| Point Forecast: Grand Blanc MI 42.94N 83.62W (Elev. 255 m) |
Last Update: 9:49 am EDT Sep 16, 2026 |
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| Date | 09/16 | 09/17 | ||||||||||||||||||||||
| Hour (EDT) | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 |
| Temperature (°C) | 20 | 21 | 21 | 22 | 21 | 21 | 21 | 19 | 19 | 18 | 17 | 17 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 17 | 18 | 19 |
| Dewpoint (°C) | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 16 | 17 | 16 | 16 | 15 | 15 | 15 | 15 | 15 | 15 | 16 | 16 | 16 | 16 | 17 | 17 | 17 |
| Heat Index (°C) | ||||||||||||||||||||||||
| Surface Wind (mph) | 7 | 7 | 7 | 7 | 7 | 6 | 6 | 6 | 6 | 5 | 5 | 3 | 3 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 3 | 3 | 3 |
| Wind Dir | NE | NE | NE | NE | NE | ENE | ENE | NE | ENE | ENE | E | E | E | E | E | ENE | ENE | E | NE | ENE | NE | E | NNE | NNE |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 92 | 89 | 81 | 86 | 90 | 82 | 84 | 84 | 68 | 51 | 63 | 70 | 61 | 53 | 46 | 55 | 50 | 48 | 67 | 67 | 64 | 66 | 55 | 57 |
| Precipitation Potential (%) | 16 | 16 | 16 | 16 | 16 | 16 | 17 | 18 | 18 | 23 | 29 | 34 | 33 | 32 | 37 | 27 | 24 | 30 | 24 | 15 | 6 | 4 | 7 | 24 |
| Relative Humidity (%) | 82 | 80 | 78 | 77 | 80 | 78 | 79 | 81 | 83 | 90 | 92 | 90 | 92 | 91 | 93 | 95 | 95 | 100 | 97 | 98 | 98 | 96 | 92 | 87 |
| Rain | SChc | SChc | SChc | SChc | SChc | SChc | SChc | SChc | SChc | SChc | Chc | Chc | Chc | Chc | Chc | Chc | SChc | Chc | SChc | SChc | -- | -- | -- | SChc |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | SChc | SChc | SChc | SChc | SChc | SChc | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Date | 09/18 | |||||||||||||||||||||||
| Hour (EDT) | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 |
| Temperature (°C) | 20 | 22 | 23 | 23 | 23 | 22 | 22 | 21 | 19 | 18 | 17 | 17 | 16 | 16 | 15 | 14 | 14 | 13 | 12 | 12 | 12 | 14 | 17 | 19 |
| Dewpoint (°C) | 17 | 17 | 18 | 17 | 17 | 17 | 17 | 17 | 17 | 16 | 16 | 16 | 15 | 14 | 14 | 13 | 13 | 12 | 12 | 12 | 12 | 13 | 13 | 14 |
| Heat Index (°C) | ||||||||||||||||||||||||
| Surface Wind (mph) | 5 | 5 | 6 | 6 | 6 | 5 | 5 | 3 | 3 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 3 | 3 | 3 | 3 | 3 | 5 | 5 | 6 |
| Wind Dir | NNE | N | N | NNW | NNW | NNW | NNW | N | N | N | NNE | NNE | NNE | NNE | NNE | NNE | NNE | NNE | NNE | NNE | NNE | NNE | NE | NE |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 60 | 55 | 58 | 57 | 53 | 38 | 40 | 50 | 66 | 64 | 61 | 58 | 53 | 48 | 43 | 43 | 43 | 43 | 44 | 44 | 45 | 42 | 38 | 35 |
| Precipitation Potential (%) | 10 | 3 | 11 | 8 | 12 | 9 | 5 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Relative Humidity (%) | 83 | 77 | 73 | 71 | 69 | 72 | 72 | 73 | 83 | 90 | 93 | 93 | 93 | 93 | 94 | 94 | 94 | 95 | 98 | 100 | 99 | 91 | 81 | 73 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
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