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
5.5
5
7
5
7
4
February
5.5
7
6
7
5
6
March
6.7
8
6
8
6
6
April
9.3
9
9
10
8
May
12.1
13
12
11
13
June
14.3
15
15
15
14
July
16.4
17
16
17
17
August
16.8
18
18
17
16
September
15.3
15
16
15
15
October
11.5
12
13
10
11
November
7.9
9
6
8
8
December
5.8
8
3
2
8
Average
10.3
6.6
11.1
10.8
10.2
10.5
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
2.5
3
4
2
3
0
February
1.7
3
2
4
1
2
March
2.2
3
2
3
2
3
April
4.2
3
3
4
5
May
7.4
8
6
7
8
June
9.7
9
10
10
10
July
11.6
11
12
11
12
August
12.3
13
13
12
12
September
10.9
11
12
10
11
October
7.3
8
9
6
7
November
4.2
6
2
4
3
December
2.4
4
-1
-1
5
Average
6.1
2.4
6.6
6.4
5.7
6.5
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
16.7
17
17
16
19
16
February
15.3
13
18
15
17
15
March
13.5
12
16
14
14
14
April
14.4
16
15
12
15
May
12.6
12
12
13
13
June
12.5
11
12
12
14
July
10.5
10
11
11
11
August
11.8
10
11
11
12
September
12.5
15
13
16
11
October
13.9
15
14
15
12
November
16.3
15
17
18
17
December
16.3
19
13
15
21
Average
13.5
13.6
14.2
13.3
13.9
13.8
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
105°
139°
148°
149°
126°
February
031°
172°
163°
158°
199°
March
124°
106°
151°
196°
210°
April
152°
116°
214°
169°
May
264°
177°
183°
141°
June
246°
203°
179°
177°
July
252°
227°
260°
183°
August
215°
220°
248°
166°
September
151°
192°
157°
169°
October
131°
184°
150°
166°
November
153°
112°
161°
168°
December
149°
065°
089°
147°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.