| Point Forecast: Mc Lean VA 38.95N 77.19W (Elev. 253 ft) |
Last Update: 2:23 am EDT Aug 14, 2026 |
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| Date | 08/14 | 08/15 | ||||||||||||||||||||||
| Hour (EDT) | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 |
| Temperature (°F) | 77 | 76 | 74 | 75 | 74 | 74 | 75 | 77 | 81 | 82 | 83 | 83 | 84 | 84 | 85 | 82 | 81 | 80 | 77 | 76 | 75 | 75 | 74 | 74 |
| Dewpoint (°F) | 67 | 67 | 67 | 67 | 66 | 66 | 68 | 68 | 69 | 69 | 70 | 71 | 71 | 72 | 72 | 72 | 72 | 70 | 70 | 70 | 70 | 70 | 70 | 70 |
| Heat Index (°F) | 77 | 76 | 75 | 75 | 77 | 84 | 85 | 87 | 88 | 89 | 90 | 91 | 87 | 85 | 83 | 77 | 76 | 75 | 75 | |||||
| Surface Wind (mph) | 1 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 3 | 3 | 3 | 5 | 5 | 5 | 3 | 3 | 2 | 2 | 1 | 1 | 1 | 1 |
| Wind Dir | NE | N | N | N | N | N | N | NE | E | E | N | N | N | N | NE | NE | N | N | N | NW | NW | NW | NW | N |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 77 | 76 | 70 | 72 | 72 | 80 | 68 | 68 | 77 | 75 | 86 | 82 | 88 | 78 | 85 | 87 | 72 | 69 | 51 | 44 | 56 | 41 | 58 | 54 |
| Precipitation Potential (%) | 19 | 27 | 20 | 21 | 15 | 18 | 16 | 25 | 28 | 27 | 31 | 26 | 37 | 39 | 35 | 46 | 48 | 40 | 26 | 20 | 16 | 5 | 3 | 3 |
| Relative Humidity (%) | 71 | 74 | 79 | 76 | 76 | 76 | 79 | 74 | 67 | 65 | 65 | 67 | 65 | 67 | 65 | 72 | 74 | 72 | 79 | 82 | 84 | 84 | 87 | 87 |
| Rain | SChc | Chc | SChc | SChc | SChc | SChc | SChc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | SChc | SChc | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | SChc | SChc | SChc | Chc | Chc | Chc | SChc | SChc | SChc | -- | -- | -- |
| Date | 08/16 | |||||||||||||||||||||||
| Hour (EDT) | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 |
| Temperature (°F) | 73 | 73 | 72 | 72 | 72 | 71 | 73 | 74 | 78 | 81 | 83 | 85 | 86 | 86 | 87 | 85 | 85 | 83 | 80 | 78 | 77 | 76 | 75 | 74 |
| Dewpoint (°F) | 69 | 69 | 69 | 68 | 68 | 68 | 69 | 70 | 70 | 70 | 70 | 70 | 70 | 70 | 70 | 69 | 69 | 68 | 68 | 69 | 69 | 69 | 69 | 69 |
| Heat Index (°F) | 78 | 85 | 87 | 90 | 91 | 91 | 92 | 89 | 89 | 86 | 83 | 78 | 77 | 76 | 75 | |||||||||
| Surface Wind (mph) | 1 | 1 | 2 | 3 | 2 | 3 | 3 | 3 | 3 | 5 | 3 | 5 | 5 | 5 | 5 | 5 | 5 | 3 | 3 | 3 | 3 | 3 | 3 | 3 |
| Wind Dir | N | N | N | N | N | N | NE | E | NE | E | E | E | E | E | E | E | E | E | SE | SE | SE | SE | SE | S |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 41 | 62 | 53 | 63 | 67 | 60 | 50 | 42 | 42 | 39 | 39 | 35 | 30 | 18 | 34 | 43 | 52 | 42 | 56 | 34 | 46 | 57 | 57 | 56 |
| Precipitation Potential (%) | 3 | 3 | 3 | 2 | 9 | 9 | 8 | 9 | 0 | 0 | 9 | 0 | 2 | 1 | 1 | 7 | 9 | 5 | 7 | 7 | 7 | 7 | 7 | 7 |
| Relative Humidity (%) | 87 | 87 | 90 | 87 | 87 | 90 | 87 | 87 | 76 | 69 | 65 | 61 | 59 | 59 | 57 | 59 | 59 | 61 | 67 | 74 | 76 | 79 | 82 | 84 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
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