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
91.7
94
91
92
86
91
February
86.3
93
91
90
73
88
March
91.8
86
93
88
93
89
April
95.3
89
97
95
97
May
96.1
93
97
97
97
June
92.5
91
94
94
93
July
93.1
92
94
91
93
August
93.1
97
92
93
84
September
89.9
95
95
91
62
October
93.7
96
92
93
90
November
90.1
88
91
98
88
December
85.4
90
86
92
88
Average
91.8
90.6
92.2
92.5
91.6
88.5
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
17.7
18
20
15
16
19
February
19.3
21
7
20
19
19
March
22.9
23
17
24
24
26
April
25.9
25
26
24
26
May
29.6
28
30
29
29
June
31.7
31
34
31
31
July
31.9
34
33
32
34
August
30.6
36
32
32
33
September
31.2
31
30
30
29
October
27.4
27
27
27
28
November
22.0
22
22
21
24
December
18.1
19
21
17
17
Average
25.2
20.5
24.9
26.5
25.8
26.2
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
6.3
5
8
4
7
8
February
8.6
7
4
7
8
8
March
9.6
12
-3
11
12
15
April
12.5
8
13
13
14
May
17.8
17
18
17
17
June
21.5
21
22
22
20
July
22.2
24
22
23
23
August
20.7
24
22
23
23
September
20.5
20
19
20
21
October
15.2
13
11
16
17
November
9.4
9
11
6
13
December
7.8
7
10
3
4
Average
13.7
8.2
12.6
14.4
14.9
15.3
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
2020
January
0.0
0
0
0
0
0
February
0.0
0
0
0
0
0
March
0.0
0
0
0
0
0
April
0.0
0
0
0
0
May
0.0
0
0
0
0
June
0.0
0
0
0
0
July
0.0
0
0
0
0
August
0.0
0
0
0
0
September
0.0
0
0
0
0
October
0.0
0
0
0
0
November
0.0
0
0
0
0
December
0.0
0
0
0
0
Average
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
3.6
5
4
4
4
4
February
3.5
5
6
2
3
5
March
4.0
4
5
4
5
5
April
3.6
4
5
3
1
May
2.9
4
4
5
0
June
2.4
4
3
3
0
July
1.6
3
3
0
0
August
2.5
3
3
3
2
September
2.7
3
3
2
4
October
3.2
3
3
3
3
November
3.0
3
5
2
3
December
3.2
4
3
1
4
Average
3.1
4.5
3.8
3.3
2.9
2.4
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
241°
235°
303°
236°
190°
February
219°
240°
116°
183°
248°
March
127°
225°
210°
182°
241°
April
174°
192°
218°
256°
May
056°
243°
156°
360°
June
238°
342°
212°
060°
July
252°
234°
209°
360°
August
294°
216°
166°
031°
September
073°
067°
140°
263°
October
043°
047°
195°
316°
November
030°
051°
024°
077°
December
098°
119°
239°
243°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.