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
93.9
96
83
99
100
97
February
92.9
83
91
100
98
99
March
93.5
95
84
98
97
95
April
96.2
88
97
99
99
May
93.9
83
96
95
96
June
93.1
95
97
96
92
July
96.6
95
95
96
99
August
97.7
97
99
98
98
September
96.9
93
100
97
92
October
97.0
98
94
96
95
November
95.6
99
96
90
100
December
93.9
92
88
84
98
Average
94.7
91.1
91.8
96.6
95.6
96.5
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
19.9
19
17
22
21
20
February
20.0
18
19
23
22
22
March
21.1
20
18
25
22
19
April
25.3
25
26
26
24
May
25.5
23
27
26
29
June
29.8
26
33
31
30
July
34.1
36
33
34
33
August
34.4
35
36
34
36
September
32.3
29
35
32
36
October
29.3
30
29
27
31
November
25.1
25
22
27
25
December
20.2
21
17
18
22
Average
25.6
18.9
25.4
27.5
26.6
27.2
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
9.2
9
8
10
10
9
February
8.7
9
7
11
10
9
March
10.1
10
9
12
9
9
April
12.9
12
14
13
14
May
14.2
16
15
15
16
June
16.5
15
18
17
17
July
19.5
20
19
20
18
August
20.0
20
21
20
21
September
18.8
19
22
18
19
October
15.5
16
17
14
17
November
11.4
12
10
13
11
December
8.9
10
8
8
10
Average
13.2
8.9
13.6
14.7
13.8
14.0
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
2020
January
6.2
6
15
1
2
0
February
7.2
17
14
0
0
0
March
8.2
8
17
3
4
11
April
1.1
0
0
0
7
May
0.9
0
0
0
1
June
0.0
0
0
1
0
July
0.0
0
0
0
0
August
0.6
4
0
0
0
September
0.1
1
1
0
0
October
0.6
0
0
3
0
November
2.3
5
4
0
1
December
5.1
8
4
13
3
Average
3.4
10.3
5.2
0.9
1.8
1.9
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
6.2
6
6
7
8
6
February
6.1
4
7
8
8
6
March
6.0
6
6
7
6
5
April
6.0
5
7
6
6
May
5.3
5
6
5
5
June
4.9
5
5
5
5
July
4.9
5
5
5
5
August
4.8
5
5
5
5
September
4.3
4
5
4
3
October
5.3
5
4
5
4
November
5.2
6
7
5
4
December
5.6
5
4
4
7
Average
5.4
5.3
5.4
5.8
5.4
5.0
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
021°
045°
006°
013°
357°
February
141°
068°
020°
359°
031°
March
147°
144°
030°
131°
156°
April
122°
071°
147°
147°
May
149°
141°
152°
153°
June
144°
140°
139°
149°
July
133°
134°
142°
142°
August
135°
140°
150°
144°
September
155°
145°
147°
149°
October
056°
135°
143°
131°
November
003°
004°
029°
119°
December
001°
148°
130°
001°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.