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| Point Forecast: Washington DC, Reagan National Airport VA 38.84N 77.03W (Elev. 3 ft) |
Last Update: 4:32 am EDT Aug 4, 2021 |
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| Date | 08/04 | 08/05 | ||||||||||||||||||||||
| Hour (EDT) | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 |
| Temperature (°F) | 68 | 68 | 69 | 71 | 74 | 75 | 77 | 78 | 79 | 80 | 80 | 79 | 78 | 77 | 75 | 73 | 72 | 71 | 70 | 69 | 68 | 67 | 67 | 67 |
| Dewpoint (°F) | 61 | 62 | 63 | 62 | 62 | 60 | 60 | 59 | 59 | 59 | 58 | 59 | 59 | 59 | 59 | 60 | 59 | 60 | 59 | 59 | 60 | 59 | 60 | 60 |
| Heat Index (°F) | 75 | 77 | 78 | 79 | 81 | 81 | 79 | 78 | 77 | 75 | ||||||||||||||
| Surface Wind (mph) | 5 | 3 | 6 | 7 | 8 | 10 | 13 | 13 | 13 | 13 | 11 | 11 | 10 | 9 | 8 | 6 | 6 | 6 | 6 | 5 | 5 | 5 | 3 | 3 |
| Wind Dir | NE | NE | NE | NE | NE | NE | NE | NE | NE | NE | NE | NE | NE | E | E | E | NE | NE | N | N | N | N | N | N |
| Gust | 20 | 20 | 20 | 20 | 20 | 20 | ||||||||||||||||||
| Sky Cover (%) | 81 | 77 | 83 | 82 | 78 | 85 | 76 | 69 | 56 | 47 | 44 | 43 | 49 | 32 | 28 | 25 | 25 | 31 | 20 | 18 | 17 | 14 | 17 | 22 |
| Precipitation Potential (%) | 2 | 2 | 13 | 13 | 13 | 13 | 13 | 13 | 7 | 7 | 7 | 7 | 7 | 7 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 |
| Relative Humidity (%) | 78 | 81 | 81 | 73 | 66 | 60 | 56 | 52 | 50 | 49 | 47 | 50 | 52 | 54 | 58 | 64 | 64 | 68 | 68 | 70 | 76 | 75 | 78 | 78 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Fog | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Date | 08/06 | |||||||||||||||||||||||
| Hour (EDT) | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 |
| Temperature (°F) | 66 | 66 | 69 | 72 | 75 | 78 | 80 | 82 | 83 | 84 | 85 | 85 | 84 | 82 | 80 | 78 | 77 | 75 | 74 | 73 | 72 | 71 | 70 | 70 |
| Dewpoint (°F) | 59 | 60 | 60 | 60 | 60 | 60 | 60 | 59 | 59 | 59 | 59 | 59 | 59 | 60 | 60 | 60 | 61 | 61 | 61 | 61 | 61 | 61 | 62 | 62 |
| Heat Index (°F) | 75 | 78 | 81 | 82 | 83 | 84 | 85 | 85 | 84 | 82 | 81 | 78 | 77 | 75 | ||||||||||
| Surface Wind (mph) | 3 | 3 | 3 | 3 | 5 | 6 | 6 | 5 | 5 | 5 | 6 | 6 | 6 | 6 | 6 | 6 | 5 | 3 | 3 | 3 | 3 | 3 | 3 | 3 |
| Wind Dir | NW | NW | N | N | N | NW | NW | NW | NW | W | S | S | S | S | S | S | S | S | S | SW | SW | SW | SW | SW |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 21 | 13 | 10 | 16 | 18 | 14 | 15 | 16 | 16 | 16 | 16 | 16 | 13 | 11 | 8 | 10 | 11 | 13 | 9 | 5 | 2 | 2 | 3 | 4 |
| Precipitation Potential (%) | 5 | 5 | 10 | 10 | 10 | 10 | 10 | 10 | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 |
| Relative Humidity (%) | 78 | 81 | 73 | 66 | 60 | 54 | 51 | 46 | 44 | 43 | 41 | 41 | 43 | 47 | 51 | 54 | 58 | 62 | 64 | 66 | 68 | 71 | 76 | 76 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Fog | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
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