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
72.8
95
99
0
100
97
February
74.0
96
94
0
100
94
March
81.5
98
97
0
98
99
April
67.1
97
0
98
97
May
26.0
0
96
98
June
6.7
0
July
15.1
2
100
August
1.0
0
5
September
99.6
99
100
October
99.1
98
100
November
79.1
86
56
100
December
22.9
95
0
0
100
Average
76.8
96.5
96.8
6.0
73.3
90.3
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
22.7
24
25
18
18
26
February
25.4
24
27
26
27
22
March
27.9
27
29
28
27
29
April
29.4
23
29
30
31
May
30.6
31
33
29
June
30.5
30
July
32.6
33
29
August
26.3
21
33
September
29.4
28
31
October
30.0
29
32
November
25.8
28
21
29
December
19.9
21
26
14
22
Average
27.2
25.0
25.8
27.0
24.7
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
11.1
15
14
0
12
15
February
11.7
13
16
1
22
12
March
12.4
18
11
0
16
17
April
11.6
4
0
16
20
May
7.8
0
20
18
June
4.8
0
July
16.6
14
29
August
18.7
14
25
September
20.5
16
25
October
11.6
0
23
November
13.5
20
0
22
December
11.2
15
17
0
17
Average
14.7
15.6
13.4
6.1
9.1
19.7
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
2020
January
2.0
7
0
1
0
1
February
2.4
4
0
2
0
6
March
1.8
5
0
1
2
1
April
0.7
0
0
1
2
May
1.6
2
0
2
June
3.8
4
July
1.5
1
0
August
0.2
0
1
September
2.2
0
3
October
4.5
2
7
November
2.5
0
4
4
December
2.7
11
0
2
3
Average
2.6
4.8
0.7
1.3
1.8
2.5
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
5.3
8
0
7
6
8
February
6.5
7
4
8
7
7
March
7.9
7
8
9
8
8
April
8.5
8
9
8
8
May
7.5
8
7
8
June
5.9
6
July
6.6
7
6
August
4.4
4
5
September
7.0
6
7
October
7.4
7
8
November
6.0
0
7
12
December
4.2
7
0
5
8
Average
6.4
7.4
4.5
6.2
7.2
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
082°
360°
359°
252°
077°
February
015°
187°
083°
147°
014°
March
113°
108°
112°
107°
110°
April
052°
093°
098°
144°
May
106°
157°
058°
June
119°
July
124°
111°
August
127°
114°
September
055°
081°
October
074°
091°
November
360°
028°
075°
December
011°
360°
098°
006°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.