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
96.4
92
99
96
99
99
February
95.9
96
95
91
98
100
March
98.3
100
99
100
99
100
April
99.0
99
99
100
100
May
98.4
99
98
100
98
June
96.7
98
95
97
99
July
98.3
99
95
97
99
August
97.1
98
100
99
100
September
97.8
98
95
99
98
October
98.8
98
100
99
99
November
98.4
97
99
97
97
December
95.3
94
100
99
99
Average
97.4
96.0
97.8
97.0
98.6
98.7
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
24.1
24
25
24
23
25
February
26.0
24
27
25
26
26
March
26.6
27
27
27
27
27
April
28.1
29
28
28
29
May
29.3
30
29
29
29
June
30.7
32
30
30
31
July
31.9
33
32
31
32
August
31.4
33
32
31
33
September
31.3
32
31
31
32
October
29.8
30
29
30
30
November
27.3
27
28
25
27
December
25.2
25
27
26
24
Average
28.1
25.2
29.1
28.4
28.0
28.8
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
17.8
9
19
18
18
21
February
18.6
15
15
18
20
22
March
20.8
17
23
23
22
23
April
22.8
24
17
24
25
May
23.8
25
25
21
22
June
26.6
28
26
25
28
July
27.4
29
27
27
28
August
26.8
29
28
28
29
September
26.9
27
26
27
28
October
24.1
26
24
22
22
November
21.6
21
24
15
24
December
18.1
8
23
21
19
Average
22.0
13.6
22.9
23.2
22.4
24.0
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
2020
January
2.0
2
1
4
1
2
February
3.5
8
1
5
3
3
March
0.9
3
0
0
0
1
April
1.9
3
2
1
0
May
3.7
3
3
2
6
June
3.7
2
11
3
3
July
2.6
1
2
4
6
August
2.8
3
3
5
2
September
5.8
6
9
6
4
October
4.6
4
5
4
8
November
3.5
5
3
4
8
December
4.9
14
2
3
3
Average
3.3
3.8
3.3
4.1
2.9
3.7
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
9.6
10
10
9
8
10
February
9.5
9
9
10
10
10
March
10.2
10
10
11
11
11
April
10.0
9
10
10
9
May
9.1
7
9
10
10
June
7.8
7
7
9
8
July
7.8
6
9
9
8
August
8.1
8
8
9
8
September
7.8
7
9
6
9
October
9.4
9
8
8
10
November
9.2
10
9
9
11
December
9.1
11
8
9
9
Average
9.0
9.6
8.3
9.1
9.0
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
063°
066°
021°
041°
064°
February
037°
104°
066°
110°
082°
March
115°
101°
095°
090°
101°
April
120°
096°
107°
141°
May
083°
108°
098°
098°
June
195°
142°
122°
115°
July
128°
118°
122°
116°
August
144°
116°
114°
126°
September
096°
123°
117°
129°
October
048°
043°
087°
096°
November
048°
059°
031°
072°
December
047°
054°
081°
051°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.