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| Point Forecast: 2 Miles S Washington-Dulles International Airport VA 38.93N 77.45W (Elev. 299 ft) |
Last Update: 4:30 pm EDT Sep 24, 2021 |
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| Date | 09/24 | 09/25 | ||||||||||||||||||||||
| Hour (EDT) | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 |
| Temperature (°F) | 72 | 69 | 66 | 63 | 61 | 60 | 57 | 57 | 56 | 54 | 53 | 53 | 52 | 52 | 51 | 52 | 58 | 63 | 67 | 70 | 72 | 74 | 74 | 73 |
| Dewpoint (°F) | 49 | 51 | 52 | 53 | 53 | 54 | 53 | 52 | 52 | 52 | 51 | 50 | 49 | 49 | 49 | 50 | 52 | 53 | 54 | 54 | 54 | 54 | 54 | 54 |
| Heat Index (°F) | ||||||||||||||||||||||||
| Surface Wind (mph) | 6 | 5 | 3 | 1 | 1 | 1 | 1 | 1 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | 3 | 3 | 3 |
| Wind Dir | NW | NW | N | E | E | SE | S | W | W | NW | NW | NW | NW | NW | NW | NW | NW | NW | W | W | SW | W | W | W |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 6 | 5 | 4 | 4 | 1 | 1 | 3 | 2 | 2 | 5 | 10 | 21 | 22 | 24 | 20 | 21 | 32 | 28 | 43 | 44 | 55 | 49 | 73 | 61 |
| 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 (%) | 44 | 53 | 61 | 70 | 75 | 81 | 86 | 83 | 86 | 93 | 93 | 89 | 89 | 89 | 93 | 93 | 80 | 70 | 63 | 57 | 53 | 50 | 50 | 51 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Date | 09/26 | |||||||||||||||||||||||
| Hour (EDT) | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 |
| Temperature (°F) | 72 | 70 | 67 | 65 | 63 | 62 | 61 | 60 | 59 | 58 | 57 | 56 | 56 | 55 | 55 | 56 | 59 | 63 | 67 | 69 | 70 | 71 | 72 | 72 |
| Dewpoint (°F) | 55 | 55 | 55 | 55 | 55 | 55 | 55 | 55 | 54 | 54 | 54 | 53 | 53 | 53 | 53 | 53 | 53 | 52 | 52 | 51 | 51 | 50 | 50 | 49 |
| Heat Index (°F) | ||||||||||||||||||||||||
| Surface Wind (mph) | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | 3 | 3 | 3 | 3 | 5 | 6 | 8 | 9 | 9 | 9 | 9 | 9 | 9 |
| Wind Dir | W | SW | SW | S | SW | SW | W | W | W | W | W | NW | NW | NW | NW | NW | NW | NW | NW | NW | W | W | W | W |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 61 | 38 | 34 | 29 | 24 | 14 | 12 | 11 | 10 | 10 | 9 | 5 | 4 | 3 | 0 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 3 | 6 |
| Precipitation Potential (%) | 2 | 2 | 2 | 6 | 6 | 6 | 6 | 6 | 6 | 3 | 3 | 3 | 3 | 3 | 3 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 |
| Relative Humidity (%) | 55 | 59 | 65 | 70 | 75 | 78 | 81 | 84 | 83 | 86 | 90 | 90 | 90 | 93 | 93 | 90 | 80 | 67 | 59 | 53 | 51 | 47 | 46 | 44 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
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