| Point Forecast: Grand Island NY 43.03N 78.97W (Elev. 597 ft) |
Last Update: 5:18 am EDT Jul 17, 2026 |
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| Date | 07/17 | 07/18 | ||||||||||||||||||||||
| Hour (EDT) | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 |
| Temperature (°F) | 65 | 68 | 72 | 76 | 78 | 80 | 81 | 82 | 83 | 83 | 83 | 83 | 81 | 78 | 73 | 71 | 70 | 69 | 68 | 69 | 68 | 69 | 70 | 70 |
| Dewpoint (°F) | 58 | 60 | 59 | 58 | 58 | 58 | 59 | 59 | 59 | 59 | 59 | 60 | 59 | 60 | 60 | 61 | 61 | 61 | 61 | 61 | 61 | 62 | 62 | 63 |
| Heat Index (°F) | 76 | 78 | 80 | 81 | 82 | 83 | 83 | 83 | 83 | 81 | 78 | |||||||||||||
| Surface Wind (mph) | 1 | 1 | 1 | 2 | 2 | 3 | 5 | 6 | 6 | 6 | 7 | 6 | 6 | 5 | 5 | 3 | 5 | 5 | 5 | 6 | 7 | 8 | 9 | 10 |
| Wind Dir | SE | SE | SE | S | SW | W | W | W | SW | SW | SW | SW | SW | SW | S | S | S | S | S | S | S | S | S | S |
| Gust | 20 | |||||||||||||||||||||||
| Sky Cover (%) | 47 | 55 | 55 | 47 | 46 | 40 | 42 | 53 | 35 | 33 | 35 | 39 | 30 | 36 | 35 | 26 | 26 | 30 | 36 | 36 | 27 | 48 | 56 | 55 |
| Precipitation Potential (%) | 0 | 1 | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 3 | 3 | 3 | 3 | 2 | 3 | 9 | 15 | 24 | 34 | 32 |
| Relative Humidity (%) | 79 | 74 | 63 | 55 | 50 | 48 | 46 | 46 | 45 | 45 | 44 | 46 | 48 | 55 | 64 | 70 | 73 | 76 | 78 | 78 | 78 | 78 | 77 | 80 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | SChc | SChc | Chc | Chc |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | SChc | SChc | Chc | Chc |
| Date | 07/19 | |||||||||||||||||||||||
| Hour (EDT) | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 |
| Temperature (°F) | 70 | 73 | 76 | 79 | 80 | 82 | 82 | 82 | 81 | 80 | 79 | 78 | 77 | 76 | 73 | 71 | 69 | 68 | 66 | 65 | 63 | 62 | 62 | 62 |
| Dewpoint (°F) | 64 | 67 | 69 | 70 | 71 | 72 | 73 | 74 | 74 | 73 | 73 | 72 | 70 | 69 | 67 | 66 | 64 | 64 | 62 | 62 | 60 | 60 | 59 | 59 |
| Heat Index (°F) | 76 | 82 | 84 | 86 | 88 | 87 | 86 | 83 | 79 | 78 | 77 | 76 | ||||||||||||
| Surface Wind (mph) | 11 | 13 | 14 | 16 | 17 | 18 | 18 | 18 | 17 | 16 | 14 | 13 | 10 | 9 | 9 | 9 | 8 | 8 | 7 | 7 | 7 | 6 | 6 | 6 |
| Wind Dir | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | W | W | W | W | NW | NW | NW | NW | N | N | N | N | N |
| Gust | 21 | 24 | 26 | 28 | 30 | 30 | 30 | 29 | 26 | |||||||||||||||
| Sky Cover (%) | 72 | 81 | 81 | 81 | 71 | 71 | 71 | 94 | 94 | 94 | 98 | 98 | 98 | 91 | 99 | 74 | 49 | 41 | 33 | 26 | 25 | 24 | 24 | 23 |
| Precipitation Potential (%) | 33 | 45 | 45 | 45 | 51 | 51 | 51 | 74 | 74 | 74 | 92 | 92 | 92 | 12 | 12 | 12 | 12 | 12 | 12 | 1 | 1 | 1 | 1 | 1 |
| Relative Humidity (%) | 82 | 81 | 78 | 75 | 73 | 73 | 74 | 77 | 79 | 81 | 81 | 81 | 78 | 79 | 82 | 84 | 85 | 86 | 88 | 89 | 91 | 92 | 91 | 90 |
| Rain | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Lkly | Lkly | Lkly | Ocnl | Ocnl | Ocnl | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | Chc | Chc | Chc | Chc | SChc | SChc | SChc | Chc | Chc | Chc | Chc | Chc | Chc | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
