Percent Hours with Flying Weather - Other Weather

Fresno

The following values are percentages of occurrance in different flying classes. The values are derived from observations taken over a 43 year period between 1948 and 1990. * is a value greater than zero but less than 0.5 percent.
Total Skycover <= 3/10 & Visibility >= 2½ miles
Hour Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann #yrs
1 am 27 47 57 66 76 87 89 89 85 79 53 29 65 42
4 am 25 42 53 64 73 82 86 87 84 77 51 26 63 42
7 am 16 26 39 53 66 77 84 81 77 65 30 16 53 42
10 am 17 30 42 50 64 76 85 81 79 66 38 17 54 42
1 pm 19 28 34 44 60 75 86 83 79 65 40 19 53 42
4 pm 26 34 37 44 56 74 84 81 77 65 43 25 54 42
7 pm 34 43 45 52 62 74 83 81 79 70 51 34 59 42
10 pm 32 49 56 62 74 84 89 89 84 78 53 31 65 42
ALL 25 38 45 54 66 79 86 84 80 70 45 25 58 42


SFC wind speeds 4-10 knots, Temps 33-89oF & no Precipitation
Hour Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann #yrs
1 am 43 48 57 63 69 73 80 77 62 48 39 40 58 42
4 am 35 46 56 57 66 70 63 57 56 47 38 34 52 42
7 am 37 42 53 59 69 67 56 55 54 48 41 33 51 42
10 am 55 62 64 72 74 73 68 73 75 72 56 50 66 42
1 pm 59 62 66 69 65 48 19 27 51 68 58 53 54 42
4 pm 60 59 65 64 53 31 8 16 40 63 57 55 47 42
7 pm 51 57 69 72 64 46 30 58 80 58 46 49 57 42
10 pm 48 52 56 61 63 65 74 79 71 53 48 47 60 42
ALL 48 54 61 64 65 59 50 55 61 57 48 45 56 42


Ceiling >= 1000 feet, visibility >= 2½ miles & wind <= 10 knots
Hour Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann #yrs
1 am 61 83 92 91 85 85 94 95 96 96 82 58 85 42
4 am 58 78 91 93 94 95 98 99 98 96 78 54 86 42
7 am 51 66 85 89 92 92 98 99 98 91 64 45 81 42
10 am 50 72 83 88 91 95 99 99 97 93 72 45 82 42
1 pm 63 79 84 88 90 94 97 98 98 95 83 57 85 42
4 pm 73 83 82 80 78 79 85 92 93 93 88 66 83 42
7 pm 77 90 91 84 75 73 83 91 96 96 92 73 85 42
10 pm 69 88 92 85 72 69 81 89 93 95 86 63 82 42
ALL 63 80 88 87 85 85 92 95 96 94 81 57 84 42