| Point Forecast: Frederick MD 39.44N 77.39W (Elev. 289 ft) |
Last Update: 7:31 pm EDT Jul 16, 2025 |
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| Date | 07/16 | 07/17 | ||||||||||||||||||||||
| Hour (EDT) | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 |
| Temperature (°F) | 82 | 81 | 79 | 78 | 77 | 77 | 76 | 76 | 76 | 75 | 74 | 74 | 75 | 77 | 82 | 86 | 89 | 93 | 94 | 95 | 96 | 95 | 95 | 94 |
| Dewpoint (°F) | 75 | 75 | 76 | 76 | 75 | 75 | 75 | 74 | 74 | 74 | 74 | 73 | 73 | 75 | 75 | 75 | 75 | 74 | 73 | 73 | 73 | 73 | 73 | 73 |
| Heat Index (°F) | 89 | 87 | 79 | 78 | 77 | 77 | 76 | 76 | 76 | 75 | 75 | 77 | 89 | 95 | 99 | 103 | 103 | 105 | 106 | 105 | 105 | 103 | ||
| Surface Wind (mph) | 3 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 5 | 6 | 6 | 6 | 8 | 10 | 10 | 10 | 11 | 11 | 11 | 10 |
| Wind Dir | S | W | S | SW | S | S | S | S | S | S | SW | SW | SW | SW | SW | SW | W | W | W | W | W | W | W | W |
| Gust | 18 | 20 | 20 | 20 | 20 | 18 | ||||||||||||||||||
| Sky Cover (%) | 91 | 89 | 89 | 79 | 86 | 86 | 86 | 87 | 79 | 70 | 61 | 50 | 39 | 20 | 23 | 21 | 14 | 31 | 32 | 43 | 58 | 43 | 50 | 41 |
| Precipitation Potential (%) | 65 | 60 | 59 | 46 | 45 | 43 | 52 | 34 | 22 | 19 | 7 | 4 | 4 | 2 | 1 | 1 | 1 | 3 | 6 | 7 | 8 | 22 | 13 | 8 |
| Relative Humidity (%) | 79 | 82 | 91 | 94 | 94 | 94 | 97 | 94 | 94 | 97 | 100 | 97 | 94 | 94 | 79 | 70 | 64 | 54 | 51 | 49 | 48 | 49 | 49 | 51 |
| Rain | Lkly | Lkly | Lkly | Chc | Chc | Chc | Chc | Chc | SChc | SChc | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | SChc | -- | -- |
| Thunder | Lkly | Chc | Chc | Chc | Chc | Chc | Chc | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | SChc | -- | -- |
| Date | 07/18 | |||||||||||||||||||||||
| Hour (EDT) | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 |
| Temperature (°F) | 91 | 87 | 85 | 81 | 80 | 78 | 78 | 76 | 75 | 74 | 74 | 75 | 76 | 77 | 79 | 81 | 83 | 84 | 85 | 86 | 86 | 86 | 85 | 84 |
| Dewpoint (°F) | 73 | 74 | 75 | 75 | 74 | 74 | 73 | 73 | 72 | 72 | 71 | 71 | 71 | 71 | 71 | 71 | 71 | 71 | 72 | 72 | 72 | 72 | 72 | 72 |
| Heat Index (°F) | 100 | 95 | 94 | 87 | 84 | 78 | 78 | 76 | 75 | 75 | 76 | 77 | 79 | 85 | 88 | 89 | 91 | 92 | 92 | 92 | 91 | 90 | ||
| Surface Wind (mph) | 8 | 5 | 3 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 3 | 3 | 3 | 5 | 5 | 5 | 5 | 5 | 5 | 3 | 3 | 3 |
| Wind Dir | SW | SW | SW | W | W | W | W | W | W | NW | NW | NW | NW | N | N | NW | NW | NW | NW | NW | NW | NW | NW | NW |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 35 | 46 | 55 | 55 | 54 | 52 | 51 | 49 | 49 | 49 | 49 | 49 | 49 | 49 | 48 | 48 | 47 | 49 | 50 | 52 | 54 | 56 | 58 | 58 |
| Precipitation Potential (%) | 17 | 11 | 11 | 11 | 11 | 11 | 11 | 10 | 10 | 10 | 10 | 10 | 10 | 8 | 8 | 8 | 8 | 8 | 8 | 28 | 28 | 28 | 28 | 28 |
| Relative Humidity (%) | 56 | 65 | 72 | 82 | 82 | 88 | 85 | 90 | 90 | 93 | 90 | 87 | 85 | 82 | 77 | 72 | 67 | 65 | 65 | 63 | 63 | 63 | 65 | 67 |
| Rain | SChc | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | Chc | Chc | Chc | Chc | Chc |
| Thunder | SChc | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | Chc | Chc | Chc | Chc | Chc |
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