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
90.8
83
94
97
84
89
February
91.6
99
94
94
86
95
March
95.0
93
93
99
98
90
April
95.5
98
100
91
95
May
96.3
95
99
88
98
June
97.5
94
100
99
July
98.1
98
95
100
August
97.0
92
96
100
September
95.2
92
97
94
October
93.2
94
96
97
93
November
92.6
94
89
91
97
December
89.7
95
89
77
96
Average
94.1
91.5
94.5
96.4
90.8
95.4
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
15.5
13
18
16
14
17
February
17.2
20
19
15
12
16
March
22.3
22
22
23
22
22
April
25.6
27
29
23
25
May
29.7
30
32
25
31
June
33.9
36
36
33
July
36.4
38
38
37
August
35.9
40
34
37
September
31.8
34
33
29
October
25.9
27
22
28
27
November
19.7
20
16
20
23
December
16.6
18
16
19
17
Average
24.3
18.1
27.3
24.1
22.6
26.0
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
1.0
0
2
-2
2
3
February
3.4
7
3
-2
0
3
March
8.2
9
7
5
7
12
April
11.6
11
14
11
11
May
16.9
17
21
14
16
June
21.1
21
22
20
July
22.7
24
24
23
August
22.5
24
22
22
September
19.0
21
17
17
October
12.1
13
9
13
10
November
5.8
7
5
6
7
December
2.8
3
7
5
0
Average
10.7
5.2
12.7
9.7
8.9
11.9
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
2020
January
0.2
0
0
0
0
0
February
0.8
0
0
0
0
0
March
0.4
0
0
0
0
0
April
0.2
0
0
0
0
May
4.9
0
0
0
0
June
7.3
0
0
0
July
18.0
0
0
0
August
11.4
0
0
0
September
3.7
0
0
0
October
0.2
0
0
0
0
November
0.1
0
0
0
0
December
0.4
0
0
0
0
Average
3.3
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
7.4
8
9
3
8
8
February
8.5
9
10
9
7
9
March
9.4
9
10
11
11
8
April
9.9
9
12
9
9
May
8.6
7
11
8
9
June
7.9
7
8
9
July
7.0
7
7
8
August
7.1
8
7
7
September
6.8
7
6
7
October
7.6
8
7
8
6
November
7.5
6
8
7
8
December
6.5
8
7
1
8
Average
8.0
8.2
7.9
8.5
7.2
8.0
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
291°
256°
316°
307°
222°
February
247°
245°
318°
262°
292°
March
191°
191°
227°
177°
156°
April
120°
173°
122°
189°
May
139°
168°
089°
145°
June
166°
153°
153°
July
172°
158°
157°
August
154°
156°
161°
September
169°
134°
055°
October
127°
348°
194°
151°
November
184°
156°
162°
177°
December
218°
178°
204°
287°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.