| Point Forecast: Riverwoods IL 42.17N 87.89W |
Last Update: 2:46 pm CDT Aug 17, 2026 |
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| Date | 08/17 | 08/18 | ||||||||||||||||||||||
| Hour (CDT) | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 |
| Temperature (°F) | 77 | 77 | 77 | 76 | 74 | 72 | 70 | 69 | 68 | 67 | 66 | 65 | 65 | 64 | 63 | 64 | 65 | 68 | 73 | 76 | 78 | 79 | 80 | 80 |
| Dewpoint (°F) | 63 | 63 | 63 | 63 | 63 | 63 | 63 | 63 | 62 | 62 | 62 | 62 | 62 | 61 | 61 | 61 | 62 | 64 | 65 | 66 | 66 | 66 | 66 | 67 |
| Heat Index (°F) | 77 | 77 | 77 | 76 | 76 | 78 | 79 | 82 | 83 | |||||||||||||||
| Surface Wind (mph) | 7 | 7 | 7 | 5 | 3 | 3 | 3 | 3 | 3 | 3 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 6 | 7 | 8 | 10 | 11 | 11 | 11 |
| Wind Dir | N | NNE | NNE | NE | ENE | ESE | S | SSW | SSW | SW | SW | WSW | WSW | WSW | WSW | WSW | WSW | WSW | WSW | WSW | WSW | WSW | WSW | WSW |
| Gust | 14 | 16 | 18 | 20 | 20 | |||||||||||||||||||
| Sky Cover (%) | 35 | 29 | 24 | 19 | 21 | 15 | 12 | 8 | 8 | 13 | 22 | 38 | 25 | 27 | 29 | 28 | 22 | 43 | 43 | 49 | 64 | 69 | 84 | 78 |
| Precipitation Potential (%) | 17 | 12 | 9 | 7 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 2 | 3 | 3 | 3 | 3 | 3 | 7 | 11 |
| Relative Humidity (%) | 64 | 62 | 62 | 64 | 69 | 73 | 78 | 81 | 83 | 85 | 86 | 90 | 90 | 90 | 93 | 90 | 90 | 86 | 76 | 71 | 66 | 65 | 64 | 65 |
| Rain | SChc | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Date | 08/19 | |||||||||||||||||||||||
| Hour (CDT) | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 |
| Temperature (°F) | 79 | 78 | 78 | 75 | 74 | 73 | 72 | 71 | 70 | 69 | 69 | 68 | 67 | 67 | 66 | 65 | 67 | 69 | 71 | 74 | 75 | 75 | 75 | 76 |
| Dewpoint (°F) | 68 | 68 | 69 | 68 | 68 | 68 | 68 | 68 | 67 | 67 | 67 | 67 | 66 | 65 | 65 | 64 | 65 | 66 | 66 | 66 | 66 | 65 | 64 | 64 |
| Heat Index (°F) | 79 | 78 | 78 | 75 | 75 | 75 | 75 | 76 | ||||||||||||||||
| Surface Wind (mph) | 11 | 10 | 10 | 9 | 8 | 7 | 6 | 6 | 6 | 5 | 5 | 5 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 5 | 5 | 5 | 5 | 6 |
| Wind Dir | W | WSW | WSW | WSW | WSW | SW | WSW | WSW | W | W | W | WNW | WNW | WNW | NW | NW | NW | NNW | NNW | NNW | N | N | NNE | NNE |
| Gust | 20 | 18 | 16 | 15 | 13 | |||||||||||||||||||
| Sky Cover (%) | 64 | 67 | 66 | 77 | 75 | 67 | 55 | 62 | 65 | 67 | 59 | 54 | 55 | 42 | 49 | 50 | 36 | 47 | 49 | 50 | 49 | 48 | 46 | 45 |
| Precipitation Potential (%) | 25 | 31 | 37 | 40 | 64 | 64 | 64 | 64 | 64 | 64 | 29 | 29 | 29 | 29 | 29 | 29 | 4 | 4 | 4 | 4 | 4 | 4 | 3 | 3 |
| Relative Humidity (%) | 68 | 71 | 74 | 78 | 82 | 84 | 87 | 90 | 90 | 93 | 93 | 97 | 97 | 93 | 97 | 97 | 93 | 90 | 84 | 76 | 74 | 71 | 69 | 66 |
| Rain | Chc | Chc | Chc | Chc | Lkly | Lkly | Lkly | Lkly | Lkly | Lkly | Chc | Chc | Chc | Chc | Chc | Chc | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | SChc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
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