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
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
8
8
7
8
8
February
7.0
9
7
8
7
8
March
9.6
10
10
10
10
9
April
12.3
11
11
13
13
May
16.9
18
14
16
17
June
19.3
19
18
21
18
July
22.0
23
22
23
18
August
22.1
22
24
22
September
17.6
18
20
18
10
October
11.9
13
16
13
4
November
9.6
10
8
11
10
December
7.0
10
4
5
9
Average
12.9
9.2
14.1
13.8
13.9
10.9
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
7
5
4
5
4
February
3.4
6
4
4
3
5
March
5.2
6
5
6
5
5
April
7.1
7
6
8
7
May
9.9
11
8
9
10
June
11.8
12
12
13
11
July
13.3
13
14
13
12
August
14.2
15
15
14
September
11.8
12
13
12
6
October
8.3
10
11
9
2
November
6.4
7
4
7
6
December
4.1
7
2
2
6
Average
7.9
5.8
8.9
8.4
8.4
6.4
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
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
10.6
6
9
9
9
14
February
9.9
7
10
8
11
8
March
8.1
9
9
7
9
8
April
7.0
10
8
6
6
May
5.0
6
7
5
6
June
5.4
7
5
6
6
July
5.1
7
5
7
7
August
3.8
5
6
6
September
4.5
6
5
6
3
October
6.7
6
7
10
4
November
9.4
7
8
11
11
December
9.4
8
10
12
7
Average
7.0
8.0
7.4
6.8
7.7
7.2
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
053°
135°
184°
128°
152°
February
151°
139°
147°
099°
198°
March
140°
155°
178°
176°
191°
April
183°
191°
227°
206°
May
235°
207°
219°
220°
June
238°
230°
219°
206°
July
234°
241°
217°
206°
August
247°
242°
222°
September
227°
251°
193°
234°
October
115°
219°
160°
087°
November
144°
099°
181°
166°
December
139°
095°
116°
159°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.