| Point Forecast: Washington DC 38.91N 77.05W (Elev. 89 ft) |
Last Update: 5:27 am EDT Aug 15, 2026 |
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| Date | 08/15 | 08/16 | ||||||||||||||||||||||
| 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) | 73 | 73 | 74 | 76 | 80 | 83 | 86 | 87 | 87 | 89 | 87 | 87 | 85 | 83 | 81 | 79 | 78 | 77 | 77 | 76 | 75 | 75 | 74 | 74 |
| Dewpoint (°F) | 66 | 67 | 69 | 70 | 71 | 71 | 70 | 70 | 70 | 70 | 70 | 70 | 70 | 69 | 68 | 69 | 69 | 69 | 69 | 70 | 70 | 71 | 71 | 71 |
| Heat Index (°F) | 76 | 83 | 88 | 91 | 92 | 92 | 94 | 92 | 92 | 90 | 87 | 84 | 79 | 78 | 77 | 77 | 76 | 75 | 75 | |||||
| Surface Wind (mph) | 6 | 6 | 5 | 5 | 5 | 5 | 5 | 3 | 3 | 3 | 5 | 5 | 5 | 3 | 3 | 3 | 2 | 3 | 3 | 3 | 3 | 3 | 3 | 5 |
| Wind Dir | N | N | NE | NE | NE | E | E | E | E | SE | SE | SE | SE | SE | SE | SE | SE | SE | SE | SE | SE | SE | SE | S |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 38 | 27 | 17 | 23 | 22 | 20 | 21 | 35 | 50 | 61 | 62 | 77 | 72 | 50 | 36 | 42 | 52 | 61 | 49 | 40 | 67 | 72 | 80 | 80 |
| Precipitation Potential (%) | 1 | 1 | 0 | 0 | 0 | 1 | 2 | 4 | 8 | 8 | 8 | 9 | 7 | 8 | 6 | 7 | 7 | 9 | 9 | 10 | 19 | 22 | 19 | 31 |
| Relative Humidity (%) | 79 | 81 | 84 | 82 | 74 | 67 | 59 | 57 | 57 | 54 | 57 | 57 | 61 | 63 | 65 | 72 | 74 | 76 | 76 | 82 | 84 | 87 | 90 | 90 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | SChc | SChc | SChc | Chc |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | SChc |
| Date | 08/17 | |||||||||||||||||||||||
| 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) | 74 | 73 | 74 | 76 | 78 | 79 | 81 | 82 | 83 | 84 | 85 | 82 | 80 | 80 | 78 | 77 | 77 | 77 | 77 | 76 | 75 | 75 | 74 | 74 |
| Dewpoint (°F) | 71 | 71 | 70 | 70 | 71 | 71 | 71 | 71 | 71 | 72 | 72 | 72 | 73 | 73 | 74 | 74 | 74 | 73 | 73 | 74 | 74 | 74 | 73 | 73 |
| Heat Index (°F) | 76 | 78 | 79 | 85 | 86 | 88 | 90 | 91 | 87 | 84 | 84 | 78 | 77 | 77 | 77 | 77 | 76 | 75 | 75 | |||||
| Surface Wind (mph) | 5 | 5 | 6 | 7 | 8 | 9 | 10 | 10 | 10 | 10 | 10 | 9 | 9 | 9 | 8 | 7 | 6 | 6 | 6 | 5 | 5 | 5 | 6 | 6 |
| Wind Dir | S | S | S | S | S | S | S | S | S | S | S | S | S | S | S | S | SW | SW | SW | W | W | W | W | W |
| Gust | 18 | 20 | 20 | 20 | 20 | 18 | ||||||||||||||||||
| Sky Cover (%) | 68 | 78 | 76 | 80 | 86 | 93 | 88 | 86 | 92 | 93 | 96 | 96 | 93 | 90 | 83 | 88 | 86 | 83 | 83 | 83 | 59 | 55 | 51 | 47 |
| Precipitation Potential (%) | 35 | 33 | 17 | 29 | 59 | 74 | 72 | 49 | 87 | 64 | 33 | 57 | 58 | 29 | 74 | 74 | 74 | 74 | 74 | 74 | 16 | 16 | 16 | 16 |
| Relative Humidity (%) | 90 | 93 | 87 | 82 | 79 | 77 | 72 | 69 | 67 | 67 | 65 | 72 | 79 | 79 | 88 | 90 | 90 | 87 | 87 | 94 | 97 | 97 | 97 | 97 |
| Rain | Chc | Chc | SChc | Chc | Lkly | Lkly | Lkly | Chc | Ocnl | Lkly | Chc | Lkly | Lkly | Chc | Lkly | Lkly | Lkly | Lkly | Lkly | Lkly | SChc | SChc | SChc | SChc |
| Thunder | SChc | SChc | -- | -- | -- | SChc | SChc | SChc | Chc | Chc | Chc | Lkly | Lkly | Chc | Chc | Chc | Chc | SChc | SChc | SChc | -- | -- | -- | -- |
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