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
6.0
5
7
6
7
4
February
4.9
6
5
6
4
6
March
6.8
8
7
7
6
7
April
8.8
8
8
9
6
May
11.7
13
10
11
13
June
13.6
14
13
15
13
July
15.6
16
16
15
16
August
15.9
17
17
16
15
September
14.5
14
15
13
15
October
11.4
12
13
10
11
November
8.1
9
6
9
8
December
5.7
8
3
2
8
Average
9.6
6.3
10.7
10.2
9.7
10.1
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
3.0
3
4
3
4
1
February
1.7
3
2
4
1
3
March
3.1
4
2
4
3
3
April
4.9
5
4
5
1
May
7.9
8
7
8
9
June
10.2
10
10
11
10
July
12.2
12
12
12
12
August
12.4
13
13
12
12
September
11.1
11
11
11
12
October
7.9
9
9
7
7
November
5.2
6
3
5
4
December
2.9
5
-1
-1
5
Average
6.3
3.0
7.3
6.8
6.4
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
14.4
12
16
15
17
14
February
11.5
10
19
14
0
14
March
10.4
11
12
14
0
14
April
10.3
14
11
0
7
May
9.7
9
10
0
8
June
8.8
8
7
0
9
July
8.7
5
8
0
7
August
9.8
8
8
0
11
September
10.9
11
11
7
9
October
12.4
12
13
14
9
November
14.9
16
13
17
18
December
14.6
20
10
11
19
Average
11.1
10.9
11.3
10.9
4.7
11.5
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
113°
132°
134°
126°
001°
February
033°
127°
138°
360°
148°
March
131°
121°
138°
360°
123°
April
140°
131°
360°
083°
May
253°
149°
360°
157°
June
223°
189°
360°
159°
July
253°
181°
360°
194°
August
194°
196°
360°
148°
September
143°
145°
138°
145°
October
133°
155°
136°
120°
November
131°
119°
142°
131°
December
131°
092°
077°
132°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.