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| Point Forecast: Gaithersburg MD 39.13N 77.21W (Elev. 404 ft) |
Last Update: 10:33 pm EDT Jul 24, 2021 |
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| Date | 07/25 | |||||||||||||||||||||||
| Hour (EDT) | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 |
| Temperature (°F) | 74 | 73 | 73 | 72 | 72 | 71 | 71 | 71 | 73 | 77 | 80 | 83 | 86 | 89 | 90 | 90 | 89 | 88 | 87 | 86 | 83 | 81 | 79 | 78 |
| Dewpoint (°F) | 66 | 66 | 66 | 66 | 66 | 66 | 67 | 67 | 68 | 70 | 70 | 71 | 70 | 70 | 70 | 70 | 71 | 71 | 72 | 71 | 71 | 72 | 73 | 73 |
| Heat Index (°F) | 77 | 83 | 88 | 91 | 94 | 96 | 96 | 95 | 94 | 94 | 91 | 88 | 85 | 79 | 78 | |||||||||
| Surface Wind (mph) | 9 | 9 | 8 | 8 | 8 | 8 | 7 | 7 | 7 | 7 | 7 | 8 | 7 | 7 | 8 | 8 | 8 | 7 | 7 | 5 | 5 | 2 | 2 | 2 |
| Wind Dir | S | S | S | S | S | S | S | S | SW | SW | SW | SW | SW | SW | W | W | W | W | W | SW | SW | SW | SW | SW |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 50 | 59 | 64 | 64 | 72 | 73 | 66 | 52 | 64 | 59 | 49 | 53 | 54 | 54 | 57 | 62 | 65 | 59 | 52 | 57 | 67 | 57 | 56 | 54 |
| Precipitation Potential (%) | 19 | 19 | 11 | 11 | 11 | 9 | 9 | 9 | 1 | 1 | 2 | 3 | 5 | 9 | 21 | 30 | 36 | 34 | 30 | 27 | 20 | 19 | 20 | 16 |
| Relative Humidity (%) | 76 | 79 | 79 | 81 | 81 | 84 | 87 | 87 | 84 | 79 | 72 | 67 | 59 | 54 | 52 | 52 | 56 | 57 | 61 | 61 | 67 | 74 | 82 | 85 |
| Rain | Chc | Chc | SChc | SChc | SChc | SChc | SChc | SChc | -- | -- | -- | -- | -- | -- | SChc | Chc | Chc | Chc | Chc | Chc | SChc | SChc | SChc | SChc |
| Thunder | SChc | SChc | SChc | SChc | SChc | -- | -- | -- | -- | -- | -- | -- | -- | -- | SChc | Chc | Chc | Chc | Chc | Chc | SChc | SChc | SChc | SChc |
| Date | 07/26 | |||||||||||||||||||||||
| Hour (EDT) | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 |
| Temperature (°F) | 77 | 76 | 76 | 75 | 74 | 74 | 74 | 74 | 75 | 77 | 80 | 83 | 85 | 87 | 88 | 88 | 87 | 86 | 85 | 84 | 83 | 81 | 78 | 76 |
| Dewpoint (°F) | 73 | 73 | 73 | 74 | 73 | 72 | 72 | 73 | 73 | 73 | 73 | 72 | 71 | 69 | 68 | 67 | 67 | 67 | 67 | 68 | 68 | 68 | 68 | 68 |
| Heat Index (°F) | 77 | 76 | 76 | 75 | 75 | 77 | 84 | 88 | 90 | 91 | 92 | 91 | 90 | 89 | 88 | 87 | 86 | 84 | 78 | 76 | ||||
| Surface Wind (mph) | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 3 | 5 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 5 | 5 | 3 | 3 | 2 | 2 |
| Wind Dir | SW | SW | W | W | W | NW | NW | NW | NW | N | N | N | N | N | N | N | N | N | N | NE | NE | E | S | SW |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 49 | 59 | 58 | 43 | 42 | 51 | 54 | 60 | 65 | 64 | 59 | 54 | 53 | 54 | 53 | 47 | 38 | 31 | 27 | 25 | 24 | 21 | 17 | 13 |
| Precipitation Potential (%) | 16 | 16 | 12 | 12 | 12 | 12 | 12 | 12 | 23 | 23 | 23 | 23 | 23 | 23 | 36 | 36 | 36 | 36 | 36 | 36 | 13 | 13 | 13 | 13 |
| Relative Humidity (%) | 87 | 90 | 90 | 97 | 97 | 93 | 93 | 97 | 94 | 87 | 79 | 70 | 63 | 55 | 52 | 50 | 52 | 53 | 55 | 59 | 61 | 65 | 71 | 76 |
| Rain | SChc | SChc | -- | -- | -- | -- | -- | -- | SChc | SChc | SChc | SChc | SChc | SChc | Chc | Chc | Chc | Chc | Chc | Chc | -- | -- | -- | -- |
| Thunder | SChc | SChc | -- | -- | -- | -- | -- | -- | -- | -- | -- | SChc | SChc | SChc | Chc | Chc | Chc | Chc | Chc | Chc | -- | -- | -- | -- |
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