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
January
100.0
100
100
100
February
97.8
89
100
100
March
100.0
100
100
100
April
98.2
100
75
100
May
86.2
86
87
June
87.0
69
91
July
90.3
71
94
August
86.5
81
97
September
82.6
96
71
October
61.2
61
62
November
96.1
92
100
December
100.0
100
100
Average
91.6
98.0
83.6
93.1
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
January
15.8
18
10
18
February
19.1
18
21
19
March
20.9
20
16
23
April
22.9
26
22
21
May
23.6
25
23
June
22.7
25
22
July
22.4
22
23
August
22.1
23
21
September
20.8
22
20
October
20.5
21
20
November
18.6
22
17
December
17.1
19
15
Average
20.8
21.2
20.6
20.6
Average highest temperature per day
The maximum temperature is typically observed some hours after noon.
Minimum temperatures (°C)
Month
Average
2024
2023
2022
January
14.1
17
10
15
February
15.8
15
20
14
March
16.6
20
15
17
April
19.8
23
22
17
May
20.9
24
19
June
20.1
24
19
July
18.6
21
18
August
19.0
20
18
September
20.0
22
19
October
19.3
20
19
November
17.1
20
16
December
16.3
18
13
Average
18.6
19.3
19.4
17.2
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
January
0.0
0
0
0
February
2.1
11
0
0
March
0.0
0
0
0
April
0.0
0
0
0
May
0.0
0
0
June
6.4
15
5
July
6.7
6
7
August
6.7
7
6
September
8.6
5
13
October
9.6
17
0
November
0.0
0
0
December
5.0
7
0
Average
3.8
1.9
6.2
3.2
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
January
4.3
4
0
5
February
4.8
3
5
6
March
5.7
2
5
6
April
3.6
3
5
4
May
4.2
5
4
June
3.9
5
4
July
4.1
6
4
August
4.0
4
5
September
4.7
5
4
October
4.9
5
5
November
2.4
3
2
December
3.0
3
4
Average
3.9
3.1
4.2
4.5
Average wind speed
Excluding wind gusts. Only observations between sunrise and sunset are taken into account.
Prevailing wind direction
Month
2024
2023
2022
January
155°
360°
185°
February
155°
177°
192°
March
176°
188°
174°
April
184°
135°
152°
May
215°
185°
June
192°
180°
July
203°
188°
August
193°
167°
September
181°
138°
October
203°
151°
November
176°
244°
December
204°
171°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.