| Point Forecast: Reston VA 38.95N 77.36W (Elev. 446 ft) |
Last Update: 1:30 am EDT Jul 15, 2025 |
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| Date | 07/15 | 07/16 | ||||||||||||||||||||||
| Hour (EDT) | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 |
| Temperature (°F) | 73 | 73 | 73 | 73 | 73 | 75 | 77 | 79 | 82 | 84 | 86 | 87 | 87 | 87 | 85 | 84 | 83 | 82 | 79 | 78 | 77 | 76 | 76 | 75 |
| Dewpoint (°F) | 73 | 72 | 72 | 72 | 73 | 74 | 74 | 74 | 75 | 75 | 75 | 74 | 75 | 74 | 75 | 75 | 75 | 75 | 75 | 75 | 75 | 74 | 75 | 74 |
| Heat Index (°F) | 75 | 77 | 79 | 89 | 92 | 95 | 95 | 96 | 95 | 94 | 92 | 90 | 89 | 79 | 78 | 77 | 76 | 76 | 75 | |||||
| Surface Wind (mph) | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 3 | 3 | 3 | 3 | 3 | 5 | 5 | 5 | 5 | 3 | 3 | 3 | 3 | 3 | 3 |
| Wind Dir | W | W | NW | N | N | N | N | N | N | N | NW | E | SE | SE | SE | S | S | S | S | S | S | S | S | S |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 56 | 56 | 62 | 73 | 57 | 50 | 59 | 47 | 44 | 34 | 32 | 51 | 57 | 67 | 69 | 59 | 59 | 49 | 39 | 48 | 48 | 49 | 57 | 51 |
| Precipitation Potential (%) | 13 | 11 | 11 | 10 | 9 | 6 | 2 | 4 | 4 | 8 | 16 | 27 | 35 | 50 | 54 | 39 | 38 | 17 | 17 | 18 | 16 | 4 | 4 | 3 |
| Relative Humidity (%) | 100 | 97 | 97 | 97 | 100 | 97 | 90 | 85 | 79 | 74 | 70 | 65 | 68 | 65 | 72 | 74 | 77 | 79 | 88 | 91 | 94 | 94 | 97 | 97 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | SChc | Chc | Chc | Chc | Chc | Chc | Chc | SChc | SChc | SChc | SChc | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | SChc | Chc | Chc | Chc | Chc | Chc | Chc | SChc | SChc | SChc | -- | -- | -- | -- |
| Date | 07/17 | |||||||||||||||||||||||
| Hour (EDT) | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 |
| Temperature (°F) | 75 | 74 | 74 | 73 | 74 | 76 | 79 | 82 | 84 | 86 | 87 | 88 | 88 | 87 | 86 | 85 | 83 | 81 | 79 | 78 | 77 | 77 | 77 | 77 |
| Dewpoint (°F) | 74 | 74 | 74 | 73 | 74 | 75 | 76 | 77 | 77 | 77 | 77 | 77 | 77 | 76 | 76 | 76 | 75 | 75 | 75 | 75 | 75 | 75 | 74 | 74 |
| Heat Index (°F) | 75 | 76 | 79 | 90 | 94 | 97 | 99 | 100 | 100 | 98 | 96 | 94 | 90 | 87 | 79 | 78 | 77 | 77 | 77 | 77 | ||||
| Surface Wind (mph) | 3 | 5 | 5 | 5 | 6 | 6 | 6 | 7 | 8 | 9 | 9 | 9 | 10 | 10 | 10 | 9 | 8 | 7 | 7 | 7 | 7 | 7 | 7 | 7 |
| Wind Dir | S | S | S | S | S | S | SW | SW | S | S | S | S | S | S | S | S | S | S | S | S | S | S | S | S |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 38 | 33 | 59 | 57 | 51 | 51 | 73 | 68 | 62 | 68 | 74 | 80 | 80 | 80 | 80 | 80 | 80 | 77 | 74 | 71 | 68 | 67 | 67 | 66 |
| Precipitation Potential (%) | 4 | 5 | 6 | 10 | 10 | 27 | 27 | 27 | 27 | 27 | 27 | 69 | 69 | 69 | 69 | 69 | 69 | 23 | 23 | 23 | 23 | 23 | 23 | 7 |
| Relative Humidity (%) | 97 | 100 | 100 | 100 | 100 | 97 | 91 | 85 | 80 | 75 | 72 | 70 | 70 | 70 | 72 | 75 | 77 | 82 | 88 | 91 | 94 | 94 | 90 | 90 |
| Rain | -- | -- | -- | -- | -- | Chc | Chc | Chc | Chc | Chc | Chc | Lkly | Lkly | Lkly | Lkly | Lkly | Lkly | SChc | SChc | SChc | SChc | SChc | SChc | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | Chc | Chc | Chc | Lkly | Lkly | Lkly | Lkly | Lkly | Lkly | SChc | SChc | SChc | SChc | SChc | SChc | -- |
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