| Point Forecast: Frederick MD 39.44N 77.42W (Elev. 348 ft) |
Last Update: 4:53 pm EDT Aug 8, 2026 |
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| Date | 08/08 | 08/09 | ||||||||||||||||||||||
| Hour (EDT) | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 |
| Temperature (°F) | 88 | 87 | 83 | 80 | 79 | 77 | 76 | 75 | 75 | 75 | 74 | 74 | 74 | 73 | 75 | 78 | 82 | 84 | 86 | 88 | 89 | 90 | 90 | 90 |
| Dewpoint (°F) | 71 | 72 | 72 | 72 | 71 | 71 | 70 | 70 | 70 | 70 | 69 | 69 | 69 | 70 | 71 | 71 | 71 | 72 | 72 | 71 | 70 | 69 | 68 | 68 |
| Heat Index (°F) | 94 | 94 | 88 | 84 | 79 | 77 | 76 | 75 | 75 | 75 | 75 | 78 | 86 | 90 | 92 | 94 | 94 | 95 | 94 | 94 | ||||
| Surface Wind (mph) | 6 | 5 | 2 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 2 | 3 | 5 | 5 | 5 | 5 | 6 | 5 | 5 | 5 |
| Wind Dir | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | W | W | W | W | W | W | W | W | W | W |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 38 | 60 | 39 | 23 | 21 | 22 | 25 | 37 | 33 | 51 | 50 | 54 | 42 | 62 | 39 | 34 | 18 | 14 | 8 | 19 | 10 | 14 | 16 | 6 |
| Precipitation Potential (%) | 18 | 11 | 2 | 3 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 2 | 2 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 2 | 1 | 2 |
| Relative Humidity (%) | 57 | 61 | 70 | 77 | 77 | 82 | 82 | 84 | 84 | 84 | 84 | 84 | 84 | 90 | 87 | 79 | 69 | 67 | 63 | 57 | 54 | 50 | 49 | 49 |
| Rain | SChc | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | SChc | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Date | 08/10 | |||||||||||||||||||||||
| Hour (EDT) | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 |
| Temperature (°F) | 90 | 88 | 85 | 81 | 78 | 76 | 75 | 74 | 73 | 72 | 72 | 72 | 70 | 72 | 74 | 78 | 82 | 86 | 89 | 91 | 92 | 92 | 92 | 90 |
| Dewpoint (°F) | 67 | 68 | 68 | 68 | 68 | 67 | 67 | 66 | 66 | 66 | 65 | 65 | 65 | 66 | 67 | 68 | 70 | 71 | 72 | 72 | 72 | 72 | 71 | 71 |
| Heat Index (°F) | 93 | 92 | 88 | 84 | 78 | 76 | 75 | 78 | 86 | 91 | 96 | 99 | 100 | 100 | 99 | 96 | ||||||||
| Surface Wind (mph) | 3 | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 3 | 5 | 6 | 7 | 7 | 7 | 7 |
| Wind Dir | W | W | SW | N | N | N | N | N | N | N | N | N | N | N | N | W | W | W | W | W | SW | SW | W | W |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 15 | 14 | 4 | 10 | 6 | 7 | 7 | 7 | 7 | 8 | 17 | 11 | 6 | 0 | 5 | 7 | 13 | 19 | 30 | 42 | 53 | 53 | 53 | 53 |
| Precipitation Potential (%) | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 6 | 6 | 6 | 6 | 6 | 6 | 30 | 30 | 30 | 30 |
| Relative Humidity (%) | 47 | 52 | 57 | 65 | 71 | 74 | 76 | 76 | 79 | 81 | 79 | 79 | 84 | 81 | 79 | 71 | 67 | 61 | 57 | 54 | 52 | 52 | 51 | 54 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | Chc | Chc | Chc | Chc |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | SChc | SChc | SChc | Chc |
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