| Point Forecast: Cape Cod Coast Guard Air Station MA 41.65N 70.53W (Elev. 102 ft) |
Last Update: 9:57 pm EDT Aug 18, 2026 |
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| Date | 08/19 | |||||||||||||||||||||||
| 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 (°F) | 68 | 68 | 68 | 69 | 69 | 69 | 69 | 70 | 72 | 75 | 77 | 79 | 80 | 81 | 81 | 81 | 80 | 81 | 79 | 77 | 75 | 72 | 72 | 71 |
| Dewpoint (°F) | 68 | 68 | 68 | 69 | 69 | 69 | 69 | 70 | 71 | 72 | 72 | 72 | 72 | 71 | 70 | 70 | 70 | 70 | 70 | 70 | 70 | 70 | 70 | 70 |
| Heat Index (°F) | 75 | 77 | 79 | 84 | 85 | 85 | 85 | 83 | 85 | 79 | 77 | 75 | ||||||||||||
| Surface Wind (mph) | 0 | 0 | 3 | 2 | 2 | 3 | 3 | 3 | 5 | 6 | 8 | 9 | 10 | 11 | 11 | 13 | 14 | 13 | 11 | 10 | 9 | 8 | 7 | 7 |
| Wind Dir | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 50 | 45 | 40 | 57 | 57 | 62 | 61 | 57 | 47 | 35 | 33 | 17 | 30 | 19 | 34 | 34 | 39 | 53 | 23 | 19 | 26 | 44 | 39 | 43 |
| Precipitation Potential (%) | 3 | 2 | 5 | 3 | 3 | 2 | 2 | 4 | 3 | 4 | 2 | 2 | 4 | 3 | 3 | 2 | 4 | 3 | 3 | 3 | 0 | 0 | 0 | 0 |
| Relative Humidity (%) | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 97 | 90 | 85 | 79 | 77 | 72 | 69 | 69 | 72 | 69 | 74 | 79 | 84 | 93 | 93 | 97 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Date | 08/20 | |||||||||||||||||||||||
| 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 (°F) | 71 | 71 | 71 | 70 | 70 | 70 | 69 | 71 | 72 | 75 | 78 | 81 | 82 | 82 | 81 | 81 | 81 | 80 | 78 | 75 | 73 | 72 | 71 | 70 |
| Dewpoint (°F) | 70 | 69 | 69 | 69 | 69 | 68 | 68 | 68 | 69 | 69 | 69 | 69 | 69 | 69 | 69 | 69 | 69 | 69 | 69 | 69 | 69 | 69 | 68 | 68 |
| Heat Index (°F) | 75 | 78 | 84 | 85 | 85 | 84 | 84 | 84 | 83 | 78 | 75 | |||||||||||||
| Surface Wind (mph) | 6 | 6 | 6 | 5 | 3 | 3 | 2 | 3 | 5 | 5 | 6 | 7 | 8 | 9 | 9 | 9 | 9 | 9 | 8 | 7 | 6 | 5 | 2 | 1 |
| Wind Dir | SW | SW | SW | SW | SW | SW | SW | W | W | W | W | W | W | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 48 | 48 | 55 | 58 | 42 | 46 | 50 | 53 | 41 | 76 | 49 | 21 | 26 | 32 | 37 | 38 | 40 | 41 | 45 | 48 | 52 | 55 | 59 | 62 |
| Precipitation Potential (%) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 2 | 5 | 6 | 7 | 8 | 10 | 11 | 11 | 12 | 14 | 15 |
| Relative Humidity (%) | 97 | 93 | 93 | 97 | 97 | 93 | 97 | 90 | 90 | 82 | 74 | 67 | 65 | 65 | 67 | 67 | 67 | 69 | 74 | 82 | 87 | 90 | 90 | 93 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | SChc |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
