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
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
-21.2
-25
-19
-23
-21
-23
February
-21.3
-18
-24
-24
-27
-24
March
-16.6
-19
-15
-18
-19
-15
April
-9.6
-11
-8
-7
-6
May
5.2
8
6
5
4
June
15.1
18
14
18
16
July
19.6
25
20
20
14
August
14.8
17
17
15
15
September
8.5
11
9
9
8
October
-2.5
-1
-3
-1
-3
November
-12.7
-9
-9
-13
-12
December
-19.8
-16
-18
-20
-20
Average
-5.2
-21.2
-2.7
-3.4
-4.7
-4.0
Average highest temperature per day
The maximum temperature is typically observed some hours after noon.