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
92.0
91
95
88
91
93
February
91.6
94
92
89
91
96
March
94.0
91
94
92
93
96
April
96.1
99
98
93
96
94
May
95.6
97
93
98
96
June
96.5
96
96
98
97
July
98.3
100
99
98
99
August
97.7
99
100
97
99
September
95.6
95
92
94
96
October
96.8
96
98
98
95
November
91.1
89
84
93
95
December
90.8
92
89
88
97
Average
94.8
93.6
95.3
93.0
94.7
96.2
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
21.7
22
24
21
21
23
February
25.3
23
27
25
25
25
March
26.3
27
28
27
26
29
April
28.4
28
30
28
28
29
May
30.7
31
31
31
30
June
31.6
32
32
32
32
July
32.2
33
33
32
32
August
32.2
34
33
32
32
September
31.4
32
31
31
31
October
29.4
29
28
30
30
November
25.4
25
26
23
27
December
23.3
22
24
26
22
Average
27.8
24.7
28.8
28.4
28.0
28.4
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
10.9
9
12
10
11
13
February
14.0
11
14
13
15
14
March
14.8
16
15
15
16
16
April
16.0
16
17
8
17
19
May
17.0
19
0
20
19
June
22.2
23
18
23
23
July
23.6
24
23
24
24
August
23.8
25
23
24
24
September
22.8
22
22
23
23
October
20.5
19
18
21
22
November
16.2
16
18
14
19
December
13.3
13
14
15
11
Average
17.4
13.0
18.1
15.1
18.4
18.8
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
2020
January
2.8
4
1
5
1
1
February
2.1
4
1
2
4
2
March
1.2
1
1
3
0
0
April
2.1
1
3
1
3
5
May
2.2
2
1
0
3
June
4.9
2
3
6
9
July
4.8
4
3
4
7
August
4.6
4
1
5
7
September
3.0
0
6
6
5
October
1.8
1
0
1
2
November
4.5
7
6
6
7
December
3.1
6
0
2
2
Average
3.1
2.4
2.6
2.6
3.1
4.1
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
7.2
8
7
7
7
7
February
7.3
7
7
7
8
9
March
7.3
7
8
9
8
6
April
7.5
7
8
8
7
8
May
6.8
6
6
8
8
June
5.4
7
6
7
5
July
4.8
4
5
6
6
August
5.1
6
5
6
5
September
5.5
5
5
5
6
October
6.9
8
5
6
7
November
6.8
6
7
7
9
December
6.5
8
6
5
6
Average
6.5
7.3
6.5
6.2
6.5
6.7
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
050°
246°
338°
255°
056°
February
231°
203°
088°
242°
183°
March
130°
253°
175°
110°
138°
April
096°
084°
089°
171°
243°
May
044°
102°
086°
063°
June
275°
079°
167°
103°
July
276°
156°
189°
168°
August
110°
142°
139°
136°
September
048°
046°
062°
091°
October
043°
044°
081°
072°
November
046°
044°
033°
065°
December
038°
050°
048°
051°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.