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| Point Forecast: Washington DC 38.89N 77.02W (Elev. 20 ft) |
Last Update: 1:31 am EDT Aug 1, 2021 |
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| Date | 08/01 | 08/02 | ||||||||||||||||||||||
| Hour (EDT) | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 |
| Temperature (°F) | 72 | 72 | 72 | 71 | 71 | 71 | 70 | 71 | 71 | 71 | 73 | 73 | 75 | 76 | 78 | 79 | 78 | 77 | 77 | 75 | 74 | 72 | 71 | 70 |
| Dewpoint (°F) | 63 | 63 | 65 | 68 | 69 | 69 | 69 | 69 | 70 | 70 | 70 | 70 | 70 | 70 | 70 | 69 | 69 | 70 | 70 | 69 | 69 | 69 | 68 | 67 |
| Heat Index (°F) | 75 | 76 | 78 | 79 | 78 | 77 | 77 | 75 | ||||||||||||||||
| Surface Wind (mph) | 6 | 5 | 5 | 6 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 6 | 5 | 5 | 5 | 5 | 5 | 5 | 3 | 5 | 5 | 6 |
| Wind Dir | S | S | S | S | S | S | S | SE | SE | SE | SE | SE | SE | SE | S | SE | S | S | S | S | SW | W | W | W |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 85 | 87 | 90 | 93 | 93 | 95 | 95 | 94 | 93 | 98 | 93 | 93 | 77 | 68 | 75 | 83 | 75 | 75 | 62 | 48 | 41 | 34 | 27 | 18 |
| Precipitation Potential (%) | 27 | 35 | 52 | 64 | 62 | 61 | 60 | 67 | 70 | 66 | 55 | 45 | 40 | 34 | 25 | 17 | 23 | 22 | 22 | 22 | 22 | 22 | 9 | 9 |
| Relative Humidity (%) | 73 | 73 | 79 | 90 | 93 | 93 | 97 | 93 | 97 | 97 | 90 | 90 | 84 | 82 | 76 | 72 | 74 | 79 | 79 | 82 | 84 | 90 | 90 | 90 |
| Rain | Chc | Chc | Chc | Lkly | Lkly | Lkly | Lkly | Lkly | Lkly | Lkly | Lkly | Chc | Chc | Chc | Chc | SChc | SChc | SChc | SChc | SChc | SChc | SChc | -- | -- |
| Thunder | -- | SChc | SChc | SChc | SChc | SChc | SChc | SChc | SChc | SChc | SChc | SChc | SChc | SChc | Chc | SChc | SChc | SChc | SChc | SChc | SChc | SChc | -- | -- |
| Date | 08/03 | |||||||||||||||||||||||
| Hour (EDT) | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 |
| Temperature (°F) | 69 | 68 | 67 | 67 | 66 | 65 | 65 | 67 | 70 | 72 | 75 | 77 | 79 | 80 | 81 | 81 | 81 | 80 | 78 | 76 | 74 | 72 | 70 | 69 |
| Dewpoint (°F) | 65 | 64 | 64 | 63 | 61 | 61 | 61 | 61 | 61 | 60 | 60 | 60 | 59 | 59 | 58 | 57 | 57 | 57 | 57 | 58 | 59 | 59 | 60 | 60 |
| Heat Index (°F) | 75 | 77 | 79 | 81 | 81 | 81 | 81 | 80 | 78 | 76 | ||||||||||||||
| Surface Wind (mph) | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 8 | 8 | 8 | 8 | 8 | 7 | 7 | 6 | 6 | 6 | 6 | 5 | 5 | 3 | 3 | 2 | 2 |
| Wind Dir | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | N | N | NE | NE | NE | NE | NE | NE |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 10 | 1 | 3 | 3 | 3 | 3 | 3 | 3 | 4 | 5 | 5 | 7 | 13 | 14 | 16 | 20 | 22 | 25 | 32 | 35 | 35 | 35 | 35 | 37 |
| Precipitation Potential (%) | 9 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 3 | 3 | 3 | 3 | 3 | 3 | 4 | 4 | 4 | 4 | 4 |
| Relative Humidity (%) | 87 | 87 | 90 | 87 | 84 | 87 | 87 | 81 | 73 | 66 | 60 | 56 | 50 | 49 | 46 | 44 | 44 | 45 | 48 | 54 | 59 | 64 | 71 | 73 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
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