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
January
99.0
99
February
76.5
77
March
99.4
99
April
100.0
100
May
June
100.0
100
July
100.0
100
August
100.0
100
September
99.7
100
October
100.0
100
November
99.7
100
December
98.7
99
Average
97.0
94.2
99.7
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
January
16.0
16
February
14.7
15
March
20.2
20
April
26.3
26
May
June
36.0
36
July
40.4
41
August
37.3
37
September
35.7
36
October
29.8
30
November
23.0
23
December
18.0
18
Average
25.4
19.3
31.5
Average highest temperature per day
The maximum temperature is typically observed some hours after noon.
Minimum temperatures (°C)
Month
Average
2024
2023
January
3.0
3
February
4.0
4
March
6.2
6
April
9.1
9
May
June
18.7
19
July
25.4
25
August
23.9
24
September
19.8
20
October
15.2
15
November
8.8
9
December
4.3
4
Average
11.1
5.6
16.6
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
January
3.0
3
February
3.3
3
March
2.6
3
April
0.2
0
May
June
0.0
0
July
0.0
0
August
0.0
0
September
0.5
1
October
0.0
0
November
0.0
0
December
3.3
3
Average
1.4
2.2
0.5
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
January
4.7
5
February
5.0
5
March
6.3
6
April
6.5
7
May
June
6.7
7
July
5.7
6
August
6.1
6
September
6.0
6
October
5.7
6
November
5.2
5
December
3.9
4
Average
5.6
5.6
5.6
Average wind speed
Excluding wind gusts. Only observations between sunrise and sunset are taken into account.
Prevailing wind direction
Month
2024
2023
January
275°
February
241°
March
234°
April
233°
May
June
229°
July
297°
August
195°
September
212°
October
174°
November
182°
December
347°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.