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
86.4
75
83
91
92
81
February
83.3
93
87
88
80
85
March
88.8
87
88
94
94
81
April
90.4
88
90
95
86
87
May
93.6
93
97
88
97
June
97.0
100
100
94
96
July
97.0
100
99
90
99
August
97.6
100
97
96
100
September
95.4
98
98
97
95
October
92.3
91
98
95
93
November
88.4
84
83
90
91
December
87.4
92
81
88
92
Average
91.1
85.6
92.3
94.1
91.0
91.6
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
17.8
15
19
17
18
20
February
19.2
21
20
17
15
19
March
24.1
24
24
24
25
25
April
26.5
27
25
28
25
27
May
30.5
29
33
27
31
June
34.2
35
36
32
33
July
36.1
37
38
32
36
August
36.5
40
36
33
38
September
33.3
37
34
33
30
October
28.1
29
29
29
29
November
21.8
21
19
22
26
December
19.6
20
19
24
20
Average
26.7
21.5
28.0
27.8
26.4
27.7
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
4.8
3
6
3
6
7
February
7.0
9
7
2
3
6
March
11.8
13
13
7
11
15
April
14.2
16
13
16
13
14
May
19.3
19
21
18
19
June
22.6
23
23
22
22
July
23.5
24
24
22
24
August
23.5
25
23
23
23
September
21.0
23
19
19
21
October
15.0
16
14
16
14
November
9.5
10
10
9
11
December
6.7
6
11
12
5
Average
14.3
10.1
15.4
14.4
14.4
15.0
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
10
7
6
7
8
February
8.2
4
4
7
12
9
March
5.6
7
6
3
2
12
April
5.1
5
8
3
8
8
May
3.7
6
2
7
3
June
2.3
2
0
2
3
July
1.3
1
0
5
2
August
2.0
0
3
2
0
September
3.5
1
0
1
8
October
4.0
6
1
3
1
November
7.5
8
14
5
6
December
8.3
5
8
6
8
Average
4.9
6.5
4.3
3.5
4.7
5.3
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
8.3
8
8
8
8
8
February
9.7
10
10
10
10
10
March
9.5
9
10
10
10
8
April
9.7
10
10
11
9
9
May
9.0
6
11
9
9
June
8.2
8
8
7
8
July
7.6
8
8
7
8
August
7.6
8
8
7
7
September
6.9
7
5
6
9
October
8.0
9
7
7
7
November
7.9
8
8
8
7
December
7.8
7
8
9
7
Average
8.5
9.1
8.2
8.5
8.1
8.1
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
360°
322°
352°
332°
154°
February
225°
247°
001°
014°
346°
March
150°
146°
193°
123°
134°
April
157°
089°
151°
107°
090°
May
137°
168°
115°
142°
June
173°
162°
151°
153°
July
176°
176°
157°
163°
August
164°
149°
164°
164°
September
150°
101°
082°
018°
October
081°
145°
169°
042°
November
020°
050°
127°
102°
December
354°
163°
187°
249°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.