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
6.7
7
0
7
9
8
February
6.1
9
0
8
6
8
March
8.8
10
7
9
9
8
April
11.1
10
10
12
12
May
13.7
15
11
12
15
June
15.7
15
16
19
15
July
16.4
17
17
15
17
August
18.1
19
19
18
17
September
16.6
17
18
16
17
October
13.1
14
15
12
13
November
8.7
10
1
10
10
December
7.2
10
0
6
9
Average
11.4
8.6
11.1
11.1
11.9
12.4
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
4.0
4
0
4
6
4
February
3.4
6
0
5
4
5
March
5.2
6
4
6
5
5
April
6.9
6
6
7
7
May
9.2
10
8
8
10
June
10.6
10
11
11
10
July
11.3
11
12
11
11
August
12.1
13
12
12
12
September
11.4
11
12
11
12
October
9.0
9
10
9
9
November
5.6
7
-2
7
6
December
4.6
7
0
2
6
Average
7.5
5.2
7.3
7.2
7.8
8.1
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
13.7
16
13
11
13
17
February
14.8
13
15
13
19
13
March
11.9
10
14
11
11
12
April
12.2
13
13
11
11
May
13.6
16
14
13
14
June
14.9
17
13
14
14
July
16.6
18
15
21
15
August
14.0
14
13
16
13
September
10.0
11
12
11
10
October
10.9
11
10
12
13
November
12.3
13
10
14
12
December
12.9
13
13
17
13
Average
13.2
12.6
14.1
12.4
14.2
12.9
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
015°
043°
024°
026°
307°
February
029°
337°
348°
310°
282°
March
001°
029°
321°
274°
301°
April
283°
281°
257°
277°
May
268°
281°
266°
285°
June
265°
271°
264°
273°
July
267°
266°
268°
268°
August
262°
259°
267°
263°
September
265°
245°
276°
240°
October
048°
248°
013°
278°
November
006°
036°
331°
327°
December
358°
027°
345°
020°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.