| Point Forecast: Nantucket Memorial Airport MA 41.28N 70.09W (Elev. 3 ft) |
Last Update: 7:23 am EDT Jul 18, 2025 |
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| Date | 07/18 | 07/19 | ||||||||||||||||||||||
| Hour (EDT) | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 |
| Temperature (°F) | 77 | 77 | 77 | 77 | 77 | 77 | 77 | 76 | 75 | 73 | 71 | 69 | 68 | 67 | 67 | 67 | 66 | 65 | 64 | 64 | 66 | 68 | 72 | 74 |
| Dewpoint (°F) | 65 | 64 | 63 | 63 | 62 | 62 | 61 | 61 | 61 | 61 | 61 | 61 | 61 | 61 | 61 | 61 | 62 | 62 | 62 | 62 | 63 | 63 | 64 | 64 |
| Heat Index (°F) | 77 | 77 | 77 | 77 | 77 | 77 | 77 | 76 | 75 | |||||||||||||||
| Surface Wind (mph) | 13 | 13 | 11 | 11 | 11 | 10 | 9 | 7 | 6 | 5 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 5 |
| Wind Dir | NW | N | N | N | N | N | N | NE | NE | S | S | S | S | S | S | S | SW | SW | SW | SW | S | SW | SW | S |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 22 | 27 | 31 | 27 | 46 | 32 | 63 | 41 | 41 | 31 | 28 | 29 | 21 | 26 | 21 | 10 | 10 | 16 | 22 | 16 | 9 | 0 | 11 | 21 |
| 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 (%) | 67 | 64 | 62 | 62 | 60 | 60 | 58 | 60 | 62 | 66 | 71 | 76 | 78 | 81 | 81 | 81 | 87 | 90 | 93 | 93 | 90 | 84 | 76 | 71 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Date | 07/20 | |||||||||||||||||||||||
| Hour (EDT) | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 |
| Temperature (°F) | 76 | 77 | 77 | 77 | 77 | 77 | 77 | 76 | 74 | 73 | 71 | 70 | 69 | 69 | 68 | 68 | 68 | 68 | 68 | 69 | 70 | 71 | 72 | 74 |
| Dewpoint (°F) | 64 | 63 | 62 | 62 | 62 | 63 | 63 | 64 | 64 | 63 | 63 | 63 | 64 | 64 | 64 | 65 | 65 | 65 | 66 | 66 | 67 | 67 | 68 | 69 |
| Heat Index (°F) | 76 | 77 | 77 | 77 | 77 | 77 | 77 | 76 | ||||||||||||||||
| Surface Wind (mph) | 6 | 6 | 7 | 8 | 9 | 9 | 9 | 9 | 9 | 8 | 8 | 8 | 9 | 9 | 9 | 9 | 9 | 9 | 10 | 10 | 10 | 10 | 10 | 11 |
| 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 (%) | 18 | 14 | 17 | 21 | 24 | 24 | 23 | 23 | 23 | 24 | 24 | 30 | 36 | 42 | 48 | 54 | 60 | 65 | 70 | 75 | 70 | 65 | 61 | 63 |
| Precipitation Potential (%) | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 2 | 2 | 4 | 6 | 9 | 11 | 13 | 17 | 21 | 25 | 29 | 33 | 37 | 39 | 40 | 42 | 44 |
| Relative Humidity (%) | 66 | 62 | 60 | 59 | 60 | 61 | 64 | 66 | 69 | 73 | 76 | 79 | 82 | 84 | 87 | 89 | 90 | 91 | 91 | 90 | 90 | 89 | 87 | 84 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | SChc | SChc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
