| Point Forecast: Largo MD 38.87N 76.86W (Elev. 54 m) |
Last Update: 2:22 pm EDT Jul 18, 2026 |
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| Date | 07/18 | 07/19 | ||||||||||||||||||||||
| Hour (EDT) | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 |
| Temperature (°C) | 35 | 34 | 33 | 32 | 32 | 30 | 29 | 28 | 27 | 26 | 26 | 26 | 26 | 26 | 25 | 25 | 24 | 24 | 25 | 26 | 27 | 28 | 28 | 29 |
| Dewpoint (°C) | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 24 | 24 | 23 | 23 | 23 | 23 | 23 | 22 | 22 | 22 | 22 | 22 | 22 | 21 | 21 | 20 |
| Heat Index (°C) | 41 | 39 | 38 | 37 | 36 | 34 | 33 | 31 | 29 | 26 | 26 | 26 | 26 | 26 | 25 | 25 | 24 | 24 | 25 | 26 | 29 | 30 | 31 | 31 |
| Surface Wind (mph) | 13 | 13 | 11 | 11 | 10 | 9 | 8 | 7 | 7 | 7 | 7 | 7 | 7 | 6 | 6 | 7 | 7 | 7 | 8 | 8 | 8 | 8 | 9 | 9 |
| Wind Dir | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | W | W | W | W | W | NW | NW | N | N | NW | NW |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 76 | 80 | 86 | 86 | 78 | 79 | 82 | 67 | 65 | 64 | 56 | 64 | 68 | 69 | 58 | 56 | 71 | 69 | 49 | 34 | 23 | 54 | 19 | 16 |
| Precipitation Potential (%) | 51 | 66 | 71 | 64 | 59 | 45 | 37 | 31 | 24 | 13 | 12 | 8 | 5 | 5 | 3 | 3 | 6 | 4 | 2 | 2 | 1 | 1 | 1 | 1 |
| Relative Humidity (%) | 49 | 51 | 56 | 60 | 59 | 65 | 72 | 77 | 85 | 88 | 88 | 88 | 85 | 85 | 87 | 85 | 87 | 90 | 85 | 82 | 72 | 67 | 63 | 59 |
| Rain | Chc | Lkly | Lkly | Lkly | Lkly | Chc | Chc | Chc | SChc | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | Chc | Lkly | Lkly | Lkly | Lkly | Chc | Chc | Chc | SChc | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Date | 07/20 | |||||||||||||||||||||||
| Hour (EDT) | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 |
| Temperature (°C) | 29 | 30 | 31 | 29 | 29 | 29 | 27 | 26 | 24 | 23 | 23 | 22 | 22 | 21 | 21 | 21 | 20 | 21 | 22 | 23 | 24 | 26 | 27 | 28 |
| Dewpoint (°C) | 20 | 19 | 19 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 18 | 18 | 18 | 17 | 17 | 17 |
| Heat Index (°C) | 31 | 32 | 32 | 31 | 31 | 30 | 28 | 26 | 24 | 24 | 26 | 28 | 28 | |||||||||||
| Surface Wind (mph) | 9 | 8 | 8 | 7 | 7 | 6 | 5 | 3 | 3 | 3 | 2 | 2 | 2 | 3 | 3 | 5 | 5 | 5 | 5 | 5 | 5 | 6 | 6 | 6 |
| Wind Dir | NW | N | N | N | N | N | N | N | NE | NE | NE | NE | NE | NE | NE | NE | NE | NE | NE | E | E | E | E | E |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 9 | 10 | 15 | 12 | 4 | 11 | 14 | 13 | 3 | 30 | 29 | 17 | 4 | 15 | 0 | 1 | 11 | 21 | 21 | 27 | 30 | 33 | 33 | 34 |
| Precipitation Potential (%) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 2 | 2 | 2 | 2 | 2 | 2 |
| Relative Humidity (%) | 57 | 53 | 50 | 51 | 51 | 53 | 58 | 64 | 69 | 71 | 73 | 73 | 73 | 78 | 78 | 76 | 81 | 78 | 79 | 71 | 66 | 58 | 54 | 53 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
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