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
96.6
96
99
94
99
96
February
91.6
97
97
86
89
89
March
92.4
94
97
89
87
96
April
91.2
97
91
86
92
May
95.0
96
98
89
98
June
98.1
98
100
100
95
July
98.2
99
99
100
96
August
99.6
99
100
100
100
September
98.8
99
100
98
100
October
98.3
98
99
99
97
November
97.2
99
92
100
99
December
95.8
99
98
89
98
Average
96.0
95.8
97.8
94.5
94.5
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
22.4
23
25
20
21
23
February
22.2
23
23
22
21
22
March
23.8
25
24
24
22
24
April
24.8
25
25
23
26
May
22.1
8
28
26
27
June
29.6
31
30
29
28
July
31.4
32
32
32
30
August
31.7
32
33
32
31
September
30.3
32
25
30
29
October
20.2
28
26
0
27
November
18.7
24
25
0
25
December
17.3
24
26
0
22
Average
24.0
23.5
25.7
25.8
19.7
26.1
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
16.9
18
17
16
14
19
February
17.8
19
16
18
18
18
March
20.4
22
19
20
19
22
April
17.2
1
23
22
24
May
19.8
5
25
25
25
June
26.6
27
26
27
26
July
28.0
29
28
28
28
August
28.8
29
29
29
29
September
24.3
28
25
18
27
October
18.3
24
24
0
25
November
16.8
22
22
0
24
December
10.6
20
23
0
2
Average
20.2
19.4
19.9
22.6
16.5
22.3
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
2020
January
7.9
1
0
12
8
20
February
8.9
4
2
8
14
19
March
2.9
0
1
2
5
7
April
0.2
1
0
0
0
May
1.9
0
1
4
3
June
2.9
0
0
4
8
July
3.5
1
1
2
10
August
1.0
0
13
2
1
September
3.3
1
0
5
4
October
2.7
2
2
5
2
November
2.8
5
5
1
1
December
5.6
2
1
3
16
Average
2.7
1.3
1.1
2.9
3.9
7.1
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
14.4
14
16
15
13
13
February
14.4
14
16
15
14
14
March
14.1
14
16
14
13
14
April
13.0
13
14
14
12
May
11.4
9
13
13
10
June
10.5
11
10
10
11
July
9.9
10
10
10
11
August
8.4
9
11
9
7
September
9.6
7
14
11
12
October
11.0
12
11
10
11
November
11.9
12
13
12
11
December
13.6
12
13
15
15
Average
12.8
13.6
11.7
12.6
11.7
11.7
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
082°
143°
070°
086°
097°
February
135°
132°
083°
095°
124°
March
114°
122°
123°
105°
136°
April
106°
121°
102°
111°
May
117°
139°
116°
128°
June
158°
133°
131°
118°
July
152°
152°
146°
161°
August
123°
168°
143°
132°
September
099°
007°
142°
043°
October
060°
079°
093°
037°
November
052°
093°
072°
074°
December
069°
131°
148°
089°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.