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
84.4
79
84
98
83
71
February
79.2
92
86
82
76
76
March
89.8
86
93
94
91
78
April
91.1
88
90
91
92
89
May
93.3
94
94
90
93
June
94.5
94
98
88
96
July
94.3
76
98
95
94
August
93.9
99
87
94
98
September
93.8
96
99
85
October
89.4
94
94
0
82
November
88.3
90
90
91
December
83.3
92
80
83
Average
89.6
86.3
91.7
93.0
88.6
87.0
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
14.7
11
18
16
13
15
February
17.2
19
19
17
12
16
March
22.1
21
23
22
23
23
April
24.6
25
24
26
24
24
May
29.0
29
31
27
28
June
32.3
33
34
31
32
July
33.9
33
36
33
33
August
33.7
37
33
33
33
September
31.5
33
31
29
October
25.4
26
26
17
24
November
19.3
18
19
22
December
15.8
16
17
16
Average
24.2
18.8
24.9
26.1
23.5
24.5
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
3.5
-2
6
2
4
6
February
6.2
7
7
3
2
6
March
10.3
10
11
8
10
13
April
12.7
14
12
13
11
13
May
17.8
17
19
17
17
June
21.6
20
22
21
22
July
22.7
8
25
23
24
August
22.9
23
23
23
22
September
20.1
20
18
20
October
13.5
13
12
17
13
November
7.8
7
7
10
December
5.3
4
10
4
Average
12.9
7.4
12.3
13.7
12.9
14.1
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
2020
January
6.8
13
7
2
6
12
February
10.4
7
10
13
9
12
March
5.3
7
4
5
7
10
April
3.7
2
8
4
3
4
May
2.9
1
2
5
4
June
2.6
1
1
5
5
July
2.4
3
3
3
4
August
3.1
0
8
3
2
September
3.8
3
2
7
October
4.9
4
1
0
7
November
3.4
5
2
2
December
7.9
3
11
10
Average
4.8
6.7
3.7
4.0
5.0
6.3
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
5.1
5
6
5
5
5
February
5.2
6
5
5
4
5
March
5.4
4
5
6
6
5
April
5.2
5
5
6
5
5
May
4.6
3
5
5
5
June
3.9
3
4
4
5
July
3.5
4
4
3
3
August
3.4
4
3
3
4
September
3.2
3
2
4
October
3.6
5
4
0
4
November
3.7
3
3
4
December
4.3
4
5
4
Average
4.4
5.1
4.1
4.3
4.4
4.3
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
294°
222°
302°
283°
161°
February
209°
211°
268°
084°
250°
March
155°
140°
221°
158°
160°
April
185°
101°
166°
150°
111°
May
087°
178°
133°
138°
June
202°
123°
183°
164°
July
237°
195°
207°
182°
August
354°
141°
177°
338°
September
078°
012°
021°
October
238°
179°
360°
082°
November
233°
052°
088°
December
232°
189°
219°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.