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| Point Forecast: Gaithersburg MD 39.13N 77.21W (Elev. 404 ft) |
Last Update: 1:34 am EDT Jun 13, 2021 |
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| Date | 06/13 | 06/14 | ||||||||||||||||||||||
| Hour (EDT) | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 |
| Temperature (°F) | 66 | 65 | 64 | 64 | 64 | 65 | 67 | 70 | 72 | 74 | 77 | 79 | 81 | 81 | 81 | 81 | 80 | 78 | 76 | 74 | 72 | 71 | 70 | 69 |
| Dewpoint (°F) | 64 | 64 | 64 | 63 | 63 | 64 | 65 | 65 | 67 | 67 | 67 | 67 | 67 | 67 | 67 | 68 | 68 | 68 | 68 | 69 | 68 | 67 | 67 | 66 |
| Heat Index (°F) | 77 | 79 | 83 | 83 | 83 | 84 | 83 | 78 | 76 | |||||||||||||||
| Surface Wind (mph) | 2 | 2 | 3 | 3 | 3 | 3 | 3 | 6 | 6 | 6 | 6 | 7 | 7 | 7 | 7 | 7 | 6 | 6 | 6 | 5 | 5 | 5 | 5 | 5 |
| Wind Dir | SE | SE | SE | SE | SE | S | S | S | S | S | S | S | S | S | S | S | S | S | S | S | SE | SE | SE | SE |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 39 | 49 | 54 | 57 | 58 | 56 | 57 | 57 | 56 | 52 | 41 | 33 | 35 | 31 | 45 | 61 | 74 | 70 | 78 | 79 | 74 | 78 | 71 | 63 |
| Precipitation Potential (%) | 3 | 3 | 3 | 3 | 3 | 3 | 2 | 2 | 2 | 3 | 2 | 4 | 10 | 17 | 27 | 37 | 44 | 49 | 56 | 60 | 60 | 58 | 51 | 42 |
| Relative Humidity (%) | 93 | 97 | 100 | 97 | 97 | 97 | 93 | 84 | 84 | 79 | 71 | 67 | 63 | 63 | 63 | 65 | 67 | 71 | 76 | 84 | 87 | 87 | 90 | 90 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | SChc | Chc | Chc | Chc | Chc | Lkly | Lkly | Lkly | Lkly | Chc | Chc |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | SChc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc |
| Date | 06/15 | |||||||||||||||||||||||
| Hour (EDT) | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 |
| Temperature (°F) | 69 | 68 | 67 | 67 | 67 | 67 | 69 | 72 | 73 | 76 | 79 | 81 | 82 | 83 | 84 | 84 | 83 | 81 | 79 | 76 | 73 | 71 | 69 | 68 |
| Dewpoint (°F) | 65 | 66 | 66 | 66 | 65 | 66 | 67 | 68 | 68 | 68 | 67 | 66 | 65 | 64 | 64 | 65 | 66 | 67 | 67 | 67 | 66 | 65 | 65 | 64 |
| Heat Index (°F) | 76 | 79 | 83 | 84 | 84 | 85 | 86 | 85 | 83 | 79 | 76 | |||||||||||||
| Surface Wind (mph) | 5 | 3 | 3 | 3 | 2 | 3 | 3 | 6 | 5 | 6 | 7 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 5 | 1 | 2 | 5 | 5 | 3 |
| Wind Dir | S | S | S | S | S | S | SW | SW | SW | W | W | SW | SW | SW | S | S | S | S | S | S | NW | NW | NW | NW |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 63 | 61 | 64 | 65 | 66 | 63 | 63 | 61 | 60 | 57 | 48 | 35 | 24 | 20 | 21 | 26 | 31 | 37 | 44 | 51 | 57 | 58 | 56 | 50 |
| Precipitation Potential (%) | 22 | 22 | 22 | 22 | 22 | 22 | 13 | 13 | 13 | 13 | 13 | 13 | 30 | 30 | 30 | 30 | 30 | 30 | 44 | 44 | 44 | 44 | 44 | 44 |
| Relative Humidity (%) | 87 | 93 | 97 | 97 | 93 | 97 | 93 | 87 | 84 | 76 | 67 | 60 | 56 | 53 | 51 | 53 | 57 | 63 | 67 | 74 | 79 | 81 | 87 | 87 |
| Rain | SChc | SChc | SChc | SChc | SChc | SChc | -- | -- | -- | -- | -- | -- | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc |
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