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| Point Forecast: Langley Park MD 39N 76.98W (Elev. 38 m) |
Last Update: 1:32 pm EDT May 17, 2022 |
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| Date | 05/17 | 05/18 | ||||||||||||||||||||||
| 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) | 26 | 26 | 27 | 26 | 26 | 24 | 23 | 21 | 19 | 18 | 17 | 16 | 14 | 13 | 13 | 12 | 12 | 12 | 14 | 16 | 17 | 19 | 21 | 22 |
| Dewpoint (°C) | 7 | 7 | 7 | 6 | 8 | 8 | 9 | 9 | 9 | 8 | 8 | 7 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 7 | 7 |
| Heat Index (°C) | 26 | 26 | 26 | 26 | 26 | 24 | ||||||||||||||||||
| Surface Wind (mph) | 16 | 16 | 14 | 13 | 13 | 10 | 7 | 6 | 6 | 6 | 7 | 7 | 6 | 6 | 5 | 5 | 3 | 3 | 5 | 5 | 3 | 3 | 3 | 3 |
| Wind Dir | W | W | W | W | NW | NW | NW | NW | NW | NW | NW | N | NW | NW | N | NW | NW | NW | N | N | NW | NW | NW | W |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 57 | 52 | 47 | 41 | 58 | 53 | 8 | 6 | 2 | 6 | 5 | 5 | 11 | 7 | 5 | 18 | 15 | 6 | 11 | 15 | 12 | 24 | 19 | 24 |
| Precipitation Potential (%) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Relative Humidity (%) | 30 | 29 | 28 | 28 | 32 | 36 | 43 | 49 | 50 | 54 | 56 | 58 | 57 | 62 | 61 | 64 | 66 | 66 | 57 | 51 | 46 | 42 | 40 | 38 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Date | 05/19 | |||||||||||||||||||||||
| 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) | 23 | 23 | 24 | 24 | 23 | 22 | 21 | 20 | 18 | 17 | 17 | 16 | 16 | 16 | 16 | 16 | 16 | 17 | 18 | 20 | 22 | 23 | 24 | 26 |
| Dewpoint (°C) | 7 | 7 | 8 | 8 | 9 | 9 | 9 | 10 | 11 | 11 | 12 | 12 | 12 | 12 | 12 | 13 | 13 | 14 | 15 | 16 | 16 | 17 | 17 | 17 |
| Heat Index (°C) | 24 | 24 | 24 | 26 | ||||||||||||||||||||
| Surface Wind (mph) | 3 | 3 | 3 | 3 | 5 | 6 | 6 | 6 | 7 | 7 | 7 | 8 | 8 | 7 | 7 | 6 | 6 | 7 | 7 | 7 | 8 | 8 | 9 | 10 |
| Wind Dir | W | W | SW | S | S | S | SE | SE | SE | SE | SE | SE | SE | S | S | S | S | S | SW | SW | SW | W | W | W |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 25 | 28 | 22 | 46 | 46 | 40 | 46 | 50 | 65 | 86 | 86 | 86 | 86 | 87 | 88 | 89 | 87 | 84 | 82 | 76 | 71 | 65 | 61 | 58 |
| Precipitation Potential (%) | 4 | 4 | 4 | 15 | 15 | 15 | 62 | 62 | 62 | 62 | 62 | 62 | 54 | 54 | 54 | 54 | 54 | 54 | 19 | 19 | 19 | 19 | 19 | 19 |
| Relative Humidity (%) | 37 | 35 | 36 | 37 | 40 | 42 | 47 | 52 | 60 | 67 | 72 | 75 | 78 | 81 | 81 | 84 | 84 | 84 | 81 | 76 | 71 | 66 | 62 | 58 |
| Rain | -- | -- | -- | SChc | SChc | SChc | Lkly | Lkly | Lkly | Lkly | Lkly | Lkly | Chc | Chc | Chc | Chc | Chc | Chc | SChc | SChc | SChc | SChc | SChc | SChc |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
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