Percentage of observations where the VFR minimums for ceiling and visibility are met: visibility of 8 km 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
98.8
99
98
98
100
100
February
97.5
97
99
99
96
98
March
97.1
98
95
97
98
98
April
96.0
97
95
98
98
97
May
94.4
93
95
93
94
92
June
92.3
92
85
88
97
96
July
91.8
94
95
88
93
94
August
95.9
100
94
92
92
99
September
98.4
97
98
99
99
October
99.4
100
100
100
100
November
99.3
99
97
100
100
December
99.4
98
100
100
100
Average
96.6
96.1
95.9
95.4
97.2
97.8
Marginal VFR conditions or better during daylight period
Percentage of observations where the MVFR minimums for ceiling and visibility are met: visibility of 5 km 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
30.9
31
31
31
31
32
February
30.9
32
31
31
31
32
March
30.8
32
31
31
31
31
April
30.4
32
31
31
30
31
May
29.5
30
30
29
29
30
June
28.7
29
29
28
29
29
July
28.0
28
29
28
28
28
August
28.4
29
29
28
28
29
September
28.9
29
29
30
29
October
30.0
30
30
31
30
November
30.6
31
30
31
31
December
30.9
31
31
31
31
Average
29.8
30.4
30.0
29.5
29.8
30.1
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
23.8
25
24
24
24
25
February
23.7
25
24
24
24
25
March
23.6
25
24
24
23
24
April
23.3
25
24
24
23
24
May
23.0
24
24
23
22
24
June
22.1
22
23
22
22
23
July
21.4
22
21
22
22
22
August
21.3
21
22
21
22
21
September
21.5
22
22
22
21
October
22.6
23
23
23
22
November
23.3
24
24
24
23
December
23.8
24
24
25
24
Average
22.8
23.4
23.2
22.8
22.9
23.2
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
2020
January
2.7
3
5
5
1
1
February
4.2
4
3
1
7
4
March
5.7
4
7
8
4
7
April
7.0
5
8
5
8
7
May
9.3
11
7
12
10
11
June
10.7
9
21
15
4
8
July
11.2
10
9
16
8
9
August
6.1
2
10
10
10
4
September
3.9
8
3
3
0
October
1.5
1
1
2
3
November
1.4
2
4
1
1
December
1.3
3
1
1
2
Average
5.6
6.0
6.7
6.9
4.8
4.5
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
9.2
8
9
8
10
9
February
8.7
8
10
8
9
9
March
8.0
8
9
9
9
7
April
8.0
7
8
9
8
8
May
8.4
8
8
9
9
8
June
9.2
9
9
8
9
9
July
10.4
11
10
11
10
10
August
11.1
12
10
11
12
11
September
11.4
11
11
11
11
October
10.5
11
11
10
10
November
9.6
10
8
9
10
December
9.6
9
8
9
10
Average
9.5
8.8
9.3
9.2
9.5
9.4
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
066°
094°
097°
097°
118°
February
107°
105°
085°
089°
108°
March
110°
111°
113°
106°
091°
April
118°
110°
117°
116°
128°
May
130°
121°
125°
131°
133°
June
128°
129°
134°
141°
129°
July
130°
131°
131°
131°
130°
August
125°
120°
133°
133°
126°
September
115°
120°
120°
116°
October
106°
108°
101°
102°
November
092°
072°
082°
096°
December
096°
072°
080°
096°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.