| Point Forecast: Harpers Ferry WV 39.32N 77.73W (Elev. 91 m) |
Last Update: 10:31 pm EDT Jul 16, 2025 |
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| Date | 07/17 | |||||||||||||||||||||||
| Hour (EDT) | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 |
| Temperature (°C) | 24 | 24 | 24 | 24 | 23 | 23 | 23 | 23 | 26 | 28 | 29 | 31 | 32 | 34 | 34 | 34 | 34 | 34 | 32 | 32 | 30 | 28 | 28 | 27 |
| Dewpoint (°C) | 23 | 23 | 23 | 23 | 22 | 22 | 22 | 22 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 |
| Heat Index (°C) | 24 | 24 | 24 | 24 | 26 | 31 | 34 | 36 | 36 | 39 | 39 | 39 | 38 | 38 | 36 | 36 | 33 | 31 | 31 | 29 | ||||
| Surface Wind (mph) | 8 | 8 | 7 | 7 | 7 | 8 | 8 | 9 | 8 | 8 | 8 | 10 | 11 | 11 | 13 | 13 | 11 | 13 | 13 | 11 | 10 | 9 | 8 | 8 |
| Wind Dir | S | S | SW | S | SW | SW | SW | SW | SW | SW | W | W | W | W | W | W | W | W | W | W | W | W | W | W |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 85 | 84 | 85 | 76 | 63 | 50 | 43 | 36 | 20 | 29 | 22 | 19 | 36 | 34 | 37 | 40 | 40 | 42 | 44 | 52 | 60 | 67 | 63 | 59 |
| Precipitation Potential (%) | 41 | 49 | 27 | 14 | 5 | 6 | 4 | 3 | 2 | 1 | 1 | 2 | 2 | 4 | 6 | 9 | 21 | 11 | 9 | 17 | 10 | 10 | 10 | 10 |
| Relative Humidity (%) | 90 | 94 | 94 | 90 | 93 | 93 | 93 | 93 | 88 | 74 | 70 | 63 | 59 | 52 | 51 | 49 | 51 | 49 | 56 | 57 | 63 | 70 | 72 | 77 |
| Rain | Chc | Chc | Chc | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | SChc | -- | -- | SChc | -- | -- | -- | -- |
| Thunder | SChc | SChc | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | SChc | -- | -- | SChc | -- | -- | -- | -- |
| Date | 07/18 | |||||||||||||||||||||||
| Hour (EDT) | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 |
| Temperature (°C) | 26 | 25 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 26 | 27 | 27 | 28 | 28 | 28 | 28 | 28 | 27 | 27 | 26 | 26 | 24 | 24 |
| Dewpoint (°C) | 22 | 22 | 22 | 22 | 21 | 21 | 21 | 22 | 22 | 22 | 21 | 21 | 21 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 21 | 21 |
| Heat Index (°C) | 26 | 25 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 26 | 28 | 29 | 30 | 31 | 31 | 31 | 30 | 29 | 28 | 26 | 26 | 24 | 24 |
| Surface Wind (mph) | 8 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 5 | 5 | 5 | 5 | 5 |
| Wind Dir | W | W | W | W | NW | NW | NW | NW | NW | NW | N | N | N | NW | NW | NW | NW | NW | NW | N | N | N | N | N |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 56 | 54 | 51 | 54 | 57 | 60 | 56 | 53 | 49 | 47 | 44 | 42 | 48 | 53 | 59 | 62 | 64 | 67 | 66 | 65 | 64 | 61 | 59 | 56 |
| Precipitation Potential (%) | 10 | 10 | 11 | 11 | 11 | 11 | 11 | 11 | 12 | 12 | 12 | 12 | 12 | 12 | 35 | 35 | 35 | 35 | 35 | 35 | 20 | 20 | 20 | 20 |
| Relative Humidity (%) | 82 | 82 | 85 | 85 | 82 | 84 | 84 | 87 | 87 | 85 | 76 | 72 | 69 | 69 | 67 | 67 | 67 | 69 | 72 | 74 | 77 | 79 | 82 | 84 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | Chc | Chc | Chc | Chc | Chc | Chc | SChc | SChc | SChc | SChc |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | Chc | Chc | Chc | Chc | Chc | Chc | SChc | SChc | SChc | -- |
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