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| Point Forecast: Washington DC 38.89N 77.02W (Elev. 6 m) |
Last Update: 4:31 pm EDT Aug 3, 2021 |
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| Date | 08/03 | 08/04 | ||||||||||||||||||||||
| Hour (EDT) | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 |
| Temperature (°C) | 26 | 25 | 23 | 23 | 21 | 21 | 20 | 20 | 20 | 19 | 19 | 19 | 18 | 19 | 20 | 22 | 23 | 24 | 24 | 26 | 26 | 27 | 27 | 27 |
| Dewpoint (°C) | 16 | 16 | 16 | 16 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 18 | 18 | 18 | 17 | 16 | 16 | 16 | 16 | 16 | 16 |
| Heat Index (°C) | 26 | 25 | 24 | 24 | 26 | 26 | 27 | 27 | 27 | |||||||||||||||
| Surface Wind (mph) | 6 | 6 | 5 | 5 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 5 | 5 | 6 | 7 | 8 | 9 | 10 | 10 | 11 | 11 | 10 | 10 |
| Wind Dir | E | E | E | E | E | E | E | E | NE | NE | NE | NE | NE | NE | NE | NE | NE | NE | NE | NE | NE | E | E | E |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 91 | 87 | 79 | 71 | 62 | 54 | 62 | 70 | 78 | 82 | 86 | 90 | 89 | 87 | 86 | 80 | 75 | 69 | 65 | 60 | 56 | 49 | 42 | 35 |
| Precipitation Potential (%) | 3 | 3 | 2 | 2 | 2 | 2 | 2 | 2 | 5 | 5 | 5 | 5 | 5 | 5 | 6 | 6 | 6 | 6 | 6 | 6 | 3 | 3 | 3 | 3 |
| Relative Humidity (%) | 52 | 58 | 64 | 66 | 76 | 76 | 84 | 84 | 84 | 87 | 90 | 90 | 93 | 90 | 87 | 79 | 73 | 64 | 60 | 56 | 52 | 51 | 51 | 51 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Date | 08/05 | |||||||||||||||||||||||
| Hour (EDT) | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 |
| Temperature (°C) | 26 | 25 | 24 | 23 | 22 | 21 | 20 | 19 | 19 | 19 | 18 | 18 | 18 | 19 | 20 | 22 | 24 | 26 | 27 | 28 | 28 | 29 | 29 | 29 |
| Dewpoint (°C) | 16 | 16 | 16 | 16 | 17 | 17 | 17 | 17 | 17 | 17 | 16 | 16 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 16 | 16 | 16 | 16 | 16 |
| Heat Index (°C) | 26 | 25 | 24 | 24 | 26 | 27 | 28 | 28 | 29 | 29 | 29 | |||||||||||||
| Surface Wind (mph) | 9 | 8 | 7 | 6 | 5 | 3 | 3 | 3 | 3 | 3 | 5 | 5 | 5 | 5 | 5 | 6 | 6 | 7 | 6 | 6 | 5 | 6 | 6 | 7 |
| Wind Dir | E | E | E | E | NE | NE | NE | N | N | N | N | N | N | N | N | N | N | NE | NE | NE | NE | E | E | SE |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 32 | 28 | 25 | 26 | 28 | 29 | 26 | 24 | 21 | 22 | 23 | 24 | 26 | 28 | 30 | 26 | 23 | 19 | 20 | 22 | 23 | 21 | 18 | 16 |
| Precipitation Potential (%) | 3 | 3 | 5 | 5 | 5 | 5 | 5 | 5 | 6 | 6 | 6 | 6 | 6 | 6 | 9 | 9 | 9 | 9 | 9 | 9 | 10 | 10 | 10 | 10 |
| Relative Humidity (%) | 52 | 58 | 62 | 66 | 73 | 78 | 81 | 84 | 84 | 87 | 87 | 87 | 90 | 87 | 84 | 76 | 64 | 58 | 54 | 49 | 47 | 46 | 44 | 44 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
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