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| Point Forecast: Riderwood MD 39.4N 76.62W (Elev. 404 ft) |
Last Update: 1:50 am EDT Sep 25, 2020 |
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| Date | 09/25 | 09/26 | ||||||||||||||||||||||
| Hour (EDT) | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 |
| Temperature (°F) | 60 | 59 | 58 | 58 | 58 | 61 | 65 | 70 | 72 | 73 | 74 | 75 | 75 | 73 | 72 | 69 | 67 | 66 | 64 | 64 | 63 | 62 | 62 | 63 |
| Dewpoint (°F) | 57 | 57 | 57 | 56 | 58 | 59 | 61 | 61 | 60 | 59 | 58 | 58 | 60 | 61 | 62 | 63 | 62 | 62 | 62 | 62 | 62 | 62 | 62 | 62 |
| Heat Index (°F) | 75 | 75 | ||||||||||||||||||||||
| Surface Wind (mph) | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 5 | 6 | 7 | 8 | 8 | 8 | 8 | 8 | 7 | 7 | 7 | 7 | 7 | 6 | 6 | 5 | 5 |
| Wind Dir | SW | SW | SW | SW | S | S | S | S | S | S | S | S | S | S | S | S | S | S | S | S | S | S | S | S |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 68 | 71 | 72 | 74 | 59 | 59 | 59 | 59 | 60 | 62 | 63 | 65 | 68 | 70 | 72 | 76 | 78 | 77 | 76 | 75 | 76 | 77 | 77 | 80 |
| Precipitation Potential (%) | 5 | 5 | 0 | 0 | 2 | 2 | 2 | 4 | 4 | 4 | 18 | 18 | 18 | 18 | 18 | 18 | 20 | 20 | 20 | 20 | 20 | 20 | 25 | 25 |
| Relative Humidity (%) | 90 | 93 | 96 | 93 | 100 | 93 | 87 | 73 | 66 | 62 | 57 | 55 | 60 | 66 | 71 | 81 | 84 | 87 | 93 | 93 | 97 | 100 | 100 | 97 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | SChc | SChc | SChc | SChc | SChc | SChc | SChc | SChc | SChc | SChc | SChc | SChc | Chc | Chc |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Date | 09/27 | |||||||||||||||||||||||
| Hour (EDT) | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 |
| Temperature (°F) | 62 | 62 | 62 | 62 | 64 | 66 | 67 | 68 | 69 | 70 | 71 | 72 | 72 | 72 | 71 | 69 | 68 | 67 | 66 | 66 | 66 | 65 | 65 | 65 |
| Dewpoint (°F) | 62 | 62 | 62 | 62 | 63 | 64 | 66 | 67 | 68 | 68 | 68 | 68 | 68 | 68 | 68 | 68 | 68 | 67 | 66 | 66 | 66 | 65 | 65 | 65 |
| Heat Index (°F) | ||||||||||||||||||||||||
| Surface Wind (mph) | 5 | 5 | 5 | 5 | 5 | 5 | 6 | 6 | 6 | 6 | 6 | 6 | 7 | 7 | 6 | 6 | 5 | 5 | 6 | 6 | 5 | 3 | 2 | 2 |
| Wind Dir | SE | SE | SE | SE | E | SE | SE | SE | SE | SE | SE | SE | SE | SE | SE | SE | SE | SE | S | S | S | S | S | S |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 85 | 87 | 88 | 90 | 91 | 92 | 93 | 93 | 91 | 86 | 84 | 82 | 79 | 77 | 75 | 70 | 67 | 68 | 70 | 71 | 68 | 61 | 58 | 59 |
| Precipitation Potential (%) | 25 | 25 | 25 | 25 | 32 | 32 | 32 | 32 | 32 | 32 | 21 | 21 | 21 | 21 | 21 | 21 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 |
| Relative Humidity (%) | 100 | 100 | 100 | 100 | 97 | 93 | 97 | 97 | 97 | 93 | 90 | 87 | 87 | 87 | 90 | 97 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 |
| Rain | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | SChc | SChc | SChc | SChc | SChc | SChc | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
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