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
-22.2
-22
-19
-26
-16
-21
February
-24.0
-19
-26
-27
-22
-22
March
-16.6
-15
-20
-16
-15
-17
April
-8.8
-5
-7
-9
-9
May
2.5
13
2
1
-2
June
15.0
18
15
13
13
July
20.0
22
20
20
20
August
17.0
22
17
17
17
September
9.7
15
12
10
6
October
-1.9
4
2
4
-4
November
-14.7
-11
-12
-9
-16
December
-20.9
-11
-22
-22
-20
Average
-6.4
-19.6
0.4
-3.5
-3.9
-5.7
Average highest temperature per day
The maximum temperature is typically observed some hours after noon.