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
95.5
93
96
91
99
95
February
97.3
97
99
99
96
95
March
96.0
88
100
97
96
94
April
97.4
98
96
98
98
95
May
95.4
96
96
98
97
98
June
97.6
97
99
96
96
98
July
97.5
96
94
99
100
94
August
94.0
96
84
98
93
97
September
95.1
97
91
96
94
October
92.9
91
97
85
92
November
92.0
99
89
92
95
December
95.8
98
91
96
97
Average
95.5
94.9
95.8
95.4
95.2
95.3
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
33.6
32
32
32
33
33
February
32.9
32
33
31
31
32
March
32.9
31
32
34
32
30
April
30.9
31
30
31
29
29
May
29.4
32
28
29
28
28
June
28.7
30
29
27
27
29
July
28.0
28
27
30
26
28
August
26.6
28
17
28
28
27
September
29.7
29
28
29
30
October
28.1
18
31
26
28
November
29.4
28
29
28
29
December
31.6
32
30
30
31
Average
30.1
30.4
27.9
29.8
28.9
29.4
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
22.9
24
23
23
23
23
February
22.7
23
23
23
21
24
March
22.3
24
23
23
22
20
April
20.3
23
21
20
19
18
May
18.4
22
17
18
18
17
June
17.1
19
16
17
17
18
July
15.6
17
15
17
14
17
August
15.7
17
10
17
17
16
September
18.9
20
18
20
20
October
19.5
13
21
20
21
November
19.8
18
20
20
20
December
21.9
23
22
21
23
Average
19.6
21.0
18.3
19.7
19.3
19.7
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
2020
January
5.6
8
6
11
1
8
February
4.4
3
0
4
6
11
March
4.1
9
1
2
2
8
April
3.9
2
7
3
2
7
May
4.5
2
3
2
3
3
June
2.6
4
2
3
4
3
July
2.6
2
10
1
0
5
August
5.5
4
13
3
7
2
September
4.3
1
8
1
5
October
7.6
8
3
19
6
November
8.7
1
11
10
6
December
7.3
3
9
8
8
Average
5.1
4.5
4.4
4.9
5.4
6.2
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
2021
2020
January
7.3
6
7
7
9
6
February
6.4
7
6
6
7
6
March
6.4
7
7
7
6
6
April
5.9
7
6
6
6
5
May
5.8
7
6
6
5
6
June
5.8
7
5
5
6
6
July
6.1
6
6
7
6
6
August
7.4
8
7
7
8
7
September
8.2
10
7
8
7
October
7.5
7
7
7
7
November
6.9
8
7
7
6
December
6.5
7
7
6
6
Average
6.7
6.8
6.9
6.8
6.7
6.2
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
127°
073°
083°
091°
138°
February
103°
078°
116°
105°
082°
March
145°
097°
089°
101°
156°
April
120°
150°
156°
182°
167°
May
097°
129°
140°
157°
091°
June
058°
090°
131°
102°
088°
July
185°
064°
071°
167°
077°
August
092°
099°
104°
094°
108°
September
078°
137°
108°
086°
October
098°
098°
110°
112°
November
126°
137°
136°
118°
December
117°
098°
131°
097°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.