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
6.4
0
8
7
8
5
February
5.2
0
6
7
6
7
March
6.0
0
6
8
7
6
April
8.3
7
8
8
8
May
10.3
11
9
9
13
June
12.3
12
12
13
12
July
12.8
4
14
14
14
August
13.1
0
16
16
15
September
13.0
0
15
14
16
October
10.5
0
14
11
12
November
7.9
0
8
9
9
December
6.2
0
4
5
9
Average
8.4
4.4
10.2
9.9
10.5
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
3.8
0
6
4
5
2
February
2.6
0
3
5
3
4
March
3.0
0
3
5
4
3
April
5.1
4
4
5
5
May
7.5
8
6
7
9
June
9.7
9
10
10
10
July
10.5
3
12
11
12
August
10.9
0
13
13
13
September
10.5
0
13
12
13
October
7.9
0
10
8
9
November
5.3
0
4
6
6
December
3.6
0
1
1
6
Average
6.0
2.9
7.4
7.0
7.6
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
14.3
14
14
16
17
13
February
13.8
8
16
15
16
17
March
10.9
1
13
12
15
13
April
12.5
13
11
12
13
May
11.1
12
10
12
11
June
11.3
11
10
11
13
July
9.4
10
10
9
9
August
10.7
10
9
10
12
September
11.2
13
13
13
11
October
12.7
12
15
14
11
November
14.2
14
14
17
18
December
14.3
19
10
12
17
Average
11.5
7.1
12.6
11.7
13.0
12.8
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
126°
164°
152°
163°
158°
February
313°
162°
178°
235°
211°
March
159°
136°
137°
244°
282°
April
151°
189°
229°
167°
May
229°
235°
216°
155°
June
235°
295°
201°
197°
July
295°
189°
294°
185°
August
214°
278°
292°
189°
September
156°
190°
172°
167°
October
130°
223°
173°
178°
November
151°
154°
184°
186°
December
145°
028°
293°
154°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.