Cover | Overcast | 98% | 80% | 70% | 60% | 50% | 40% | 30% | 20% | 10% | Clear |
Transparency | Poor | Below Average | Average | Above Average | Transparent |
Seeing | Bad [1/5] | Poor [2/5] | Average [3/5] | Good [4/5] | Excellent [5/5] |
Darkness | -4.0 | -3.0 | -2.0 | -1.0 | 0.0 | 1.0 | 2.0 | 3.0 | 3.5 | 4.0 | 4.5 | 5.0 | 5.2 | 5.4 | 5.6 | 5.8 | 6.0 |
Wind | more than 45 mph | 29 to 45 mph | 17 to 28 mph | 12 to 16 mph | 6 to 11 mph | 0 to 5 mph |
Humidity | less than 25% |
25% to 30% |
30% to 35% |
35% to 40% |
40% to 45% |
45% to 50% |
50% to 55% |
55% to 60% |
60% to 65% |
65% to 70% |
70% to 75% |
75% to 80% |
80% to 85% |
85% to 98% |
98% to 95% |
95% to 100% |
Temperature | less than -40F |
-40F to -31F |
-30F to -21F |
-21F to -12F |
-12F to -3F |
-3F to 5F |
5F to 14F |
14F to 23F |
23F to 32F |
32F to 41F |
41F to 50F |
50F to 59F |
59F to 68F |
68F to 77F |
77F to 86F |
86F to 95F |
95F to 104F |
104F to 113F |
more than 113F |