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| Point Forecast: Washington DC 38.89N 77.02W (Elev. 20 ft) |
Last Update: 10:32 am EDT Sep 27, 2021 |
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| Date | 09/27 | 09/28 | ||||||||||||||||||||||
| Hour (EDT) | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 |
| Temperature (°F) | 77 | 79 | 80 | 80 | 79 | 77 | 75 | 71 | 70 | 69 | 69 | 67 | 66 | 66 | 65 | 65 | 64 | 63 | 63 | 64 | 69 | 72 | 75 | 78 |
| Dewpoint (°F) | 53 | 53 | 54 | 54 | 54 | 55 | 55 | 56 | 56 | 57 | 57 | 57 | 57 | 57 | 57 | 57 | 57 | 57 | 57 | 58 | 60 | 61 | 62 | 63 |
| Heat Index (°F) | 77 | 79 | 80 | 80 | 79 | 77 | 75 | 75 | 78 | |||||||||||||||
| Surface Wind (mph) | 9 | 9 | 9 | 9 | 9 | 9 | 8 | 8 | 8 | 8 | 8 | 7 | 6 | 5 | 3 | 3 | 3 | 3 | 3 | 3 | 6 | 7 | 8 | 8 |
| Wind Dir | SW | SW | SW | SW | SW | SW | S | S | S | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 21 | 17 | 43 | 18 | 33 | 37 | 9 | 15 | 12 | 9 | 10 | 2 | 2 | 4 | 5 | 7 | 21 | 27 | 38 | 36 | 40 | 53 | 58 | 43 |
| Precipitation Potential (%) | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 6 | 6 | 6 | 6 | 6 | 6 | 24 | 24 | 24 | 24 | 24 |
| Relative Humidity (%) | 43 | 41 | 41 | 41 | 42 | 47 | 50 | 59 | 61 | 66 | 66 | 70 | 73 | 73 | 75 | 75 | 78 | 81 | 81 | 81 | 73 | 68 | 64 | 60 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | SChc | SChc | SChc | SChc | SChc |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | SChc | SChc |
| Date | 09/29 | |||||||||||||||||||||||
| Hour (EDT) | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 |
| Temperature (°F) | 79 | 82 | 81 | 81 | 80 | 78 | 76 | 73 | 71 | 69 | 67 | 66 | 65 | 64 | 63 | 61 | 60 | 59 | 58 | 58 | 60 | 63 | 66 | 68 |
| Dewpoint (°F) | 64 | 64 | 65 | 65 | 65 | 65 | 65 | 65 | 65 | 65 | 65 | 64 | 62 | 60 | 59 | 57 | 56 | 55 | 53 | 52 | 51 | 50 | 50 | 50 |
| Heat Index (°F) | 79 | 83 | 83 | 83 | 82 | 78 | 76 | |||||||||||||||||
| Surface Wind (mph) | 8 | 8 | 8 | 8 | 7 | 6 | 5 | 5 | 3 | 3 | 3 | 3 | 3 | 5 | 5 | 5 | 5 | 5 | 6 | 6 | 6 | 7 | 8 | 7 |
| Wind Dir | W | W | W | W | W | W | NW | NW | NW | NW | N | N | N | N | N | N | N | N | N | N | N | N | N | N |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 60 | 48 | 36 | 37 | 37 | 34 | 40 | 47 | 44 | 39 | 36 | 30 | 19 | 14 | 17 | 21 | 23 | 19 | 11 | 7 | 6 | 3 | 2 | 2 |
| Precipitation Potential (%) | 24 | 49 | 49 | 49 | 49 | 49 | 49 | 31 | 31 | 31 | 31 | 31 | 31 | 7 | 7 | 7 | 7 | 7 | 7 | 3 | 3 | 3 | 3 | 3 |
| Relative Humidity (%) | 60 | 55 | 58 | 58 | 60 | 64 | 69 | 76 | 81 | 87 | 93 | 93 | 90 | 87 | 87 | 87 | 87 | 87 | 83 | 80 | 72 | 62 | 56 | 52 |
| Rain | SChc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | SChc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
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