| Point Forecast: Chappaqua NY 41.17N 73.77W (Elev. 166 m) |
Last Update: 2:49 pm EDT Jul 20, 2026 |
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| Date | 07/21 | |||||||||||||||||||||||
| 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 (°C) | 19 | 18 | 18 | 18 | 18 | 18 | 18 | 19 | 21 | 21 | 23 | 24 | 24 | 24 | 24 | 25 | 24 | 24 | 23 | 23 | 22 | 22 | 22 | 22 |
| Dewpoint (°C) | 16 | 16 | 17 | 17 | 17 | 17 | 18 | 18 | 19 | 19 | 19 | 19 | 20 | 21 | 22 | 22 | 22 | 23 | 23 | 23 | 22 | 22 | 22 | 22 |
| Heat Index (°C) | 24 | 24 | 24 | 24 | 25 | 24 | 24 | |||||||||||||||||
| Surface Wind (mph) | 6 | 5 | 5 | 5 | 5 | 5 | 5 | 6 | 7 | 9 | 10 | 11 | 11 | 11 | 10 | 10 | 9 | 9 | 8 | 8 | 7 | 7 | 7 | 7 |
| Wind Dir | S | S | S | S | S | SE | SE | SE | SE | SE | SE | SE | SE | SE | SE | SE | SE | S | S | S | S | S | S | SW |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 44 | 54 | 64 | 70 | 76 | 81 | 80 | 79 | 78 | 81 | 83 | 86 | 87 | 88 | 89 | 90 | 90 | 91 | 96 | 96 | 93 | 92 | 92 | 84 |
| Precipitation Potential (%) | 0 | 0 | 0 | 0 | 0 | 2 | 2 | 3 | 29 | 29 | 29 | 62 | 62 | 62 | 61 | 61 | 61 | 70 | 94 | 94 | 87 | 87 | 87 | 71 |
| Relative Humidity (%) | 81 | 87 | 90 | 93 | 93 | 93 | 100 | 97 | 90 | 90 | 79 | 76 | 76 | 79 | 85 | 85 | 87 | 94 | 97 | 100 | 100 | 100 | 100 | 100 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | Chc | Chc | Chc | Lkly | Lkly | Lkly | Lkly | Lkly | Lkly | Lkly | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Lkly |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | SChc | SChc | SChc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | SChc |
| Date | 07/22 | |||||||||||||||||||||||
| 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 (°C) | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 20 | 21 | 22 | 24 | 25 | 26 | 27 | 27 | 27 | 27 | 26 | 25 | 24 | 23 | 22 | 21 | 20 |
| Dewpoint (°C) | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 20 | 21 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 21 | 21 | 20 | 19 | 18 | 17 |
| Heat Index (°C) | 24 | 25 | 26 | 29 | 29 | 29 | 28 | 26 | 25 | 24 | ||||||||||||||
| Surface Wind (mph) | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 8 | 8 | 8 | 8 | 9 | 9 | 9 | 9 | 8 | 7 | 7 | 6 | 6 | 6 | 6 |
| Wind Dir | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | W | W | W | W | W | W | NW | NW | NW |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 83 | 82 | 81 | 83 | 85 | 88 | 81 | 75 | 68 | 65 | 65 | 65 | 65 | 65 | 75 | 75 | 75 | 75 | 75 | 75 | 39 | 38 | 36 | 35 |
| Precipitation Potential (%) | 71 | 71 | 29 | 29 | 29 | 29 | 29 | 29 | 48 | 48 | 48 | 48 | 48 | 48 | 62 | 62 | 62 | 62 | 62 | 62 | 7 | 7 | 7 | 7 |
| Relative Humidity (%) | 100 | 100 | 100 | 97 | 100 | 100 | 100 | 100 | 100 | 97 | 90 | 85 | 79 | 77 | 77 | 77 | 74 | 77 | 79 | 82 | 84 | 84 | 81 | 84 |
| Rain | Lkly | Lkly | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Lkly | Lkly | Lkly | Lkly | Lkly | Lkly | -- | -- | -- | -- |
| Thunder | SChc | SChc | -- | -- | -- | -- | -- | -- | -- | -- | -- | SChc | SChc | SChc | Chc | Chc | Chc | Chc | Chc | Chc | -- | -- | -- | -- |
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