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
95.2
96
96
88
99
97
February
95.6
96
94
93
97
98
March
96.8
95
96
97
97
98
April
96.7
95
96
97
97
May
97.6
96
99
99
97
June
95.9
94
91
99
98
July
96.2
96
87
99
98
August
97.7
97
98
98
99
September
96.0
95
91
97
98
October
96.7
91
98
98
97
November
93.8
96
87
95
96
December
93.5
93
88
95
97
Average
96.1
95.3
94.8
93.0
97.5
97.4
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
23.3
23
25
22
23
25
February
25.6
23
27
24
26
25
March
26.3
27
28
28
27
27
April
27.9
29
27
28
29
May
29.4
29
30
29
30
June
31.2
31
31
31
31
July
32.2
33
32
32
32
August
31.9
33
32
32
32
September
30.8
31
31
31
30
October
29.0
29
29
29
29
November
26.3
26
28
25
27
December
24.3
24
25
26
23
Average
27.8
24.4
28.6
28.3
28.1
28.3
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
12.3
14
13
11
11
13
February
14.7
12
16
14
15
14
March
15.3
16
16
18
15
16
April
18.0
20
19
16
19
May
20.2
20
20
20
20
June
22.6
21
22
24
24
July
22.9
24
21
21
24
August
23.6
25
23
24
23
September
23.1
23
21
22
24
October
21.4
22
19
20
23
November
17.8
18
20
16
20
December
14.1
16
17
15
12
Average
18.3
14.2
19.3
18.8
18.2
19.3
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
2020
January
3.7
5
2
4
1
3
February
3.1
6
3
2
3
3
March
2.1
4
2
2
1
0
April
3.0
4
2
2
6
May
4.9
4
2
1
8
June
6.2
2
8
6
5
July
3.5
3
2
4
5
August
4.8
3
5
5
6
September
6.2
6
11
4
5
October
4.9
7
2
1
6
November
7.1
6
11
8
11
December
4.7
12
4
4
2
Average
4.5
4.6
4.2
4.6
3.3
5.0
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
8.1
9
7
7
8
9
February
8.7
7
9
9
10
9
March
9.0
8
9
10
9
10
April
9.5
10
10
9
9
May
8.5
7
9
9
9
June
7.0
7
7
9
7
July
6.6
6
8
7
7
August
7.1
7
8
7
7
September
6.8
6
7
5
8
October
7.6
7
6
7
8
November
7.1
8
7
7
9
December
7.4
8
6
6
7
Average
7.8
8.1
7.4
7.8
7.7
8.1
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
148°
159°
334°
232°
105°
February
069°
137°
096°
149°
129°
March
127°
116°
123°
110°
120°
April
108°
102°
114°
142°
May
086°
112°
097°
104°
June
173°
110°
128°
108°
July
155°
124°
129°
121°
August
125°
116°
117°
119°
September
077°
109°
088°
104°
October
045°
049°
083°
093°
November
054°
063°
020°
080°
December
070°
050°
122°
009°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.