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| Point Forecast: Washington DC, Reagan National Airport VA 38.84N 77.03W (Elev. 3 ft) |
Last Update: 1:31 am EDT Jul 24, 2021 |
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| Date | 07/24 | 07/25 | ||||||||||||||||||||||
| Hour (EDT) | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 |
| Temperature (°F) | 70 | 70 | 71 | 72 | 74 | 77 | 79 | 81 | 83 | 84 | 85 | 86 | 86 | 86 | 85 | 83 | 81 | 79 | 78 | 77 | 76 | 76 | 75 | 74 |
| Dewpoint (°F) | 58 | 59 | 59 | 59 | 60 | 61 | 61 | 61 | 62 | 62 | 62 | 63 | 63 | 63 | 62 | 63 | 62 | 63 | 64 | 64 | 63 | 64 | 63 | 63 |
| Heat Index (°F) | 77 | 79 | 82 | 84 | 85 | 86 | 87 | 87 | 87 | 86 | 84 | 82 | 79 | 78 | 77 | 76 | 76 | 75 | ||||||
| Surface Wind (mph) | 2 | 2 | 2 | 2 | 2 | 3 | 6 | 6 | 6 | 7 | 8 | 9 | 9 | 9 | 10 | 10 | 9 | 9 | 9 | 9 | 9 | 10 | 10 | 10 |
| Wind Dir | S | S | S | SE | S | S | S | S | S | S | S | S | S | S | S | S | S | S | S | S | S | S | S | S |
| Gust | 18 | 20 | 20 | 21 | 21 | 22 | 21 | |||||||||||||||||
| Sky Cover (%) | 29 | 31 | 33 | 33 | 33 | 33 | 35 | 37 | 39 | 45 | 50 | 45 | 32 | 25 | 29 | 15 | 42 | 48 | 47 | 56 | 56 | 55 | 64 | 64 |
| Precipitation Potential (%) | 2 | 1 | 1 | 1 | 3 | 3 | 3 | 3 | 3 | 3 | 8 | 8 | 8 | 11 | 11 | 11 | 14 | 14 | 14 | 14 | 14 | 14 | 19 | 19 |
| Relative Humidity (%) | 66 | 68 | 66 | 64 | 62 | 58 | 54 | 51 | 49 | 48 | 46 | 46 | 46 | 46 | 46 | 51 | 53 | 58 | 62 | 64 | 64 | 66 | 66 | 69 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | SChc | SChc |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Fog | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Date | 07/26 | |||||||||||||||||||||||
| Hour (EDT) | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 |
| Temperature (°F) | 73 | 73 | 73 | 74 | 75 | 78 | 81 | 84 | 87 | 90 | 92 | 92 | 92 | 91 | 89 | 88 | 86 | 84 | 82 | 80 | 80 | 79 | 79 | 78 |
| Dewpoint (°F) | 64 | 63 | 64 | 64 | 65 | 66 | 67 | 68 | 68 | 68 | 68 | 68 | 69 | 69 | 69 | 68 | 68 | 68 | 69 | 70 | 70 | 70 | 70 | 70 |
| Heat Index (°F) | 75 | 78 | 83 | 87 | 91 | 94 | 96 | 96 | 97 | 96 | 94 | 92 | 89 | 87 | 85 | 83 | 83 | 79 | 79 | 78 | ||||
| Surface Wind (mph) | 10 | 9 | 9 | 9 | 10 | 10 | 10 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 8 | 7 | 6 | 6 | 6 | 6 | 6 | 5 | 5 | 5 |
| Wind Dir | S | S | S | S | S | S | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | W | W |
| Gust | 20 | 20 | 20 | 20 | 18 | |||||||||||||||||||
| Sky Cover (%) | 57 | 61 | 65 | 60 | 66 | 60 | 50 | 54 | 52 | 46 | 43 | 46 | 53 | 60 | 62 | 61 | 61 | 62 | 65 | 65 | 62 | 57 | 53 | 52 |
| Precipitation Potential (%) | 19 | 19 | 19 | 19 | 7 | 7 | 7 | 7 | 7 | 7 | 28 | 28 | 28 | 28 | 28 | 28 | 30 | 30 | 30 | 30 | 30 | 30 | 9 | 9 |
| Relative Humidity (%) | 73 | 71 | 73 | 71 | 71 | 67 | 63 | 59 | 53 | 49 | 46 | 46 | 47 | 49 | 52 | 52 | 55 | 59 | 65 | 72 | 72 | 74 | 74 | 76 |
| Rain | SChc | SChc | SChc | SChc | -- | -- | -- | -- | -- | -- | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | SChc | SChc | SChc | Chc | Chc | Chc | Chc | Chc | Chc | SChc | SChc | SChc | -- | -- |
| Fog | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
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