| Point Forecast: Waltham MA 42.38N 71.24W (Elev. 98 ft) |
Last Update: 1:16 am EDT Jul 15, 2025 |
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| Date | 07/15 | 07/16 | ||||||||||||||||||||||
| Hour (EDT) | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 |
| Temperature (°F) | 73 | 73 | 74 | 76 | 79 | 83 | 86 | 88 | 88 | 88 | 88 | 87 | 86 | 85 | 83 | 79 | 78 | 77 | 75 | 74 | 73 | 72 | 72 | 71 |
| Dewpoint (°F) | 71 | 72 | 72 | 73 | 73 | 73 | 73 | 72 | 72 | 73 | 73 | 73 | 73 | 73 | 73 | 73 | 73 | 72 | 72 | 72 | 71 | 71 | 71 | 70 |
| Heat Index (°F) | 76 | 79 | 89 | 93 | 95 | 95 | 96 | 96 | 94 | 93 | 92 | 89 | 79 | 78 | 77 | 75 | ||||||||
| Surface Wind (mph) | 3 | 3 | 3 | 3 | 3 | 5 | 5 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 5 | 5 | 5 | 3 | 3 | 3 | 3 | 3 | 3 |
| Wind Dir | SW | SW | SW | SW | W | SW | SW | SW | SW | SW | S | SW | S | S | S | S | SW | SW | SW | SW | SW | SW | SW | SW |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 88 | 85 | 78 | 56 | 35 | 19 | 15 | 14 | 22 | 32 | 32 | 36 | 20 | 26 | 21 | 21 | 19 | 13 | 4 | 21 | 11 | 15 | 23 | 29 |
| Precipitation Potential (%) | 22 | 19 | 13 | 7 | 5 | 6 | 7 | 9 | 11 | 8 | 6 | 6 | 4 | 4 | 2 | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 1 |
| Relative Humidity (%) | 93 | 97 | 93 | 90 | 82 | 72 | 65 | 59 | 59 | 61 | 61 | 63 | 65 | 67 | 72 | 82 | 85 | 85 | 90 | 93 | 93 | 97 | 97 | 97 |
| Rain | SChc | SChc | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Date | 07/17 | |||||||||||||||||||||||
| Hour (EDT) | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 |
| Temperature (°F) | 72 | 74 | 76 | 79 | 83 | 86 | 88 | 89 | 90 | 91 | 91 | 90 | 89 | 87 | 85 | 83 | 81 | 79 | 78 | 77 | 76 | 75 | 75 | 75 |
| Dewpoint (°F) | 71 | 72 | 73 | 73 | 73 | 73 | 73 | 72 | 72 | 72 | 72 | 72 | 72 | 73 | 73 | 73 | 72 | 72 | 72 | 73 | 73 | 73 | 72 | 72 |
| Heat Index (°F) | 76 | 79 | 88 | 93 | 96 | 97 | 97 | 98 | 98 | 97 | 96 | 94 | 92 | 89 | 85 | 79 | 78 | 77 | 76 | 75 | 75 | 75 | ||
| Surface Wind (mph) | 3 | 3 | 3 | 3 | 5 | 6 | 6 | 6 | 6 | 7 | 8 | 8 | 8 | 7 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 |
| Wind Dir | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | S | S | S | S | S | S | SW | SW | SW | SW | SW | SW | SW | SW |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 29 | 21 | 31 | 33 | 26 | 19 | 19 | 19 | 19 | 27 | 35 | 43 | 46 | 49 | 52 | 57 | 61 | 66 | 68 | 71 | 73 | 76 | 78 | 81 |
| Precipitation Potential (%) | 1 | 1 | 1 | 2 | 4 | 6 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 12 | 13 | 13 | 14 | 14 | 16 | 18 | 20 | 22 | 24 | 26 |
| Relative Humidity (%) | 97 | 93 | 90 | 82 | 73 | 65 | 60 | 57 | 56 | 54 | 54 | 56 | 59 | 63 | 67 | 71 | 75 | 79 | 84 | 88 | 90 | 91 | 91 | 90 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | SChc | SChc | SChc | SChc | SChc | Chc |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | SChc | SChc | SChc | SChc | SChc | SChc |
