| Point Forecast: Riderwood MD 39.4N 76.62W (Elev. 404 ft) |
Last Update: 1:31 pm EDT Jul 15, 2025 |
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| Date | 07/15 | 07/16 | ||||||||||||||||||||||
| 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 (°F) | 86 | 89 | 89 | 89 | 89 | 86 | 84 | 79 | 78 | 77 | 76 | 76 | 75 | 75 | 74 | 74 | 73 | 74 | 77 | 80 | 82 | 84 | 85 | 85 |
| Dewpoint (°F) | 74 | 75 | 76 | 75 | 75 | 75 | 75 | 75 | 74 | 75 | 74 | 74 | 74 | 73 | 74 | 73 | 73 | 74 | 75 | 76 | 76 | 76 | 76 | 77 |
| Heat Index (°F) | 94 | 99 | 100 | 99 | 99 | 95 | 92 | 79 | 78 | 77 | 76 | 76 | 75 | 75 | 77 | 86 | 89 | 93 | 94 | 96 | ||||
| Surface Wind (mph) | 2 | 2 | 3 | 3 | 3 | 3 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 5 | 6 | 6 | 6 |
| Wind Dir | SE | SE | SE | S | SE | S | S | S | S | S | S | S | S | S | S | S | S | S | S | S | S | S | S | S |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 48 | 50 | 65 | 59 | 52 | 51 | 45 | 31 | 29 | 41 | 45 | 49 | 42 | 42 | 52 | 44 | 46 | 45 | 60 | 65 | 68 | 48 | 62 | 77 |
| Precipitation Potential (%) | 9 | 16 | 22 | 19 | 16 | 13 | 5 | 6 | 8 | 4 | 4 | 6 | 8 | 7 | 7 | 5 | 4 | 4 | 5 | 5 | 9 | 18 | 31 | 38 |
| Relative Humidity (%) | 68 | 64 | 66 | 64 | 64 | 70 | 74 | 88 | 88 | 94 | 94 | 94 | 97 | 94 | 100 | 97 | 100 | 100 | 94 | 88 | 82 | 77 | 75 | 77 |
| Rain | -- | SChc | SChc | SChc | SChc | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | SChc | Chc | Chc |
| Thunder | -- | SChc | SChc | SChc | SChc | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | SChc | Chc | Chc |
| Date | 07/17 | |||||||||||||||||||||||
| 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 (°F) | 85 | 86 | 86 | 84 | 83 | 81 | 80 | 79 | 78 | 77 | 76 | 76 | 76 | 76 | 76 | 76 | 76 | 77 | 78 | 80 | 83 | 86 | 88 | 89 |
| Dewpoint (°F) | 77 | 76 | 77 | 76 | 76 | 75 | 75 | 75 | 75 | 75 | 75 | 74 | 74 | 74 | 73 | 73 | 74 | 74 | 75 | 75 | 74 | 74 | 74 | 74 |
| Heat Index (°F) | 96 | 96 | 97 | 93 | 91 | 87 | 85 | 79 | 78 | 77 | 76 | 76 | 76 | 76 | 76 | 76 | 76 | 77 | 78 | 85 | 90 | 94 | 97 | 98 |
| Surface Wind (mph) | 7 | 7 | 7 | 7 | 7 | 6 | 6 | 5 | 3 | 3 | 3 | 5 | 5 | 5 | 6 | 6 | 6 | 6 | 6 | 7 | 7 | 8 | 8 | 8 |
| Wind Dir | S | S | SW | S | S | SW | S | S | S | SW | SW | S | S | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | W |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 74 | 80 | 80 | 88 | 82 | 84 | 84 | 67 | 72 | 76 | 73 | 69 | 66 | 64 | 62 | 60 | 56 | 52 | 48 | 43 | 39 | 34 | 42 | 51 |
| Precipitation Potential (%) | 55 | 69 | 70 | 66 | 73 | 61 | 31 | 31 | 31 | 31 | 31 | 31 | 11 | 11 | 11 | 11 | 11 | 11 | 16 | 16 | 16 | 16 | 16 | 16 |
| Relative Humidity (%) | 77 | 72 | 75 | 77 | 80 | 82 | 85 | 88 | 91 | 94 | 97 | 94 | 94 | 94 | 90 | 90 | 94 | 90 | 91 | 85 | 74 | 68 | 63 | 61 |
| Rain | Lkly | Lkly | Lkly | Lkly | Lkly | Lkly | Chc | Chc | Chc | Chc | Chc | Chc | -- | -- | -- | -- | -- | -- | SChc | SChc | SChc | SChc | SChc | SChc |
| Thunder | Lkly | Lkly | Lkly | Lkly | Lkly | Lkly | Chc | Chc | Chc | Chc | Chc | Chc | -- | -- | -- | -- | -- | -- | -- | -- | -- | SChc | SChc | SChc |
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