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
92.2
91
90
91
96
93
February
90.3
91
96
85
91
88
March
95.8
92
97
94
96
98
April
96.6
98
92
96
96
May
97.2
98
98
100
98
June
96.9
96
96
98
97
July
97.2
97
97
97
98
August
96.6
96
97
99
96
September
97.1
96
95
96
97
October
97.5
96
98
99
98
November
91.3
88
83
93
94
December
90.2
93
87
86
95
Average
94.8
91.1
95.1
93.3
95.8
95.9
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
21.5
21
23
21
21
23
February
24.9
22
26
24
25
25
March
25.9
26
27
27
26
29
April
28.3
29
28
28
29
May
30.6
30
31
31
31
June
31.8
32
32
32
33
July
32.5
34
33
33
33
August
32.6
33
32
33
33
September
31.8
32
30
31
32
October
29.7
29
28
30
30
November
25.4
25
26
24
27
December
23.1
22
24
25
21
Average
27.6
23.0
28.4
28.1
28.1
28.7
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
12.6
12
14
12
13
15
February
15.4
12
16
14
15
16
March
15.6
18
18
8
17
19
April
18.5
21
12
19
21
May
21.9
21
23
22
22
June
23.8
23
25
24
25
July
24.9
26
24
25
25
August
25.3
25
24
26
26
September
24.1
24
23
24
24
October
22.3
21
20
23
23
November
17.4
17
19
16
19
December
14.6
15
17
17
12
Average
19.0
14.1
20.0
18.4
19.9
20.5
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
2020
January
2.6
3
1
4
1
2
February
2.9
8
1
3
4
3
March
1.6
2
1
4
2
0
April
2.4
2
3
3
6
May
2.7
2
1
0
1
June
3.8
2
3
4
5
July
4.1
2
2
4
4
August
3.9
3
3
4
3
September
5.4
3
9
6
11
October
2.7
3
1
2
4
November
4.7
10
9
3
4
December
3.1
6
1
0
2
Average
3.4
4.0
2.7
3.5
2.6
3.6
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
8.7
9
8
9
9
8
February
8.8
9
9
8
10
10
March
9.3
9
10
10
10
9
April
9.3
10
9
9
10
May
8.2
8
8
9
8
June
7.3
9
7
8
7
July
6.8
7
7
7
8
August
6.7
7
6
8
6
September
6.9
6
7
6
8
October
7.8
8
6
7
8
November
7.6
8
8
7
9
December
7.7
9
7
7
8
Average
8.0
9.1
8.1
7.6
8.0
8.2
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
336°
162°
351°
259°
078°
February
242°
205°
029°
231°
179°
March
187°
228°
189°
180°
175°
April
173°
088°
213°
230°
May
359°
286°
083°
350°
June
264°
311°
185°
032°
July
279°
168°
231°
249°
August
262°
099°
161°
123°
September
046°
025°
021°
083°
October
021°
016°
026°
066°
November
032°
009°
020°
057°
December
027°
042°
103°
026°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.