Time is Local Standard Time (LST)
| TIME | JAN | FEB | MAR | APR | MAY | JUN |
| 4 AM | 86% | 86% | 86% | 86% | 85% | 84% |
| 10 AM | 82% | 80% | 73% | 69% | 66% | 65% |
| 4 PM | 75% | 67% | 60% | 55% | 53% | 49% |
| 10 PM | 83% | 81% | 78% | 75% | 74% | 71% |
| TIME | JUL | AUG | SEP | OCT | NOV | DEC | Annual |
| 4 AM | 82% | 84% | 87% | 90% | 88% | 87% | 86% |
| 10 AM | 62% | 64% | 67% | 78% | 82% | 84% | 73% |
| 4 PM | 45% | 46% | 48% | 62% | 74% | 78% | 59% |
| 10 PM | 68% | 70% | 75% | 84% | 84% | 85% | 77% |
1Normals are the 30 year climatic normals, based on 1961-90 data.