KMAF Aviation Climatology
The following values are percent of occurrence of different flying weather conditions.
The data was derived from 31 years of data (1973-2004).
Ceiling between 1000-3000 feet and/or Visibility between 3-5 miles (MVFR)
Hour |
Jan |
Feb |
Mar |
Apr |
May |
Jun |
July |
Aug |
Sep |
Oct |
Nov |
Dec |
Ann |
1 am |
7 % |
6 % |
6 % |
4 % |
4 % |
1 % |
1 % |
2 % |
4 % |
5 % |
5 % |
5 % |
4.2% |
4 am |
6 % |
6 % |
7 % |
5 % |
5 % |
2 % |
1 % |
2 % |
4 % |
6 % |
7 % |
6 % |
4.8% |
7 am |
6 % |
7 % |
10 % |
7 % |
9 % |
3 % |
2 % |
1 % |
5 % |
8 % |
8 % |
7 % |
6.1% |
10 am |
7 % |
8 % |
10 % |
11% |
12% |
9 % |
4 % |
3 % |
9 % |
9 % |
8 % |
8 % |
8.2% |
1 pm |
8 % |
8 % |
12 % |
12% |
16% |
13% |
8 % |
7 % |
14% |
11% |
10% |
8 % |
6.6% |
4 pm |
8 % |
8 % |
10 % |
10% |
12% |
10% |
7 % |
7 % |
12% |
12% |
9 % |
6 % |
8.7% |
7 pm |
9 % |
9 % |
8 % |
7 % |
7 % |
5 % |
4 % |
3 % |
9 % |
9 % |
8 % |
8 % |
7.2% |
10 pm |
8 % |
8 % |
7 % |
4 % |
5 % |
2 % |
2 % |
2 % |
5 % |
5 % |
7 % |
7 % |
5.2% |
Ceiling greater than or = 500 feet to less than 1000 feet and/or Visibility greater than or = to 1mile to less than 3 miles (IFR)
Hour |
Jan |
Feb |
Mar |
Apr |
May |
Jun |
July |
Aug |
Sep |
Oct |
Nov |
Dec |
Ann |
1 am |
3 % |
3 % |
2 % |
1 % |
1 % |
0 % |
0 % |
0 % |
2 % |
2 % |
3 % |
3 % |
1.7% |
4 am |
3 % |
4 % |
2 % |
1 % |
1 % |
0 % |
0 % |
0 % |
2 % |
3 % |
3 % |
4 % |
1.9% |
7 am |
4 % |
5 % |
3 % |
1 % |
1 % |
1 % |
1 % |
1 % |
3 % |
4 % |
5 % |
4 % |
2.8% |
10 am |
4 % |
7 % |
4 % |
4 % |
3 % |
1 % |
2 % |
2 % |
4 % |
6 % |
5 % |
4 % |
3.8% |
1 pm |
6 % |
7 % |
4 % |
6 % |
5 % |
2 % |
2 % |
2 % |
5 % |
7 % |
6 % |
3 % |
4.6% |
4 pm |
7 % |
6 % |
4 % |
3 % |
2 % |
1 % |
1 % |
1 % |
5 % |
6 % |
5 % |
5 % |
3.8% |
7 pm |
5 % |
6 % |
3 % |
1 % |
1 % |
0 % |
0 % |
0 % |
3 % |
3 % |
4 % |
4 % |
2.5% |
10 pm |
4 % |
3 % |
2 % |
2 % |
1 % |
0 % |
1 % |
0 % |
2 % |
2 % |
2 % |
4 % |
1.9% |
Ceiling greater than or = to 200 feet to less than 500 feet and/or Visibility greater than or = to 1/2 mile to less than 1 mile (LIFR)
Hour |
Jan |
Feb |
Mar |
Apr |
May |
Jun |
July |
Aug |
Sep |
Oct |
Nov |
Dec |
Ann |
1 am |
4 % |
2 % |
1 % |
0 % |
0 % |
0 % |
0 % |
0 % |
0 % |
0 % |
2 % |
2 % |
0.9% |
4 am |
4 % |
2 % |
1 % |
1 % |
0 % |
0 % |
0 % |
0 % |
1 % |
1 % |
2 % |
2 % |
1.2% |
7 am |
4 % |
3 % |
2 % |
1 % |
1 % |
0 % |
0 % |
0 % |
2 % |
2 % |
3 % |
2 % |
1.7% |
10 am |
5 % |
4 % |
2 % |
1 % |
1 % |
0 % |
0 % |
0 % |
3 % |
3 % |
5 % |
4 % |
2.3% |
1 pm |
6 % |
5 % |
3 % |
2 % |
1 % |
1 % |
1 % |
1 % |
4 % |
4 % |
6 % |
4 % |
3.2% |
4 pm |
6 % |
5 % |
2 % |
1 % |
1 % |
0 % |
0 % |
0 % |
2 % |
2 % |
4 % |
4 % |
2.3% |
7 pm |
4 % |
2 % |
1 % |
0 % |
0 % |
0 % |
0 % |
0 % |
1 % |
1 % |
2 % |
2 % |
1.1% |
10 pm |
3 % |
2 % |
0 % |
1 % |
0 % |
0 % |
0 % |
0 % |
0 % |
0 % |
2 % |
1 % |
0.8% |
Ceiling less than 200 feet and/or Visibility less than 1/2 mile (VLIFR)
Hour |
Jan |
Feb |
Mar |
Apr |
May |
Jun |
July |
Aug |
Sep |
Oct |
Nov |
Dec |
Ann |
1 am |
1 % |
1 % |
1 % |
0 % |
0 % |
0 % |
0 % |
0 % |
0 % |
0 % |
1 % |
1 % |
0.4% |
4 am |
3 % |
2 % |
1 % |
0 % |
0 % |
0 % |
0 % |
0 % |
0 % |
0 % |
1 % |
2 % |
0.8% |
7 am |
4 % |
2 % |
1 % |
0 % |
0 % |
0 % |
0 % |
0 % |
0 % |
1 % |
2 % |
3 % |
1.1% |
10 am |
6 % |
4 % |
1 % |
1 % |
0 % |
0 % |
0 % |
0 % |
0 % |
2 % |
3 % |
3 % |
1.7% |
1 pm |
5 % |
6 % |
2 % |
1 % |
1 % |
0 % |
0 % |
0 % |
1 % |
3 % |
3 % |
4 % |
2.2% |
4 pm |
3 % |
3 % |
0 % |
0 % |
0 % |
0 % |
0 % |
0 % |
0 % |
0 % |
1 % |
2 % |
0.8% |
7 pm |
1 % |
1 % |
0 % |
0 % |
0 % |
0 % |
0 % |
0 % |
0 % |
0 % |
0 % |
1 % |
0.3% |
10 pm |
1 % |
0 % |
0 % |
0 % |
0 % |
0 % |
0 % |
0 % |
0 % |
0 % |
1 % |
0 % |
0.2% |
Ceiling less than or = to 3000 feet and/or Visibility less than or = to 5 miles
Hour |
Jan |
Feb |
Mar |
Apr |
May |
Jun |
July |
Aug |
Sep |
Oct |
Nov |
Dec |
Ann |
1 am |
15% |
12% |
10% |
5 % |
5 % |
0 % |
0 % |
0 % |
0 % |
0 % |
1 % |
1 % |
0.4% |
4 am |
16% |
14% |
11% |
0 % |
6 % |
0 % |
0 % |
0 % |
0 % |
0 % |
1 % |
2 % |
0.8% |
7 am |
18% |
17% |
16% |
0 % |
11% |
0 % |
0 % |
0 % |
0 % |
1 % |
2 % |
3 % |
1.1% |
10 am |
22% |
23% |
17% |
1 % |
16% |
0 % |
0 % |
0 % |
0 % |
2 % |
3 % |
3 % |
1.7% |
1 pm |
25% |
26% |
21% |
1 % |
1 % |
0 % |
0 % |
0 % |
1 % |
3 % |
3 % |
4 % |
2.2% |
4 pm |
24% |
22% |
16% |
0 % |
0 % |
0 % |
0 % |
0 % |
0 % |
0 % |
1 % |
2 % |
0.8% |
7 pm |
19% |
18% |
12% |
0 % |
0 % |
0 % |
0 % |
0 % |
0 % |
0 % |
0 % |
1 % |
0.3% |
10 pm |
16% |
13% |
9 % |
0 % |
0 % |
0 % |
0 % |
0 % |
0 % |
0 % |
1 % |
0 % |
0.2% |
Ceiling less than 1000 feet and/or Visibility less than 3 miles
Hour |
Jan |
Feb |
Mar |
Apr |
May |
Jun |
July |
Aug |
Sep |
Oct |
Nov |
Dec |
Ann |
1 am |
8% |
12% |
4% |
1 % |
1 % |
0 % |
0 % |
0 % |
2 % |
2 % |
6 % |
6 % |
3.5% |
4 am |
10% |
8% |
4% |
2 % |
1 % |
0 % |
0 % |
0 % |
3 % |
4 % |
6 % |
8 % |
3.8% |
7 am |
12% |
10% |
6% |
2 % |
2 % |
1 % |
1 % |
1 % |
5 % |
7 % |
10% |
9 % |
5.5% |
10 am |
15% |
15% |
7% |
6 % |
4 % |
1 % |
2 % |
2 % |
7 % |
11% |
13% |
11% |
7.8% |
1 pm |
17% |
18% |
9% |
9 % |
7 % |
3 % |
3 % |
3 % |
10% |
14% |
15% |
11% |
9.9% |
4 pm |
16% |
14% |
6% |
4 % |
3 % |
1 % |
1 % |
1 % |
7 % |
8 % |
10% |
11% |
6.8% |
7 pm |
10% |
9% |
4% |
1 % |
1 % |
0 % |
0 % |
0 % |
4 % |
4 % |
6% |
7 % |
3.8% |
10 pm |
8% |
5% |
2 % |
3 % |
1 % |
0 % |
1 % |
0 % |
2 % |
2 % |
5% |
5 % |
2.8% |
Ceiling less than 500 feet and/or Visibility less than 1 mile
Hour |
Jan |
Feb |
Mar |
Apr |
May |
Jun |
July |
Aug |
Sep |
Oct |
Nov |
Dec |
Ann |
1 am |
4 % |
2 % |
1 % |
0 % |
0 % |
0 % |
0 % |
0 % |
0 % |
0 % |
2 % |
2 % |
0.9% |
4 am |
4 % |
2 % |
1 % |
1 % |
0 % |
0 % |
0 % |
0 % |
1 % |
1 % |
2 % |
2 % |
1.2% |
7 am |
4 % |
3 % |
2 % |
1 % |
1 % |
0 % |
0 % |
0 % |
2 % |
2 % |
3 % |
2 % |
1.7% |
10 am |
5 % |
4 % |
2 % |
1 % |
1 % |
0 % |
0 % |
0 % |
3 % |
3 % |
5 % |
4 % |
2.3% |
1 pm |
6 % |
5 % |
3 % |
2 % |
1 % |
1 % |
1 % |
1 % |
4 % |
4 % |
6 % |
4 % |
3.2% |
4 pm |
6 % |
5 % |
2 % |
1 % |
1 % |
0 % |
0 % |
0 % |
2 % |
2 % |
4 % |
4 % |
2.3% |
7 pm |
4 % |
2 % |
1 % |
0 % |
0 % |
0 % |
0 % |
0 % |
1 % |
1 % |
2 % |
2 % |
1.1% |
10 pm |
3 % |
2 % |
0 % |
1 % |
0 % |
0 % |
0 % |
0 % |
0 % |
0 % |
2 % |
1 % |
0.8% |
Ceiling less than 200 feet and/or Visibility less than 1/2 mile
Hour |
Jan |
Feb |
Mar |
Apr |
May |
Jun |
July |
Aug |
Sep |
Oct |
Nov |
Dec |
Ann |
1 am |
1 % |
1 % |
1 % |
0 % |
0 % |
0 % |
0 % |
0 % |
0 % |
0 % |
1 % |
1 % |
0.4% |
4 am |
3 % |
2 % |
1 % |
0 % |
0 % |
0 % |
0 % |
0 % |
0 % |
0 % |
1 % |
2 % |
0.8% |
7 am |
4 % |
2 % |
1 % |
0 % |
0 % |
0 % |
0 % |
0 % |
0 % |
1 % |
2 % |
3 % |
1.1% |
10 am |
6 % |
4 % |
1 % |
1 % |
0 % |
0 % |
0 % |
0 % |
0 % |
2 % |
3 % |
3 % |
1.7% |
1 pm |
5 % |
6 % |
2 % |
1 % |
1 % |
0 % |
0 % |
0 % |
1 % |
3 % |
3 % |
4 % |
2.2% |
4 pm |
3 % |
3 % |
0 % |
0 % |
0 % |
0 % |
0 % |
0 % |
0 % |
0 % |
1 % |
2 % |
0.8% |
7 pm |
1 % |
1 % |
0 % |
0 % |
0 % |
0 % |
0 % |
0 % |
0 % |
0 % |
0 % |
1 % |
0.3% |
10 pm |
1 % |
0 % |
0 % |
0 % |
0 % |
0 % |
0 % |
0 % |
0 % |
0 % |
1 % |
0 % |
0.2% |