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
0.0
0
0
0
0
0
February
0.0
0
0
0
0
0
March
0.0
0
0
0
0
0
April
0.0
0
0
0
0
May
0.0
0
0
0
0
June
0.0
0
0
0
0
July
0.0
0
0
0
0
August
0.0
0
0
0
0
September
0.0
0
0
0
0
October
0.0
0
0
0
0
November
0.0
0
0
0
0
December
0.0
0
0
0
0
Average
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
-24.5
-26
-21
-28
-22
-23
February
-25.4
-22
-27
-29
-29
-25
March
-20.7
-18
-19
-19
-22
-21
April
-11.1
-8
-6
-13
-11
May
0.4
10
2
-2
-3
June
12.7
16
16
11
11
July
17.9
21
20
18
18
August
15.0
15
17
15
15
September
6.9
9
10
7
5
October
-3.1
1
-3
1
-4
November
-15.1
-13
-13
-12
-17
December
-22.9
-15
-25
-27
-22
Average
-8.8
-22.1
-3.5
-5.9
-7.7
-7.7
Average highest temperature per day
The maximum temperature is typically observed some hours after noon.