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
3.6
3
8
2
3
6
February
6.3
7
9
7
2
7
March
9.8
12
11
12
12
12
April
16.3
20
16
17
14
May
21.7
23
24
22
21
June
26.3
26
27
28
27
July
29.6
31
31
29
31
August
28.2
27
32
29
28
September
23.9
21
25
25
24
October
18.5
19
18
21
17
November
11.0
11
14
11
15
December
6.0
8
7
9
6
Average
15.7
7.2
17.8
18.2
17.3
17.1
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
-5.7
-3
1
-8
-4
-3
February
-4.3
-3
-2
-5
-7
-2
March
-1.7
2
0
1
0
2
April
5.2
7
6
5
4
May
9.9
8
12
9
9
June
14.7
14
15
16
15
July
18.5
19
19
19
20
August
17.7
18
19
19
18
September
13.3
12
14
15
13
October
8.4
8
7
12
8
November
0.9
0
4
1
2
December
-2.2
1
-1
1
-3
Average
5.7
-2.9
7.1
7.1
7.0
6.8
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
4.2
4
4
5
5
4
February
4.3
4
4
5
4
4
March
4.8
5
5
5
5
5
April
4.7
4
5
4
6
May
3.5
3
3
4
4
June
3.1
3
3
3
3
July
2.8
3
3
3
3
August
2.7
3
3
2
3
September
2.9
3
3
3
3
October
3.4
3
4
3
4
November
4.0
3
5
3
4
December
3.4
2
4
3
5
Average
3.7
4.2
3.3
3.8
3.5
3.8
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
289°
309°
296°
330°
300°
February
305°
277°
252°
331°
251°
March
324°
298°
267°
306°
267°
April
239°
293°
307°
309°
May
271°
341°
302°
275°
June
322°
281°
227°
241°
July
226°
226°
261°
220°
August
274°
232°
240°
230°
September
014°
262°
252°
288°
October
287°
350°
267°
243°
November
296°
255°
275°
261°
December
341°
335°
259°
277°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.