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
99.6
100
100
100
99
100
February
98.8
99
99
99
99
100
March
98.8
100
99
97
100
97
April
98.9
99
100
99
100
97
May
98.1
97
100
99
99
100
June
99.5
98
100
100
100
100
July
99.4
98
100
100
99
100
August
98.4
97
99
98
96
99
September
95.0
99
99
98
100
99
October
96.7
99
99
99
100
99
November
87.3
99
100
98
99
98
December
94.2
99
100
99
99
Average
97.1
98.7
99.4
98.8
99.3
99.0
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
28.3
29
28
28
29
28
February
28.2
28
28
28
29
29
March
27.4
24
29
28
29
28
April
26.5
9
29
28
29
30
May
26.2
6
30
29
30
31
June
29.7
20
31
31
31
32
July
31.5
31
32
31
32
32
August
31.6
31
32
32
32
32
September
31.2
32
32
31
30
32
October
30.6
31
31
31
30
31
November
26.5
30
30
30
30
30
December
27.6
29
29
29
29
Average
28.7
24.6
30.1
29.6
29.8
30.2
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
23.4
24
24
23
24
24
February
22.8
24
23
23
24
24
March
22.5
18
24
24
24
23
April
21.7
7
24
24
25
24
May
21.9
4
27
25
26
26
June
25.2
16
27
26
26
27
July
26.5
26
28
26
26
27
August
26.6
27
28
27
30
27
September
26.7
27
28
27
27
27
October
25.6
27
27
26
26
26
November
21.9
25
26
25
25
25
December
22.9
24
24
24
24
Average
23.9
20.3
25.7
25.0
25.3
25.3
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
2020
January
3.9
5
5
2
3
6
February
5.1
7
3
9
3
4
March
3.6
2
4
3
1
8
April
4.3
6
5
4
5
3
May
3.4
2
1
3
3
2
June
3.2
3
3
1
8
4
July
3.9
6
3
4
1
8
August
5.2
6
5
4
0
5
September
5.7
4
4
9
1
11
October
5.3
6
8
6
2
6
November
4.0
9
4
5
2
6
December
4.0
7
1
3
3
Average
4.3
5.1
4.2
4.2
3.0
5.3
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
10.4
11
11
10
10
10
February
10.9
9
11
10
13
11
March
10.6
10
10
12
12
10
April
10.7
10
10
12
11
10
May
10.9
10
11
11
11
11
June
10.9
9
11
11
11
10
July
11.6
11
12
12
13
12
August
10.9
11
11
10
12
11
September
9.1
8
10
11
7
9
October
7.8
3
9
9
9
9
November
7.9
6
10
10
9
10
December
9.4
9
8
11
9
Average
10.1
8.7
10.4
10.6
10.7
10.2
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
097°
080°
102°
085°
082°
February
100°
077°
079°
094°
094°
March
093°
090°
094°
090°
081°
April
085°
114°
101°
104°
118°
May
120°
133°
111°
107°
120°
June
113°
120°
111°
092°
108°
July
098°
100°
092°
093°
094°
August
098°
108°
098°
097°
096°
September
109°
108°
109°
125°
100°
October
126°
122°
109°
118°
101°
November
105°
103°
100°
093°
099°
December
074°
036°
085°
080°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.