| Point Forecast: 9NM NNW Evanston IL 42.19N 87.77W |
Last Update: 9:25 pm CDT Sep 12, 2026 |
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| Date | 09/12 | 09/13 | ||||||||||||||||||||||
| Hour (CDT) | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 |
| Temperature (°C) | 22 | 22 | 21 | 21 | 19 | 19 | 18 | 18 | 18 | 18 | 19 | 20 | 21 | 22 | 22 | 21 | 20 | 19 | 20 | 19 | 20 | 19 | 18 | 17 |
| Dewpoint (°C) | 19 | 17 | 17 | 16 | 14 | 13 | 13 | 13 | 13 | 14 | 14 | 15 | 15 | 14 | 14 | 14 | 14 | 13 | 13 | 13 | 13 | 12 | 12 | 12 |
| Heat Index (°C) | ||||||||||||||||||||||||
| Surface Wind (km/h) | 16 | 14 | 14 | 14 | 14 | 13 | 14 | 13 | 13 | 14 | 14 | 14 | 16 | 18 | 21 | 18 | 16 | 16 | 14 | 13 | 11 | 11 | 11 | 11 |
| Wind Dir | NNW | NNW | NNW | NNW | NNW | NNW | NNW | NNW | NNW | NNW | NNW | NNW | N | N | N | N | N | NNW | NW | NW | NW | NW | NNW | NNW |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 25 | 17 | 30 | 25 | 29 | 27 | 36 | 45 | 54 | 54 | 54 | 54 | 56 | 57 | 59 | 66 | 73 | 80 | 68 | 57 | 45 | 33 | 22 | 10 |
| Precipitation Potential (%) | 0 | 0 | 0 | 2 | 2 | 2 | 1 | 1 | 10 | 10 | 10 | 3 | 5 | 9 | 33 | 33 | 33 | 6 | 6 | 2 | 0 | 0 | 0 | 0 |
| Relative Humidity (%) | 81 | 77 | 75 | 75 | 73 | 71 | 70 | 71 | 73 | 78 | 76 | 73 | 67 | 64 | 61 | 64 | 67 | 69 | 65 | 66 | 62 | 65 | 68 | 72 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | Chc | Chc | Chc | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Wave Height (m) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Wave Period (sec) | 2 | 2 | 2 | 2 | 2 | 3 | 3 | 3 | 3 | 3 | 4 | 4 | 4 | 5 | 5 | 6 | 6 | 6 | 5 | 5 | 5 | 5 | 5 | 5 |
| Wave Direction (°) | 340 | 340 | 350 | 350 | 150 | 150 | 10 | 10 | 20 | 20 | 20 | 20 | 20 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 |
| Date | 09/14 | |||||||||||||||||||||||
| Hour (CDT) | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 |
| Temperature (°C) | 17 | 16 | 16 | 15 | 15 | 14 | 14 | 14 | 14 | 16 | 17 | 18 | 18 | 18 | 18 | 18 | 19 | 19 | 21 | 21 | 22 | 22 | 21 | 20 |
| Dewpoint (°C) | 12 | 12 | 12 | 12 | 11 | 11 | 11 | 11 | 12 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 14 | 14 | 14 | 14 | 14 | 14 |
| Heat Index (°C) | ||||||||||||||||||||||||
| Surface Wind (km/h) | 11 | 11 | 11 | 11 | 10 | 11 | 11 | 11 | 13 | 13 | 16 | 18 | 21 | 23 | 23 | 23 | 23 | 23 | 24 | 26 | 27 | 29 | 32 | 34 |
| Wind Dir | NNW | NNW | N | NNW | N | N | N | NNE | NE | ESE | ESE | ESE | ESE | SE | SE | SE | SE | SE | SE | SE | SE | SSE | SSE | SSE |
| Gust | 34 | 37 | 39 | 42 | 45 | |||||||||||||||||||
| Sky Cover (%) | 7 | 2 | 5 | 5 | 8 | 3 | 1 | 15 | 19 | 14 | 21 | 27 | 30 | 32 | 35 | 43 | 50 | 58 | 61 | 64 | 67 | 61 | 55 | 49 |
| Precipitation Potential (%) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 |
| Relative Humidity (%) | 74 | 75 | 78 | 79 | 80 | 80 | 80 | 81 | 82 | 81 | 78 | 74 | 73 | 73 | 72 | 71 | 70 | 68 | 67 | 66 | 66 | 65 | 66 | 68 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Wave Height (m) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Wave Period (sec) | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 3 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 5 | 5 | 6 |
| Wave Direction (°) | 30 | 30 | 20 | 20 | 20 | 20 | 20 | 20 | 30 | 30 | 50 | 70 | 80 | 80 | 90 | 90 | 100 | 100 | 100 | 110 | 110 | 110 | 110 | 110 |
