| Point Forecast: Boston MA 42.36N 71.07W (Elev. 13 ft) |
Last Update: 1:42 pm EDT Apr 21, 2026 |
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| Date | 04/21 | 04/22 | ||||||||||||||||||||||
| Hour (EDT) | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 |
| Temperature (°F) | 39 | 39 | 38 | 38 | 39 | 39 | 39 | 40 | 40 | 41 | 43 | 44 | 45 | 46 | 46 | 47 | 47 | 47 | 47 | 47 | 46 | 46 | 45 | 44 |
| Dewpoint (°F) | 27 | 28 | 29 | 29 | 30 | 31 | 31 | 32 | 33 | 34 | 35 | 35 | 36 | 36 | 36 | 36 | 36 | 36 | 37 | 37 | 37 | 38 | 38 | 38 |
| Heat Index (°F) | ||||||||||||||||||||||||
| Surface Wind (mph) | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 7 | 8 | 9 | 10 | 10 | 10 | 10 | 10 | 9 | 7 | 6 | 6 | 5 | 3 |
| Wind Dir | S | S | S | S | S | S | S | S | S | S | S | S | S | S | S | S | S | S | S | S | S | S | S | S |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 30 | 49 | 49 | 50 | 48 | 61 | 70 | 73 | 75 | 79 | 86 | 91 | 94 | 93 | 91 | 93 | 90 | 92 | 93 | 93 | 92 | 89 | 87 | 81 |
| Precipitation Potential (%) | 2 | 2 | 1 | 1 | 4 | 9 | 15 | 21 | 26 | 27 | 29 | 35 | 40 | 45 | 51 | 54 | 50 | 43 | 36 | 28 | 21 | 18 | 18 | 18 |
| Relative Humidity (%) | 62 | 64 | 68 | 69 | 70 | 73 | 73 | 73 | 76 | 76 | 73 | 70 | 70 | 68 | 68 | 66 | 66 | 66 | 69 | 69 | 70 | 73 | 76 | 79 |
| Rain | -- | -- | -- | -- | -- | -- | SChc | SChc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | SChc | SChc | SChc | SChc |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Date | 04/23 | |||||||||||||||||||||||
| Hour (EDT) | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 |
| Temperature (°F) | 44 | 44 | 43 | 43 | 43 | 42 | 43 | 43 | 44 | 46 | 48 | 51 | 54 | 56 | 57 | 58 | 59 | 60 | 59 | 58 | 55 | 53 | 51 | 49 |
| Dewpoint (°F) | 39 | 39 | 40 | 40 | 40 | 40 | 40 | 40 | 41 | 41 | 41 | 41 | 40 | 38 | 36 | 34 | 32 | 30 | 29 | 29 | 29 | 29 | 29 | 29 |
| Heat Index (°F) | ||||||||||||||||||||||||
| Surface Wind (mph) | 3 | 3 | 3 | 2 | 2 | 2 | 2 | 3 | 3 | 5 | 6 | 7 | 8 | 9 | 10 | 10 | 11 | 10 | 10 | 9 | 8 | 7 | 7 | 6 |
| Wind Dir | S | S | S | S | SW | SW | SW | W | W | W | W | NW | NW | NW | NW | NW | NW | NW | NW | NW | N | N | N | NW |
| Gust | 20 | |||||||||||||||||||||||
| Sky Cover (%) | 74 | 77 | 80 | 83 | 81 | 79 | 77 | 68 | 58 | 49 | 46 | 44 | 41 | 40 | 38 | 37 | 32 | 28 | 23 | 19 | 15 | 11 | 12 | 14 |
| Precipitation Potential (%) | 18 | 18 | 18 | 18 | 18 | 17 | 17 | 17 | 16 | 16 | 16 | 16 | 16 | 16 | 15 | 15 | 15 | 15 | 16 | 10 | 6 | 3 | 3 | 2 |
| Relative Humidity (%) | 82 | 85 | 88 | 90 | 91 | 91 | 90 | 89 | 87 | 83 | 75 | 67 | 59 | 51 | 45 | 40 | 35 | 32 | 31 | 33 | 36 | 40 | 43 | 46 |
| Rain | SChc | SChc | SChc | SChc | SChc | SChc | SChc | SChc | SChc | SChc | SChc | SChc | SChc | SChc | SChc | SChc | SChc | SChc | SChc | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | SChc | SChc | SChc | SChc | SChc | SChc | SChc | SChc | SChc | SChc | -- | -- | -- | -- | -- |
