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
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
June
0
0
0
0
July
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
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
-27.7
-25
-29
-28
-20
-29
February
-29.7
-24
-32
-30
-26
-31
March
-26.3
-24
-24
-24
-26
-28
April
-18.2
-19
-18
-14
-18
May
-7.5
-5
-7
-8
-7
June
2.2
3
2
2
3
July
7.7
11
10
6
10
August
5.4
5
7
6
5
September
-1.0
0
0
-2
-2
October
-8.7
-5
-9
-2
-8
November
-18.5
-15
-21
-17
-16
December
-22.9
-17
-20
-22
-21
Average
-13.3
-25.8
-11.9
-12.9
-11.8
-12.3
Average highest temperature per day
The maximum temperature is typically observed some hours after noon.