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
5.4
6
9
4
4
7
February
6.3
7
7
6
4
7
March
8.5
11
9
9
9
10
April
12.7
15
13
13
11
May
17.9
19
18
19
17
June
22.9
22
23
24
24
July
26.8
28
28
26
28
August
26.3
25
27
27
27
September
23.0
24
23
24
23
October
18.3
19
18
20
18
November
12.5
12
14
11
15
December
7.9
10
9
9
8
Average
14.8
7.7
16.5
16.2
15.9
16.0
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
-1.6
1
3
-4
0
1
February
0.2
1
0
-2
-1
1
March
2.2
4
3
2
2
4
April
6.4
8
6
7
6
May
10.6
11
11
11
9
June
15.9
16
16
17
17
July
20.2
22
21
19
21
August
20.3
20
21
20
21
September
17.0
18
17
18
17
October
12.1
13
12
13
12
November
5.9
6
8
5
8
December
2.2
5
4
4
2
Average
8.5
2.2
10.3
9.5
9.5
9.7
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
8.3
8
7
9
9
8
February
7.7
7
7
8
8
8
March
8.3
8
8
8
8
8
April
7.5
7
8
8
9
May
6.1
6
6
6
7
June
5.0
5
5
5
4
July
4.6
4
5
5
5
August
4.8
5
5
4
5
September
5.8
6
6
6
5
October
6.6
5
6
7
6
November
7.6
7
7
7
8
December
8.0
7
10
7
8
Average
6.7
7.7
6.0
6.5
6.4
6.5
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
309°
302°
310°
315°
292°
February
304°
300°
281°
335°
277°
March
300°
305°
275°
285°
320°
April
237°
282°
286°
302°
May
264°
045°
279°
278°
June
316°
264°
234°
247°
July
245°
239°
269°
235°
August
296°
259°
273°
250°
September
019°
310°
306°
353°
October
301°
007°
342°
345°
November
295°
274°
298°
270°
December
304°
330°
288°
296°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.