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| Point Forecast: Arlington MA 42.42N 71.18W (Elev. 249 ft) |
Last Update: 5:57 am EDT Apr 19, 2024 |
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| Date | 04/19 | 04/20 | ||||||||||||||||||||||
| Hour (EDT) | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 |
| Temperature (°F) | 55 | 55 | 54 | 53 | 51 | 49 | 47 | 46 | 46 | 46 | 46 | 46 | 46 | 46 | 46 | 47 | 48 | 50 | 51 | 53 | 55 | 57 | 59 | 61 |
| Dewpoint (°F) | 35 | 35 | 35 | 36 | 36 | 37 | 37 | 37 | 37 | 38 | 38 | 40 | 40 | 41 | 42 | 43 | 43 | 44 | 43 | 42 | 42 | 41 | 40 | 39 |
| Heat Index (°F) | ||||||||||||||||||||||||
| Surface Wind (mph) | 10 | 11 | 11 | 11 | 11 | 10 | 10 | 10 | 9 | 9 | 9 | 9 | 9 | 8 | 7 | 7 | 7 | 6 | 7 | 7 | 8 | 9 | 10 | 10 |
| Wind Dir | SE | SE | SE | SE | S | S | S | S | S | S | S | S | S | S | S | S | SW | SW | SW | W | W | W | W | W |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 75 | 75 | 77 | 79 | 70 | 72 | 67 | 73 | 79 | 86 | 93 | 100 | 100 | 100 | 100 | 98 | 100 | 100 | 93 | 90 | 88 | 85 | 83 | 80 |
| Precipitation Potential (%) | 1 | 1 | 2 | 3 | 4 | 5 | 8 | 12 | 15 | 25 | 36 | 46 | 58 | 80 | 86 | 86 | 90 | 90 | 70 | 49 | 29 | 20 | 12 | 3 |
| Relative Humidity (%) | 47 | 47 | 48 | 52 | 56 | 63 | 68 | 71 | 71 | 73 | 73 | 79 | 79 | 83 | 86 | 86 | 83 | 80 | 74 | 66 | 61 | 55 | 49 | 44 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | SChc | Chc | Chc | Chc | Lkly | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Lkly | Chc | Chc | SChc | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Date | 04/21 | |||||||||||||||||||||||
| Hour (EDT) | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 |
| Temperature (°F) | 61 | 61 | 60 | 58 | 56 | 54 | 52 | 50 | 48 | 46 | 44 | 42 | 41 | 40 | 40 | 41 | 42 | 44 | 47 | 50 | 53 | 55 | 57 | 58 |
| Dewpoint (°F) | 37 | 36 | 35 | 34 | 33 | 32 | 31 | 31 | 30 | 30 | 29 | 28 | 28 | 28 | 28 | 29 | 29 | 30 | 30 | 29 | 29 | 29 | 29 | 28 |
| Heat Index (°F) | ||||||||||||||||||||||||
| Surface Wind (mph) | 11 | 11 | 13 | 13 | 13 | 11 | 11 | 13 | 13 | 13 | 13 | 13 | 11 | 10 | 10 | 10 | 11 | 11 | 11 | 11 | 11 | 13 | 14 | 15 |
| Wind Dir | W | W | W | W | W | W | W | W | W | W | W | W | W | W | W | W | W | W | W | W | W | W | W | W |
| Gust | 21 | 24 | 23 | |||||||||||||||||||||
| Sky Cover (%) | 72 | 65 | 57 | 52 | 47 | 44 | 38 | 31 | 24 | 17 | 10 | 3 | 3 | 3 | 3 | 3 | 3 | 4 | 7 | 11 | 15 | 21 | 28 | 34 |
| Precipitation Potential (%) | 6 | 8 | 11 | 9 | 7 | 6 | 5 | 3 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Relative Humidity (%) | 41 | 39 | 39 | 40 | 42 | 43 | 44 | 48 | 49 | 53 | 55 | 57 | 59 | 62 | 62 | 62 | 60 | 57 | 51 | 44 | 39 | 37 | 34 | 32 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
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