Percentage of observations where the VFR minimums for ceiling and visibility are met: visibility of 8 km 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
93.6
99
99
97
97
88
February
96.7
97
100
98
98
90
March
95.8
97
93
98
89
95
April
97.1
98
100
99
93
92
May
98.3
100
100
99
99
99
June
96.0
98
100
96
97
88
July
93.9
94
95
100
92
96
August
91.1
93
92
98
89
79
September
94.9
94
96
97
87
October
95.4
99
97
100
95
November
92.2
93
93
85
91
December
95.3
98
93
97
99
Average
95.2
96.8
96.7
97.3
94.5
91.5
Marginal VFR conditions or better during daylight period
Percentage of observations where the MVFR minimums for ceiling and visibility are met: visibility of 5 km 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
-17.5
-16
-20
-17
-21
-15
February
-10.1
-8
-10
-10
-12
-10
March
1.1
-1
4
1
2
1
April
10.9
12
10
9
10
12
May
18.8
19
19
17
17
19
June
23.6
24
24
25
25
21
July
27.6
29
28
28
28
29
August
23.7
25
24
24
23
22
September
18.8
18
18
20
19
October
9.5
12
9
10
9
November
-6.9
-6
-5
-3
-4
December
-17.5
-16
-17
-16
-15
Average
7.4
10.5
7.3
7.6
7.0
7.3
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
-27.2
-27
-31
-27
-30
-25
February
-22.0
-22
-22
-21
-24
-22
March
-11.7
-12
-8
-10
-9
-10
April
-1.1
1
-2
-1
-1
-1
May
5.8
5
6
6
5
6
June
12.4
12
13
13
14
12
July
17.2
18
16
17
19
18
August
14.0
14
15
13
14
14
September
7.2
8
7
7
8
October
-2.2
-1
-3
-3
-1
November
-15.3
-17
-15
-11
-13
December
-26.6
-26
-27
-25
-23
Average
-4.4
-2.7
-4.0
-4.8
-4.3
-4.9
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
2020
January
9.5
11
9
11
7
4
February
8.7
7
6
12
14
9
March
5.4
4
8
9
10
8
April
4.9
4
6
2
8
9
May
8.1
7
6
11
12
6
June
8.9
6
8
9
8
20
July
6.4
6
4
6
9
4
August
10.9
5
11
9
11
24
September
7.9
5
8
6
12
October
6.8
2
1
3
11
November
11.3
10
18
16
12
December
10.1
3
10
12
7
Average
8.0
6.1
6.4
8.6
9.5
10.7
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
4.6
5
4
4
4
3
February
6.0
7
5
6
7
5
March
8.0
8
8
8
9
7
April
10.3
10
9
10
11
11
May
9.1
10
10
9
8
8
June
6.7
7
7
6
7
7
July
6.0
7
6
5
6
6
August
6.3
7
6
6
5
8
September
7.3
8
8
6
7
October
7.9
9
8
7
8
November
6.8
7
7
7
7
December
5.1
5
4
5
5
Average
7.1
7.7
7.0
6.8
6.9
7.0
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
339°
333°
360°
356°
330°
February
317°
343°
358°
346°
355°
March
323°
273°
345°
344°
286°
April
263°
340°
358°
358°
351°
May
326°
307°
355°
093°
325°
June
011°
040°
119°
134°
065°
July
158°
109°
152°
201°
171°
August
342°
047°
273°
138°
052°
September
319°
307°
198°
079°
October
317°
313°
325°
331°
November
338°
302°
353°
329°
December
308°
285°
348°
320°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.