8.2
6.2
6.6
7.1
6.7
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
230°
217°
191°
196°
224°
February
219°
256°
274°
257°
274°
March
244°
227°
270°
257°
238°
April
258°
260°
290°
301°
May
194°
266°
334°
250°
June
321°
257°
305°
261°
July
253°
258°
280°
270°
August
247°
256°
280°
289°
September
249°
262°
258°
262°
October
238°
305°
223°
269°
November
267°
233°
258°
231°
December
212°
201°
207°
202°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.