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
89.1
93
82
93
82
93
February
88.1
98
89
90
74
88
March
91.6
89
93
87
94
85
April
92.8
91
85
97
94
May
93.0
91
94
98
91
June
93.7
91
97
92
97
July
93.1
93
94
92
96
August
91.0
93
90
86
91
September
92.0
97
96
90
88
October
92.3
94
94
95
92
November
89.8
78
92
100
89
December
86.6
90
91
83
88
Average
91.5
92.9
90.5
91.8
90.6
91.2
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
15.8
16
18
15
15
17
February
19.4
18
22
20
16
17
March
21.7
22
21
23
22
23
April
24.9
25
24
25
25
May
28.6
26
30
28
28
June
31.1
30
33
31
30
July
32.3
33
33
31
34
August
31.9
33
31
31
32
September
29.9
29
29
29
28
October
25.4
24
24
26
26
November
19.3
18
21
19
22
December
16.7
17
17
21
15
Average
23.8
18.4
24.1
25.1
24.4
25.0
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
5.0
4
6
3
5
8
February
7.8
5
9
7
6
7
March
9.5
10
10
10
10
12
April
12.1
13
10
12
13
May
17.3
16
19
16
17
June
21.0
20
22
21
21
July
22.3
23
23
22
23
August
22.1
22
22
21
23
September
19.7
18
19
18
20
October
14.5
12
12
15
17
November
7.8
5
11
6
12
December
6.6
6
8
9
4
Average
12.7
6.3
12.9
13.8
13.3
14.7
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
2020
January
3.5
2
5
4
6
3
February
3.2
4
3
1
8
5
March
3.1
6
3
3
2
7
April
1.9
3
1
2
3
May
1.8
4
1
1
1
June
1.8
2
1
2
1
July
1.1
2
1
1
2
August
2.1
4
2
1
1
September
2.5
2
3
2
4
October
1.7
2
0
3
0
November
3.2
4
4
2
2
December
4.4
5
2
4
3
Average
2.6
4.1
3.2
1.7
2.7
2.5
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
3.3
4
3
3
2
4
February
3.2
3
3
4
2
3
March
3.6
3
4
4
3
3
April
3.7
4
3
3
4
May
3.3
4
3
2
3
June
2.3
3
1
2
3
July
1.9
2
1
1
3
August
1.7
2
1
1
2
September
2.1
2
2
1
3
October
2.4
2
3
1
3
November
2.8
2
4
3
3
December
2.7
3
3
2
3
Average
2.9
3.7
2.9
2.6
1.8
3.1
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
259°
227°
326°
262°
098°
February
286°
232°
153°
253°
292°
March
107°
195°
191°
065°
174°
April
123°
160°
185°
189°
May
014°
142°
148°
151°
June
137°
122°
159°
122°
July
172°
173°
177°
155°
August
132°
141°
138°
152°
September
042°
016°
063°
041°
October
359°
044°
083°
098°
November
014°
048°
006°
033°
December
005°
016°
318°
283°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.