| Point Forecast: Portland ME 43.66N 70.27W (Elev. 2 m) |
Last Update: 1:37 am EDT Jul 19, 2025 |
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| Date | 07/19 | 07/20 | ||||||||||||||||||||||
| Hour (EDT) | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 |
| Temperature (°C) | 14 | 16 | 17 | 19 | 19 | 21 | 22 | 22 | 22 | 22 | 22 | 23 | 22 | 22 | 21 | 20 | 20 | 20 | 20 | 20 | 19 | 20 | 19 | 19 |
| Dewpoint (°C) | 12 | 12 | 13 | 13 | 13 | 13 | 12 | 13 | 13 | 13 | 14 | 14 | 14 | 16 | 16 | 16 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 18 |
| Heat Index (°C) | ||||||||||||||||||||||||
| Surface Wind (mph) | 2 | 2 | 2 | 2 | 2 | 3 | 6 | 8 | 9 | 10 | 11 | 11 | 11 | 10 | 10 | 9 | 9 | 9 | 8 | 9 | 9 | 9 | 10 | 10 |
| Wind Dir | NW | W | W | W | S | SE | S | S | S | S | S | S | S | S | S | S | S | S | S | S | SW | SW | SW | SW |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 4 | 4 | 3 | 24 | 14 | 23 | 34 | 36 | 34 | 43 | 43 | 25 | 26 | 21 | 28 | 33 | 54 | 58 | 49 | 45 | 51 | 47 | 62 | 67 |
| Precipitation Potential (%) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 3 | 4 | 7 |
| Relative Humidity (%) | 90 | 81 | 75 | 68 | 65 | 61 | 55 | 57 | 55 | 55 | 59 | 55 | 61 | 66 | 73 | 78 | 84 | 84 | 84 | 84 | 87 | 84 | 87 | 90 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Date | 07/21 | |||||||||||||||||||||||
| Hour (EDT) | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 |
| Temperature (°C) | 19 | 19 | 19 | 19 | 21 | 21 | 21 | 22 | 22 | 22 | 22 | 22 | 23 | 22 | 22 | 21 | 20 | 19 | 19 | 19 | 18 | 17 | 17 | 17 |
| Dewpoint (°C) | 18 | 18 | 18 | 18 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 20 | 20 | 19 | 19 | 19 | 18 | 18 | 18 | 17 | 16 | 16 | 15 | 14 |
| Heat Index (°C) | ||||||||||||||||||||||||
| Surface Wind (mph) | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 9 | 9 | 8 | 7 | 6 | 5 | 5 | 6 | 6 | 6 | 6 | 6 | 7 | 7 |
| Wind Dir | SW | SW | SW | S | SW | SW | S | S | S | S | SW | SW | SW | SW | W | W | NW | NW | NW | NW | NW | NW | NW | NW |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 82 | 71 | 62 | 69 | 64 | 59 | 67 | 69 | 72 | 74 | 63 | 51 | 40 | 38 | 37 | 36 | 31 | 26 | 21 | 18 | 15 | 11 | 12 | 12 |
| Precipitation Potential (%) | 7 | 10 | 19 | 56 | 60 | 63 | 66 | 69 | 72 | 75 | 63 | 51 | 39 | 26 | 14 | 2 | 2 | 2 | 1 | 1 | 0 | 0 | 0 | 0 |
| Relative Humidity (%) | 90 | 93 | 93 | 93 | 90 | 90 | 90 | 87 | 87 | 84 | 84 | 87 | 84 | 84 | 87 | 87 | 90 | 93 | 90 | 90 | 90 | 90 | 87 | 84 |
| Rain | -- | -- | SChc | Lkly | Lkly | Lkly | Lkly | Lkly | Lkly | Ocnl | Lkly | Chc | Chc | Chc | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | SChc | SChc | SChc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
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