| Point Forecast: Riverwoods IL 42.17N 87.89W |
Last Update: 1:11 pm CDT Jul 18, 2026 |
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| Date | 07/18 | 07/19 | ||||||||||||||||||||||
| Hour (CDT) | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 |
| Temperature (°F) | 81 | 83 | 83 | 82 | 79 | 78 | 77 | 74 | 73 | 71 | 70 | 70 | 69 | 69 | 68 | 68 | 67 | 68 | 69 | 72 | 74 | 75 | 76 | 77 |
| Dewpoint (°F) | 71 | 71 | 71 | 70 | 69 | 67 | 67 | 66 | 65 | 65 | 64 | 63 | 62 | 62 | 62 | 62 | 62 | 63 | 63 | 63 | 62 | 62 | 62 | 61 |
| Heat Index (°F) | 85 | 88 | 88 | 85 | 79 | 78 | 77 | 75 | 77 | 77 | ||||||||||||||
| Surface Wind (mph) | 13 | 11 | 11 | 11 | 11 | 10 | 10 | 10 | 10 | 10 | 9 | 9 | 8 | 7 | 7 | 6 | 6 | 6 | 6 | 7 | 7 | 8 | 8 | 8 |
| Wind Dir | NW | NW | N | NE | NE | NE | NE | NE | NNE | NNE | NNE | NE | NE | NE | NE | NE | NE | NE | NE | NE | NE | ENE | ENE | ENE |
| Gust | 20 | 18 | 18 | 18 | 18 | 16 | 16 | 15 | 15 | 15 | 15 | 14 | 13 | |||||||||||
| Sky Cover (%) | 69 | 63 | 56 | 42 | 28 | 26 | 27 | 28 | 23 | 24 | 30 | 37 | 44 | 42 | 40 | 38 | 35 | 35 | 35 | 35 | 35 | 35 | 35 | 33 |
| Precipitation Potential (%) | 46 | 41 | 28 | 14 | 9 | 4 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Relative Humidity (%) | 70 | 67 | 66 | 69 | 72 | 70 | 71 | 75 | 78 | 80 | 79 | 78 | 79 | 80 | 81 | 82 | 84 | 85 | 80 | 74 | 68 | 64 | 60 | 58 |
| Rain | Chc | Chc | Chc | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | Chc | Chc | Chc | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Date | 07/20 | |||||||||||||||||||||||
| Hour (CDT) | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 |
| Temperature (°F) | 78 | 79 | 79 | 79 | 78 | 78 | 76 | 74 | 71 | 69 | 68 | 67 | 66 | 65 | 65 | 64 | 64 | 65 | 67 | 71 | 75 | 79 | 81 | 83 |
| Dewpoint (°F) | 61 | 60 | 59 | 58 | 58 | 57 | 57 | 58 | 59 | 60 | 60 | 60 | 61 | 61 | 61 | 61 | 61 | 61 | 62 | 63 | 64 | 64 | 64 | 64 |
| Heat Index (°F) | 78 | 79 | 79 | 79 | 78 | 78 | 76 | 75 | 79 | 83 | 85 | |||||||||||||
| Surface Wind (mph) | 9 | 9 | 8 | 8 | 7 | 7 | 7 | 6 | 6 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 6 | 6 | 6 | 7 | 9 | 10 | 10 |
| Wind Dir | ENE | ENE | ENE | ENE | ENE | ENE | ENE | ENE | E | E | ESE | SSE | S | S | SSW | SSW | SSW | SSW | SSW | SSW | SSW | SSW | SSW | SSW |
| Gust | 15 | 16 | ||||||||||||||||||||||
| Sky Cover (%) | 30 | 30 | 25 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 28 | 32 | 36 | 40 | 48 | 50 | 50 |
| Precipitation Potential (%) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Relative Humidity (%) | 55 | 53 | 52 | 50 | 49 | 50 | 53 | 58 | 65 | 72 | 76 | 79 | 82 | 85 | 87 | 88 | 89 | 89 | 83 | 75 | 67 | 60 | 55 | 53 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
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