| Cloud Cover | | Overcast | 90% covered | 80% covered | 70% covered | 60% covered | 50% covered | 40% covered | 30% covered | 20% covered | 10% covered | 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 |
|
| Wind | | >45 mph | 29 to 45 mph | 17 to 28 mph | 12 to 16 mph | 6 to 11 mph | 0 to 5 mph |
|
| Humidity | | <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 90% | 90% to 95% | 95% to 100% |
|
| Temperature | | < -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 | >113F |
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