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
86.5
83
84
94
84
83
February
81.9
95
83
88
81
86
March
89.6
88
92
94
88
87
April
91.8
95
91
93
88
86
May
95.3
95
98
93
95
June
96.5
96
99
97
96
July
96.5
96
97
97
96
August
97.3
98
98
99
99
September
95.9
99
96
93
October
92.5
97
97
94
89
November
89.2
86
89
91
91
December
88.6
91
84
88
88
Average
91.8
90.3
92.6
94.0
91.5
91.0
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
18.4
17
21
18
18
19
February
20.4
22
22
18
17
20
March
24.1
24
25
24
24
25
April
26.3
27
26
29
25
26
May
29.4
30
29
28
29
June
32.6
35
35
33
31
July
33.7
36
36
32
33
August
34.4
39
36
34
34
September
31.7
36
32
30
October
27.4
28
27
29
27
November
22.3
22
21
22
25
December
20.3
20
22
25
20
Average
26.2
22.6
28.2
26.7
26.6
26.6
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
7.7
6
10
6
8
10
February
10.0
11
11
6
7
8
March
13.8
15
15
10
13
17
April
15.5
17
16
17
15
16
May
18.5
21
18
15
19
June
22.4
23
23
23
22
July
23.0
24
24
23
23
August
22.6
24
24
24
23
September
21.7
23
21
22
October
16.6
18
15
18
16
November
11.6
12
12
12
14
December
9.6
10
14
15
8
Average
15.5
12.2
17.2
15.0
16.1
16.3
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
2020
January
5.8
5
5
6
5
10
February
6.3
4
4
5
6
7
March
3.9
3
6
5
5
2
April
3.0
1
4
1
7
4
May
3.7
4
1
10
2
June
3.1
0
1
6
3
July
2.7
1
2
6
3
August
3.1
1
4
2
1
September
6.0
2
5
8
October
3.3
5
3
3
4
November
6.7
10
14
5
5
December
4.9
2
1
1
7
Average
4.2
3.2
3.5
3.7
5.0
4.5
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
6.3
7
7
6
6
6
February
6.4
6
6
6
6
7
March
6.4
5
7
7
7
7
April
6.6
6
6
7
6
6
May
5.6
4
5
6
6
June
4.6
4
4
4
5
July
3.7
4
4
3
4
August
4.0
5
4
3
4
September
4.6
4
4
5
October
5.1
6
6
4
5
November
5.2
5
6
5
5
December
5.5
5
5
5
5
Average
5.4
6.2
5.0
5.5
5.0
5.4
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
360°
335°
350°
344°
068°
February
248°
228°
006°
087°
331°
March
123°
129°
180°
105°
146°
April
153°
098°
138°
108°
095°
May
131°
160°
128°
153°
June
199°
159°
160°
133°
July
200°
180°
167°
165°
August
157°
144°
168°
158°
September
117°
073°
030°
October
076°
140°
031°
044°
November
037°
063°
051°
076°
December
048°
122°
176°
099°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.