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
94.6
92
90
98
99
83
February
93.9
91
96
97
98
88
March
94.6
93
88
96
98
89
April
95.4
88
100
96
82
May
93.9
87
98
96
89
June
94.8
96
97
95
84
July
95.5
93
96
97
78
August
95.6
93
99
95
100
September
97.1
97
99
97
100
October
97.5
99
95
97
100
November
96.7
99
98
93
100
December
95.0
98
96
90
100
Average
94.1
92.0
93.5
97.2
95.9
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
18.3
19
17
21
21
12
February
18.7
18
18
22
21
14
March
19.7
19
18
23
20
15
April
22.6
22
24
23
17
May
22.4
21
24
24
22
June
26.4
24
29
27
24
July
29.8
31
29
30
27
August
30.4
31
32
31
27
September
28.9
27
32
30
27
October
26.7
28
26
25
24
November
23.0
25
21
26
16
December
19.0
22
17
18
14
Average
23.2
18.7
23.6
25.1
24.5
19.7
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
6.2
7
7
6
5
6
February
6.5
9
4
5
7
7
March
8.6
9
8
8
7
10
April
11.2
10
11
11
12
May
13.5
13
13
14
15
June
15.6
15
16
16
16
July
18.0
18
18
19
17
August
19.1
19
20
19
20
September
17.8
18
20
18
17
October
13.3
13
16
12
15
November
8.8
8
7
10
8
December
6.3
7
6
8
5
Average
11.6
8.1
11.6
12.3
11.9
12.2
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
2020
January
4.0
5
8
1
4
0
February
4.3
7
4
1
0
0
March
2.7
5
7
1
3
7
April
0.6
0
0
1
18
May
1.5
0
0
0
0
June
0.0
0
0
0
0
July
0.0
0
0
0
0
August
0.2
1
0
0
0
September
0.4
0
2
0
0
October
0.1
0
0
0
0
November
1.5
0
2
0
0
December
3.2
1
5
4
0
Average
1.9
5.6
1.6
0.7
1.0
1.4
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
3.4
3
5
2
4
1
February
4.2
4
5
5
3
2
March
4.7
5
5
5
5
4
April
5.0
5
5
5
4
May
5.0
5
5
5
5
June
4.6
5
5
4
4
July
4.4
4
4
4
3
August
4.6
5
5
5
3
September
4.7
5
5
4
7
October
4.3
4
4
4
5
November
3.7
3
5
3
3
December
2.7
2
3
3
4
Average
4.2
4.0
4.4
4.6
4.2
3.4
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
260°
242°
252°
251°
226°
February
253°
247°
255°
262°
237°
March
246°
246°
252°
252°
239°
April
260°
259°
255°
186°
May
249°
245°
238°
270°
June
261°
241°
247°
242°
July
252°
244°
251°
265°
August
262°
253°
255°
225°
September
261°
256°
260°
255°
October
260°
259°
257°
291°
November
258°
253°
270°
271°
December
254°
262°
249°
272°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.