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| Point Forecast: Washington DC, Reagan National Airport VA 38.84N 77.03W (Elev. 3 ft) |
Last Update: 7:31 am EDT Sep 23, 2021 |
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| Date | 09/23 | 09/24 | ||||||||||||||||||||||
| Hour (EDT) | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 |
| Temperature (°F) | 69 | 69 | 67 | 66 | 67 | 68 | 68 | 69 | 70 | 69 | 68 | 67 | 66 | 64 | 63 | 63 | 62 | 61 | 60 | 60 | 59 | 58 | 57 | 57 |
| Dewpoint (°F) | 64 | 63 | 63 | 62 | 62 | 62 | 61 | 60 | 59 | 59 | 58 | 58 | 57 | 56 | 55 | 54 | 53 | 52 | 52 | 52 | 51 | 50 | 50 | 49 |
| Heat Index (°F) | ||||||||||||||||||||||||
| Surface Wind (mph) | 8 | 7 | 6 | 7 | 8 | 7 | 8 | 7 | 6 | 6 | 6 | 6 | 6 | 6 | 7 | 7 | 7 | 7 | 8 | 7 | 7 | 7 | 7 | 7 |
| Wind Dir | W | NW | NW | N | N | N | NW | NW | NW | NW | NW | NW | NW | NW | NW | N | N | N | N | NW | NW | NW | NW | NW |
| Gust | 18 | 21 | 22 | 22 | 18 | 20 | 20 | 18 | ||||||||||||||||
| Sky Cover (%) | 91 | 89 | 92 | 92 | 87 | 70 | 58 | 34 | 27 | 22 | 23 | 20 | 17 | 18 | 25 | 6 | 10 | 10 | 5 | 9 | 7 | 12 | 12 | 10 |
| Precipitation Potential (%) | 86 | 86 | 86 | 43 | 43 | 43 | 19 | 19 | 19 | 14 | 14 | 14 | 9 | 9 | 9 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 |
| Relative Humidity (%) | 84 | 81 | 87 | 87 | 84 | 81 | 78 | 73 | 68 | 70 | 70 | 73 | 73 | 75 | 75 | 72 | 72 | 72 | 75 | 75 | 75 | 75 | 77 | 75 |
| Rain | Ocnl | Ocnl | Ocnl | Chc | Chc | Chc | SChc | SChc | SChc | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | Chc | Chc | Chc | Chc | Chc | Chc | SChc | SChc | SChc | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Fog | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Date | 09/25 | |||||||||||||||||||||||
| Hour (EDT) | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 |
| Temperature (°F) | 58 | 60 | 63 | 66 | 68 | 69 | 70 | 71 | 71 | 71 | 70 | 68 | 66 | 65 | 64 | 63 | 62 | 61 | 60 | 59 | 58 | 58 | 58 | 58 |
| Dewpoint (°F) | 50 | 50 | 50 | 50 | 50 | 50 | 50 | 50 | 50 | 50 | 50 | 50 | 50 | 51 | 51 | 52 | 52 | 52 | 52 | 52 | 51 | 51 | 51 | 51 |
| Heat Index (°F) | ||||||||||||||||||||||||
| Surface Wind (mph) | 7 | 7 | 7 | 8 | 9 | 10 | 10 | 10 | 9 | 8 | 7 | 6 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 |
| Wind Dir | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | W | W | SW | SW | SW | W | NW | NW | NW | NW | NW | NW |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 6 | 1 | 3 | 4 | 4 | 3 | 4 | 4 | 4 | 3 | 3 | 3 | 6 | 5 | 5 | 5 | 5 | 5 | 7 | 10 | 14 | 16 | 16 | 17 |
| 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 (%) | 75 | 69 | 62 | 56 | 52 | 51 | 49 | 47 | 47 | 47 | 49 | 52 | 56 | 60 | 63 | 67 | 70 | 72 | 75 | 78 | 77 | 77 | 77 | 77 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Fog | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
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