| Point Forecast: Sterling MA 42.43N 71.74W (Elev. 198 m) |
Last Update: 1:49 pm EDT Aug 17, 2026 |
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| Date | 08/17 | 08/18 | ||||||||||||||||||||||
| Hour (EDT) | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 |
| Temperature (°C) | 23 | 23 | 23 | 23 | 22 | 20 | 19 | 19 | 20 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 21 | 22 | 23 | 24 | 25 | 26 | 26 | 27 |
| Dewpoint (°C) | 22 | 22 | 22 | 22 | 21 | 20 | 19 | 19 | 20 | 19 | 19 | 19 | 19 | 19 | 18 | 19 | 20 | 21 | 22 | 22 | 22 | 22 | 22 | 22 |
| Heat Index (°C) | 24 | 25 | 26 | 26 | 28 | |||||||||||||||||||
| Surface Wind (mph) | 5 | 3 | 3 | 2 | 2 | 1 | 1 | 1 | 1 | 0 | 0 | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 3 | 3 |
| Wind Dir | S | SE | SE | SE | SE | E | E | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | NW |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 78 | 68 | 69 | 68 | 56 | 52 | 44 | 55 | 69 | 77 | 77 | 82 | 70 | 78 | 81 | 79 | 78 | 85 | 83 | 74 | 65 | 66 | 76 | 39 |
| Precipitation Potential (%) | 17 | 17 | 15 | 18 | 13 | 11 | 10 | 9 | 9 | 9 | 11 | 11 | 8 | 9 | 8 | 6 | 7 | 8 | 8 | 10 | 11 | 17 | 18 | 18 |
| Relative Humidity (%) | 95 | 92 | 95 | 95 | 97 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 97 | 97 | 97 | 97 | 90 | 90 | 85 | 82 | 77 | 74 |
| Rain | SChc | SChc | SChc | SChc | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | SChc | SChc | SChc |
| Thunder | SChc | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | SChc | SChc |
| Date | 08/19 | |||||||||||||||||||||||
| Hour (EDT) | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 |
| Temperature (°C) | 27 | 26 | 26 | 24 | 23 | 21 | 20 | 19 | 19 | 18 | 18 | 18 | 17 | 17 | 17 | 17 | 19 | 21 | 23 | 26 | 27 | 28 | 28 | 28 |
| Dewpoint (°C) | 22 | 21 | 21 | 22 | 21 | 20 | 19 | 19 | 19 | 18 | 18 | 18 | 17 | 17 | 17 | 17 | 18 | 19 | 19 | 19 | 18 | 18 | 17 | 17 |
| Heat Index (°C) | 28 | 26 | 26 | 24 | 26 | 28 | 28 | 29 | 29 | |||||||||||||||
| Surface Wind (mph) | 3 | 3 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 3 | 5 | 6 | 7 | 7 |
| Wind Dir | NW | N | NW | N | NE | NW | NW | NW | NW | NW | NW | W | W | W | W | W | W | W | W | W | W | W | W | W |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 40 | 39 | 55 | 37 | 41 | 29 | 42 | 53 | 53 | 58 | 60 | 60 | 63 | 54 | 67 | 71 | 39 | 23 | 15 | 7 | 9 | 10 | 12 | 10 |
| Precipitation Potential (%) | 20 | 19 | 19 | 17 | 7 | 5 | 8 | 6 | 6 | 4 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Relative Humidity (%) | 74 | 74 | 76 | 85 | 87 | 93 | 97 | 97 | 100 | 100 | 97 | 100 | 100 | 100 | 99 | 100 | 97 | 87 | 76 | 67 | 60 | 55 | 52 | 50 |
| Rain | SChc | SChc | SChc | SChc | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | SChc | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
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