| Point Forecast: Sterling MA 42.43N 71.74W (Elev. 650 ft) |
Last Update: 2:32 pm EDT Jul 21, 2026 |
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| Date | 07/21 | 07/22 | ||||||||||||||||||||||
| Hour (EDT) | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 |
| Temperature (°F) | 68 | 68 | 68 | 68 | 68 | 68 | 66 | 68 | 67 | 68 | 71 | 73 | 75 | 77 | 78 | 80 | 80 | 80 | 81 | 79 | 78 | 76 | 72 | 69 |
| Dewpoint (°F) | 68 | 68 | 68 | 68 | 68 | 68 | 66 | 68 | 67 | 68 | 70 | 72 | 73 | 73 | 72 | 72 | 72 | 71 | 70 | 69 | 67 | 66 | 63 | 61 |
| Heat Index (°F) | 75 | 77 | 78 | 84 | 84 | 83 | 85 | 79 | 78 | 76 | ||||||||||||||
| Surface Wind (mph) | 6 | 6 | 6 | 6 | 6 | 7 | 7 | 8 | 8 | 8 | 8 | 8 | 9 | 9 | 10 | 10 | 10 | 10 | 10 | 9 | 8 | 7 | 6 | 6 |
| Wind Dir | S | S | S | S | SW | S | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | W | W | W | W |
| Gust | 20 | 21 | 21 | 21 | 20 | |||||||||||||||||||
| Sky Cover (%) | 88 | 88 | 94 | 92 | 92 | 89 | 80 | 82 | 92 | 81 | 67 | 66 | 33 | 63 | 55 | 50 | 64 | 63 | 61 | 57 | 56 | 52 | 34 | 31 |
| Precipitation Potential (%) | 79 | 47 | 32 | 29 | 32 | 27 | 26 | 29 | 29 | 26 | 23 | 20 | 18 | 18 | 21 | 25 | 46 | 44 | 41 | 36 | 34 | 28 | 15 | 11 |
| Relative Humidity (%) | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 97 | 97 | 94 | 88 | 82 | 77 | 77 | 74 | 69 | 72 | 69 | 71 | 73 | 76 |
| Rain | Ocnl | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | SChc | SChc | SChc | SChc | SChc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | SChc | -- |
| Thunder | Chc | SChc | SChc | SChc | SChc | SChc | -- | -- | -- | -- | -- | -- | -- | SChc | SChc | SChc | Chc | Chc | Chc | SChc | SChc | SChc | -- | -- |
| Date | 07/23 | |||||||||||||||||||||||
| Hour (EDT) | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 |
| Temperature (°F) | 67 | 65 | 64 | 62 | 61 | 59 | 59 | 58 | 57 | 59 | 62 | 64 | 68 | 71 | 73 | 75 | 76 | 78 | 78 | 77 | 75 | 72 | 69 | 66 |
| Dewpoint (°F) | 59 | 58 | 57 | 56 | 55 | 55 | 54 | 53 | 53 | 55 | 55 | 55 | 55 | 54 | 54 | 53 | 53 | 52 | 52 | 52 | 53 | 54 | 55 | 55 |
| Heat Index (°F) | 75 | 76 | 78 | 78 | 77 | 75 | ||||||||||||||||||
| Surface Wind (mph) | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 5 | 5 | 3 | 3 | 2 | 2 |
| Wind Dir | W | W | W | W | W | W | W | W | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 25 | 33 | 43 | 42 | 47 | 42 | 62 | 31 | 19 | 39 | 8 | 4 | 4 | 3 | 4 | 4 | 5 | 5 | 5 | 5 | 4 | 4 | 3 | 2 |
| Precipitation Potential (%) | 9 | 8 | 6 | 2 | 0 | 0 | 0 | 0 | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Relative Humidity (%) | 75 | 78 | 78 | 81 | 81 | 87 | 83 | 83 | 86 | 87 | 78 | 73 | 63 | 55 | 51 | 46 | 45 | 40 | 40 | 42 | 46 | 53 | 61 | 68 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
