| Point Forecast: Ashton-Sandy Spring MD 39.15N 77.01W (Elev. 137 m) |
Last Update: 12:01 am EDT Jun 6, 2026 |
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| Date | 06/06 | 06/07 | ||||||||||||||||||||||
| Hour (EDT) | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 |
| Temperature (°C) | 22 | 20 | 20 | 19 | 19 | 19 | 20 | 22 | 24 | 28 | 29 | 31 | 32 | 32 | 32 | 33 | 32 | 32 | 31 | 29 | 27 | 25 | 24 | 23 |
| Dewpoint (°C) | 13 | 13 | 13 | 13 | 13 | 14 | 14 | 16 | 17 | 16 | 16 | 15 | 14 | 14 | 14 | 14 | 15 | 16 | 16 | 17 | 17 | 18 | 18 | 18 |
| Heat Index (°C) | 24 | 28 | 29 | 30 | 31 | 32 | 32 | 32 | 32 | 32 | 31 | 29 | 27 | 25 | 24 | |||||||||
| Surface Wind (mph) | 1 | 1 | 1 | 1 | 2 | 2 | 3 | 3 | 3 | 6 | 7 | 8 | 9 | 9 | 9 | 9 | 9 | 9 | 8 | 6 | 6 | 5 | 5 | 5 |
| Wind Dir | SW | SW | W | W | W | W | W | W | W | W | W | W | W | W | W | W | W | W | SW | SW | W | W | W | NW |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 24 | 30 | 37 | 22 | 25 | 30 | 29 | 41 | 23 | 49 | 72 | 76 | 75 | 68 | 57 | 46 | 31 | 28 | 32 | 56 | 60 | 74 | 82 | 60 |
| Precipitation Potential (%) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 2 | 3 | 4 | 5 | 20 | 18 | 18 | 9 | 7 |
| Relative Humidity (%) | 59 | 65 | 65 | 68 | 70 | 73 | 70 | 68 | 62 | 49 | 43 | 39 | 35 | 34 | 34 | 33 | 35 | 37 | 40 | 49 | 56 | 64 | 69 | 71 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | SChc | SChc | SChc | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | SChc | SChc | SChc | -- | -- |
| Date | 06/08 | |||||||||||||||||||||||
| Hour (EDT) | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 |
| Temperature (°C) | 23 | 22 | 21 | 21 | 21 | 20 | 21 | 22 | 24 | 27 | 28 | 29 | 29 | 30 | 31 | 31 | 31 | 32 | 31 | 29 | 26 | 24 | 23 | 22 |
| Dewpoint (°C) | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 19 | 19 | 19 | 18 | 18 | 18 | 17 | 16 | 16 | 15 | 15 | 14 | 15 | 14 | 14 | 14 | 14 |
| Heat Index (°C) | 24 | 28 | 29 | 30 | 30 | 31 | 31 | 31 | 31 | 31 | 30 | 29 | 26 | 24 | ||||||||||
| Surface Wind (mph) | 5 | 5 | 5 | 5 | 5 | 5 | 6 | 6 | 7 | 7 | 8 | 8 | 9 | 9 | 9 | 9 | 9 | 9 | 7 | 5 | 5 | 3 | 3 | 3 |
| Wind Dir | W | W | W | W | W | W | W | W | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | N | N | N |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 48 | 58 | 37 | 31 | 26 | 15 | 20 | 13 | 12 | 6 | 9 | 10 | 26 | 33 | 33 | 23 | 20 | 28 | 19 | 23 | 0 | 5 | 9 | 9 |
| Precipitation Potential (%) | 7 | 6 | 5 | 4 | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Relative Humidity (%) | 76 | 81 | 81 | 81 | 84 | 87 | 84 | 84 | 76 | 62 | 56 | 53 | 50 | 46 | 40 | 39 | 38 | 37 | 38 | 43 | 49 | 54 | 57 | 61 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
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