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
94
91
77
89
February
79.1
72
86
74
March
83.8
77
85
82
89
April
72.6
51
87
70
May
88.5
94
92
June
94.3
97
97
100
July
97.4
100
98
99
94
August
98.1
98
98
99
100
September
96.6
99
99
0
October
96.0
99
November
95.6
96
97
December
95.8
98
98
Average
88.7
63.0
95.0
92.2
90.8
86.0
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
22.4
24
21
23
23
February
22.1
22
21
22
March
26.2
25
23
23
24
April
31.5
26
26
25
May
33.0
28
27
June
32.8
31
30
29
July
31.4
34
31
31
31
August
32.3
33
31
32
33
September
31.5
32
32
0
October
30.0
29
November
25.9
26
25
December
24.4
26
25
Average
28.0
25.1
28.2
27.0
26.8
24.7
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
18.3
21
17
21
19
February
17.4
16
16
18
March
23.0
21
20
20
21
April
28.6
23
23
21
May
29.7
25
24
June
29.0
27
27
28
July
27.8
34
27
27
27
August
28.1
27
27
29
28
September
26.7
27
26
0
October
25.2
25
November
21.0
22
20
December
20.4
22
23
Average
24.1
21.9
24.0
23.3
23.3
21.3
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
2020
January
0.0
0
0
0
0
February
0.0
0
0
0
March
0.0
0
0
0
0
April
0.0
0
0
0
May
0.0
0
0
June
0.0
0
0
0
July
0.0
0
0
0
0
August
0.0
0
0
0
0
September
0.0
0
0
0
October
0.0
0
November
0.0
0
0
December
0.0
0
0
Average
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
14.8
15
15
14
15
February
13.7
14
13
13
March
13.9
15
15
13
13
April
14.5
15
15
16
May
12.0
12
14
June
10.3
9
10
14
July
8.4
9
8
9
10
August
8.2
9
9
8
4
September
10.6
10
8
0
October
12.5
12
November
12.1
17
11
December
12.8
13
12
Average
12.1
15.1
12.7
12.2
11.5
12.1
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
141°
070°
138°
097°
February
093°
095°
111°
March
111°
113°
105°
123°
April
131°
122°
102°
May
149°
115°
June
127°
135°
164°
July
081°
166°
147°
161°
August
136°
152°
150°
038°
September
070°
089°
360°
October
089°
November
085°
074°
December
123°
162°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.