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
90.3
82
88
99
83
92
February
90.3
97
94
95
75
87
March
93.3
94
95
98
97
81
April
95.5
96
97
100
90
92
May
97.8
99
100
94
100
June
97.9
95
98
98
99
July
99.2
99
100
97
100
August
98.7
100
97
98
100
September
95.2
98
100
99
96
October
94.6
93
96
99
95
November
91.0
92
95
93
95
December
91.8
93
83
99
94
Average
94.6
92.2
95.5
97.3
93.7
94.3
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
13.6
11
15
15
11
15
February
16.3
19
17
14
11
15
March
21.6
22
21
22
22
21
April
25.0
27
25
30
23
25
May
28.0
29
34
27
32
June
34.2
35
35
34
34
July
35.7
37
38
34
37
August
35.1
38
34
35
36
September
30.9
34
32
33
28
October
24.8
25
24
28
25
November
18.8
18
16
21
22
December
15.8
16
16
22
15
Average
24.4
19.6
25.8
26.1
25.0
25.4
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
0.3
-1
2
-1
1
2
February
1.6
5
2
-2
-2
1
March
7.1
8
7
5
6
10
April
10.4
13
9
13
10
10
May
14.9
17
18
14
16
June
20.4
20
22
20
19
July
22.0
22
25
20
23
August
21.7
23
22
20
22
September
18.2
20
18
17
16
October
11.4
12
12
13
10
November
5.5
7
5
6
8
December
2.5
3
5
5
1
Average
10.7
6.0
12.1
12.0
10.9
11.5
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
2020
January
2.3
3
2
0
5
1
February
3.5
3
5
4
7
6
March
1.6
3
0
1
1
7
April
1.5
2
0
0
2
1
May
0.7
2
1
2
0
June
0.7
1
1
2
0
July
0.6
0
0
2
1
August
1.2
0
3
2
0
September
2.7
2
0
0
3
October
3.4
4
5
0
0
November
1.9
2
4
1
1
December
3.6
5
2
1
4
Average
2.0
2.5
1.7
1.6
1.9
1.8
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
9.5
9
10
9
10
9
February
9.8
11
11
9
7
10
March
10.8
10
11
11
13
10
April
11.2
11
11
12
11
10
May
9.9
8
10
11
10
June
9.1
8
10
8
10
July
7.7
8
8
7
8
August
8.0
8
7
8
8
September
7.6
7
7
7
7
October
8.9
9
8
9
9
November
9.3
9
10
9
10
December
8.9
9
9
10
10
Average
9.3
10.1
9.0
9.1
8.9
9.1
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
252°
251°
264°
312°
233°
February
257°
241°
306°
238°
250°
March
226°
213°
244°
190°
220°
April
234°
178°
190°
120°
210°
May
155°
192°
122°
157°
June
147°
154°
156°
165°
July
168°
161°
154°
161°
August
152°
128°
169°
158°
September
176°
172°
161°
082°
October
155°
183°
199°
146°
November
223°
218°
195°
192°
December
232°
211°
228°
285°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.