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
August
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
7.7
8
8
7
8
7
February
6.5
8
6
7
6
7
March
7.7
9
7
8
7
7
April
9.0
8
8
10
9
May
11.3
13
9
10
13
June
13.1
13
13
15
12
July
15.1
15
16
14
August
15.9
18
16
16
September
15.5
14
16
14
18
October
12.5
13
14
11
13
November
9.4
10
8
9
9
December
7.7
10
6
5
9
Average
10.5
8.2
11.3
10.9
10.5
10.1
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
4.8
5
6
4
5
3
February
3.4
5
3
5
3
4
March
4.2
5
3
5
4
4
April
5.6
5
5
6
6
May
8.2
9
7
7
9
June
9.9
9
10
11
10
July
11.9
12
12
11
August
12.7
14
13
12
September
12.0
10
13
11
14
October
9.4
10
11
8
10
November
6.5
7
4
6
6
December
4.7
7
3
2
6
Average
7.3
5.0
7.9
7.8
7.2
7.0
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
August
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
24.4
26
23
26
24
24
February
18.3
18
26
21
19
17
March
17.6
17
16
22
25
15
April
18.1
21
19
15
16
May
16.5
17
17
19
10
June
15.2
16
14
20
5
July
15.8
13
15
24
August
14.3
15
19
9
September
15.6
16
14
17
16
October
17.4
19
17
16
14
November
20.8
20
17
27
23
December
21.5
25
16
17
28
Average
17.9
20.0
18.3
17.4
18.9
16.2
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
105°
117°
126°
115°
131°
February
076°
110°
089°
015°
107°
March
091°
115°
114°
105°
143°
April
131°
130°
008°
005°
May
344°
127°
356°
119°
June
342°
091°
360°
004°
July
015°
348°
360°
August
349°
013°
359°
September
069°
072°
111°
115°
October
099°
059°
101°
046°
November
116°
105°
127°
114°
December
118°
062°
067°
120°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.