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| Point Forecast: Marlborough MA 42.36N 71.55W (Elev. 136 m) |
Last Update: 10:18 pm EDT Sep 18, 2021 |
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| Date | 09/19 | |||||||||||||||||||||||
| 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 (°C) | 18 | 17 | 17 | 17 | 16 | 16 | 14 | 14 | 15 | 17 | 18 | 19 | 20 | 21 | 22 | 22 | 22 | 21 | 20 | 18 | 16 | 14 | 14 | 13 |
| Dewpoint (°C) | 17 | 16 | 15 | 14 | 14 | 13 | 12 | 12 | 12 | 12 | 12 | 12 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 |
| Heat Index (°C) | ||||||||||||||||||||||||
| Surface Wind (mph) | 6 | 6 | 7 | 7 | 7 | 7 | 7 | 8 | 8 | 8 | 8 | 8 | 7 | 7 | 7 | 6 | 6 | 5 | 3 | 2 | 2 | 1 | 1 | 2 |
| Wind Dir | NW | NW | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | NE | SE | S | SW | W |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 59 | 57 | 47 | 48 | 49 | 52 | 30 | 22 | 15 | 10 | 7 | 2 | 2 | 2 | 3 | 2 | 1 | 1 | 1 | 2 | 2 | 2 | 1 | 1 |
| Precipitation Potential (%) | 6 | 5 | 6 | 4 | 3 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Relative Humidity (%) | 90 | 93 | 90 | 87 | 90 | 84 | 86 | 86 | 83 | 72 | 67 | 63 | 57 | 51 | 49 | 48 | 49 | 51 | 54 | 63 | 72 | 77 | 80 | 86 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Date | 09/20 | |||||||||||||||||||||||
| 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 (°C) | 13 | 13 | 12 | 11 | 11 | 11 | 11 | 12 | 12 | 15 | 18 | 19 | 21 | 22 | 22 | 22 | 22 | 21 | 20 | 18 | 16 | 14 | 13 | 13 |
| Dewpoint (°C) | 10 | 10 | 9 | 9 | 9 | 9 | 10 | 10 | 11 | 11 | 12 | 12 | 12 | 13 | 13 | 13 | 13 | 13 | 12 | 12 | 12 | 11 | 11 | 11 |
| Heat Index (°C) | ||||||||||||||||||||||||
| Surface Wind (mph) | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 3 | 3 | 5 | 5 | 6 | 6 | 6 | 6 | 5 | 5 | 3 | 3 | 2 | 2 |
| Wind Dir | W | NW | NW | NW | NW | NW | N | N | N | N | E | E | E | E | E | E | E | E | E | E | E | SE | SE | SE |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 1 | 2 | 3 | 4 | 4 | 5 | 5 | 5 | 4 | 4 | 4 | 4 | 6 | 8 | 10 | 10 | 9 | 9 | 10 | 10 | 11 | 9 | 7 | 5 |
| Precipitation Potential (%) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Relative Humidity (%) | 83 | 83 | 86 | 89 | 89 | 93 | 93 | 89 | 90 | 78 | 67 | 63 | 59 | 57 | 57 | 55 | 57 | 59 | 61 | 70 | 78 | 83 | 86 | 86 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
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