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| Point Forecast: Martinsburg Arpt WV 39.41N 77.97W (Elev. 499 ft) |
Last Update: 1:32 pm EDT Sep 23, 2021 |
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| Date | 09/23 | 09/24 | ||||||||||||||||||||||
| Hour (EDT) | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 |
| Temperature (°F) | 71 | 69 | 66 | 62 | 60 | 57 | 56 | 55 | 53 | 53 | 51 | 50 | 50 | 49 | 48 | 48 | 50 | 55 | 59 | 62 | 64 | 67 | 68 | 69 |
| Dewpoint (°F) | 54 | 52 | 49 | 48 | 46 | 46 | 46 | 45 | 45 | 44 | 44 | 44 | 43 | 43 | 43 | 43 | 44 | 46 | 46 | 46 | 46 | 47 | 46 | 46 |
| Heat Index (°F) | ||||||||||||||||||||||||
| Surface Wind (mph) | 10 | 10 | 10 | 8 | 5 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 5 | 3 | 3 | 3 | 5 | 6 | 8 | 8 | 7 | 7 | 7 |
| Wind Dir | W | W | W | NW | NW | NW | W | W | W | W | W | W | SW | W | SW | SW | SW | W | W | W | W | W | W | W |
| Gust | 18 | |||||||||||||||||||||||
| Sky Cover (%) | 31 | 22 | 12 | 11 | 7 | 6 | 4 | 2 | 2 | 2 | 1 | 2 | 3 | 4 | 2 | 4 | 1 | 2 | 3 | 2 | 4 | 5 | 7 | 5 |
| Precipitation Potential (%) | 1 | 1 | 1 | 1 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Relative Humidity (%) | 55 | 55 | 54 | 60 | 60 | 67 | 69 | 69 | 74 | 71 | 77 | 80 | 77 | 80 | 83 | 83 | 80 | 72 | 62 | 56 | 52 | 49 | 45 | 44 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Fog | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Date | 09/25 | |||||||||||||||||||||||
| Hour (EDT) | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 |
| Temperature (°F) | 69 | 69 | 67 | 64 | 61 | 59 | 57 | 55 | 54 | 54 | 53 | 52 | 51 | 50 | 49 | 50 | 51 | 55 | 59 | 64 | 68 | 70 | 72 | 73 |
| Dewpoint (°F) | 46 | 46 | 46 | 47 | 47 | 47 | 48 | 48 | 48 | 47 | 46 | 45 | 45 | 45 | 45 | 46 | 47 | 48 | 49 | 50 | 50 | 50 | 50 | 50 |
| Heat Index (°F) | ||||||||||||||||||||||||
| Surface Wind (mph) | 7 | 7 | 5 | 3 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 1 | 1 | 1 | 2 | 2 | 2 | 3 | 3 | 5 | 5 | 6 | 6 |
| Wind Dir | W | W | W | W | W | W | W | W | W | W | W | W | W | W | W | W | W | W | SW | SW | SW | SW | S | S |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 3 | 3 | 4 | 3 | 1 | 1 | 2 | 3 | 2 | 2 | 3 | 7 | 14 | 21 | 28 | 32 | 34 | 32 | 29 | 27 | 28 | 31 | 33 | 32 |
| Precipitation Potential (%) | 0 | 0 | 0 | 0 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 |
| Relative Humidity (%) | 44 | 44 | 47 | 54 | 60 | 64 | 72 | 77 | 80 | 77 | 77 | 77 | 80 | 83 | 86 | 86 | 86 | 77 | 69 | 60 | 52 | 49 | 46 | 44 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Fog | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
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