| Point Forecast: Martinsburg Arpt WV 39.41N 77.97W (Elev. 499 ft) |
Last Update: 2:16 pm EDT Sep 13, 2026 |
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| Date | 09/13 | 09/14 | ||||||||||||||||||||||
| Hour (EDT) | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 |
| Temperature (°F) | 86 | 86 | 85 | 85 | 84 | 81 | 78 | 75 | 73 | 72 | 71 | 71 | 71 | 70 | 69 | 68 | 67 | 66 | 66 | 67 | 70 | 71 | 73 | 75 |
| Dewpoint (°F) | 70 | 71 | 71 | 71 | 70 | 70 | 70 | 70 | 68 | 67 | 67 | 68 | 67 | 66 | 64 | 63 | 61 | 60 | 60 | 60 | 58 | 56 | 55 | 54 |
| Heat Index (°F) | 91 | 91 | 90 | 90 | 88 | 85 | 78 | 75 | 75 | |||||||||||||||
| Surface Wind (mph) | 9 | 8 | 6 | 6 | 5 | 3 | 3 | 3 | 3 | 5 | 5 | 5 | 5 | 6 | 8 | 9 | 10 | 10 | 10 | 11 | 11 | 13 | 11 | 11 |
| Wind Dir | N | NW | NW | NW | NW | NW | W | W | W | W | W | W | W | NW | NW | NW | N | N | N | N | N | N | N | N |
| Gust | 25 | 18 | 22 | 22 | 22 | 22 | 22 | 22 | ||||||||||||||||
| Sky Cover (%) | 38 | 43 | 33 | 33 | 25 | 18 | 18 | 22 | 24 | 41 | 45 | 42 | 40 | 53 | 49 | 54 | 58 | 35 | 19 | 11 | 15 | 19 | 19 | 14 |
| Precipitation Potential (%) | 17 | 16 | 16 | 18 | 5 | 5 | 1 | 1 | 1 | 5 | 3 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
| Relative Humidity (%) | 59 | 61 | 63 | 63 | 63 | 69 | 76 | 84 | 84 | 84 | 87 | 90 | 87 | 87 | 84 | 84 | 81 | 81 | 81 | 78 | 66 | 59 | 53 | 48 |
| Rain | SChc | SChc | SChc | SChc | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | SChc | SChc | SChc | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Date | 09/15 | |||||||||||||||||||||||
| Hour (EDT) | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 |
| Temperature (°F) | 76 | 76 | 75 | 75 | 72 | 68 | 64 | 61 | 58 | 57 | 56 | 55 | 54 | 53 | 51 | 51 | 51 | 50 | 52 | 56 | 62 | 67 | 71 | 74 |
| Dewpoint (°F) | 52 | 51 | 50 | 51 | 51 | 51 | 50 | 50 | 50 | 50 | 50 | 49 | 49 | 48 | 48 | 48 | 48 | 47 | 48 | 48 | 48 | 49 | 50 | 50 |
| Heat Index (°F) | 76 | 76 | 75 | 75 | ||||||||||||||||||||
| Surface Wind (mph) | 11 | 11 | 11 | 10 | 9 | 7 | 5 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 5 | 6 | 7 |
| Wind Dir | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | E | SE | SE | SE | S |
| Gust | 20 | 20 | 18 | |||||||||||||||||||||
| Sky Cover (%) | 11 | 9 | 6 | 7 | 6 | 7 | 4 | 7 | 1 | 7 | 13 | 5 | 4 | 14 | 8 | 12 | 12 | 16 | 11 | 14 | 18 | 21 | 18 | 14 |
| Precipitation Potential (%) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Relative Humidity (%) | 43 | 42 | 41 | 43 | 48 | 54 | 60 | 67 | 75 | 77 | 80 | 80 | 83 | 83 | 89 | 89 | 89 | 89 | 86 | 74 | 60 | 52 | 47 | 43 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
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