| Point Forecast: 2 Miles S Washington-Dulles International Airport VA 38.93N 77.45W (Elev. 299 ft) |
Last Update: 1:31 pm EDT Jul 15, 2025 |
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| Date | 07/15 | 07/16 | ||||||||||||||||||||||
| Hour (EDT) | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 |
| Temperature (°F) | 77 | 77 | 76 | 75 | 75 | 75 | 74 | 73 | 74 | 77 | 80 | 82 | 84 | 86 | 88 | 88 | 88 | 87 | 85 | 83 | 81 | 80 | 79 | 78 |
| Dewpoint (°F) | 76 | 76 | 75 | 75 | 75 | 74 | 74 | 73 | 74 | 76 | 76 | 77 | 77 | 78 | 78 | 78 | 78 | 77 | 77 | 76 | 76 | 76 | 76 | 76 |
| Heat Index (°F) | 77 | 77 | 76 | 75 | 75 | 75 | 77 | 86 | 90 | 94 | 98 | 102 | 102 | 102 | 99 | 96 | 91 | 87 | 86 | 79 | 78 | |||
| Surface Wind (mph) | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 3 | 3 | 5 | 5 | 6 | 6 | 7 | 8 | 9 | 9 | 9 | 9 | 8 | 8 | 7 | 6 | 6 |
| Wind Dir | S | S | S | S | S | S | S | S | S | S | S | S | S | S | S | S | S | SW | SW | SW | S | S | S | S |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 48 | 41 | 57 | 54 | 57 | 56 | 55 | 64 | 58 | 66 | 56 | 65 | 71 | 58 | 55 | 65 | 71 | 80 | 86 | 81 | 73 | 72 | 66 | 67 |
| Precipitation Potential (%) | 7 | 7 | 5 | 5 | 4 | 5 | 5 | 6 | 5 | 4 | 6 | 10 | 9 | 16 | 27 | 36 | 49 | 66 | 70 | 62 | 59 | 21 | 21 | 21 |
| Relative Humidity (%) | 97 | 97 | 97 | 100 | 100 | 97 | 100 | 100 | 100 | 97 | 88 | 85 | 80 | 77 | 72 | 72 | 72 | 72 | 77 | 80 | 85 | 88 | 91 | 94 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | SChc | Chc | Chc | Chc | Lkly | Lkly | Lkly | Lkly | SChc | SChc | SChc |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | SChc | SChc | Chc | Chc | Lkly | Lkly | Lkly | Lkly | SChc | SChc | SChc |
| Date | 07/17 | |||||||||||||||||||||||
| Hour (EDT) | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 |
| Temperature (°F) | 78 | 78 | 77 | 77 | 77 | 76 | 76 | 76 | 77 | 78 | 81 | 85 | 88 | 90 | 92 | 93 | 93 | 92 | 91 | 90 | 88 | 86 | 84 | 83 |
| Dewpoint (°F) | 76 | 76 | 75 | 75 | 75 | 74 | 74 | 75 | 75 | 76 | 76 | 75 | 75 | 75 | 75 | 75 | 74 | 74 | 74 | 74 | 74 | 75 | 76 | 76 |
| Heat Index (°F) | 78 | 78 | 77 | 77 | 77 | 76 | 76 | 76 | 77 | 78 | 87 | 94 | 98 | 101 | 103 | 105 | 103 | 102 | 101 | 99 | 97 | 95 | 93 | 91 |
| Surface Wind (mph) | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 7 | 7 | 8 | 8 | 8 | 8 | 8 | 9 | 9 | 8 | 7 | 6 | 6 | 5 |
| Wind Dir | S | S | S | S | S | SW | SW | SW | SW | SW | SW | SW | SW | SW | W | W | W | SW | SW | SW | SW | SW | SW | SW |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 68 | 67 | 67 | 66 | 65 | 65 | 64 | 57 | 50 | 43 | 41 | 38 | 36 | 43 | 50 | 57 | 57 | 57 | 57 | 57 | 57 | 38 | 37 | 37 |
| Precipitation Potential (%) | 21 | 21 | 21 | 4 | 4 | 4 | 4 | 4 | 4 | 9 | 9 | 9 | 9 | 9 | 9 | 36 | 36 | 36 | 36 | 36 | 36 | 9 | 9 | 9 |
| Relative Humidity (%) | 94 | 94 | 94 | 94 | 94 | 94 | 94 | 97 | 94 | 94 | 85 | 72 | 66 | 62 | 58 | 56 | 54 | 56 | 58 | 60 | 63 | 70 | 77 | 80 |
| Rain | SChc | SChc | SChc | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | Chc | Chc | Chc | Chc | Chc | Chc | -- | -- | -- |
| Thunder | SChc | SChc | SChc | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | Chc | Chc | Chc | Chc | Chc | Chc | -- | -- | -- |
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