| Point Forecast: Clarendon Hills IL 41.8N 87.94W |
Last Update: 2:46 pm CDT Aug 17, 2026 |
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| Date | 08/17 | 08/18 | ||||||||||||||||||||||
| Hour (CDT) | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 |
| Temperature (°F) | 75 | 76 | 77 | 77 | 76 | 75 | 73 | 71 | 70 | 69 | 68 | 67 | 66 | 66 | 65 | 64 | 65 | 66 | 68 | 72 | 75 | 77 | 78 | 78 |
| Dewpoint (°F) | 65 | 64 | 63 | 63 | 64 | 63 | 63 | 62 | 62 | 63 | 62 | 63 | 62 | 62 | 62 | 62 | 61 | 62 | 64 | 65 | 66 | 66 | 67 | 67 |
| Heat Index (°F) | 75 | 76 | 77 | 77 | 76 | 75 | 75 | 77 | 78 | 78 | ||||||||||||||
| Surface Wind (mph) | 8 | 7 | 7 | 7 | 6 | 3 | 3 | 2 | 3 | 3 | 3 | 5 | 5 | 5 | 5 | 5 | 5 | 6 | 6 | 6 | 7 | 9 | 10 | 11 |
| Wind Dir | N | N | N | N | N | E | SE | SE | S | SSW | SW | SW | SW | WSW | WSW | WSW | WSW | WSW | WSW | WSW | WSW | WSW | WSW | WSW |
| Gust | 13 | 13 | 13 | 13 | 15 | 17 | 18 | |||||||||||||||||
| Sky Cover (%) | 42 | 42 | 43 | 34 | 25 | 21 | 14 | 15 | 15 | 12 | 14 | 22 | 30 | 32 | 37 | 35 | 33 | 31 | 45 | 56 | 48 | 66 | 74 | 87 |
| Precipitation Potential (%) | 20 | 20 | 15 | 12 | 10 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 2 | 3 | 3 | 3 | 2 | 4 | 5 |
| Relative Humidity (%) | 70 | 66 | 63 | 61 | 66 | 66 | 71 | 73 | 77 | 80 | 82 | 84 | 87 | 88 | 88 | 91 | 89 | 89 | 86 | 79 | 74 | 71 | 68 | 68 |
| Rain | SChc | SChc | SChc | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Date | 08/19 | |||||||||||||||||||||||
| Hour (CDT) | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 |
| Temperature (°F) | 79 | 78 | 78 | 78 | 76 | 75 | 74 | 73 | 72 | 72 | 71 | 71 | 70 | 69 | 69 | 68 | 67 | 68 | 70 | 71 | 73 | 75 | 75 | 76 |
| Dewpoint (°F) | 67 | 68 | 68 | 68 | 68 | 68 | 68 | 68 | 68 | 68 | 68 | 68 | 67 | 67 | 66 | 66 | 65 | 66 | 66 | 67 | 66 | 66 | 66 | 65 |
| Heat Index (°F) | 82 | 78 | 78 | 78 | 76 | 75 | 75 | 75 | 76 | |||||||||||||||
| Surface Wind (mph) | 11 | 11 | 10 | 10 | 10 | 9 | 8 | 8 | 7 | 7 | 7 | 6 | 6 | 6 | 5 | 5 | 3 | 3 | 5 | 5 | 5 | 5 | 5 | 5 |
| Wind Dir | WSW | WSW | WSW | WSW | SW | SW | SW | WSW | SW | WSW | WSW | W | W | WNW | WNW | NW | NW | NW | NNW | NNW | NNW | NNW | N | N |
| Gust | 18 | 20 | 18 | 17 | 15 | 14 | 13 | |||||||||||||||||
| Sky Cover (%) | 80 | 67 | 78 | 67 | 73 | 74 | 65 | 51 | 71 | 70 | 68 | 59 | 67 | 66 | 52 | 61 | 58 | 44 | 54 | 54 | 54 | 53 | 51 | 49 |
| Precipitation Potential (%) | 6 | 13 | 23 | 25 | 28 | 64 | 64 | 64 | 64 | 64 | 64 | 35 | 35 | 35 | 35 | 35 | 35 | 6 | 6 | 6 | 6 | 6 | 6 | 6 |
| Relative Humidity (%) | 66 | 70 | 70 | 72 | 77 | 79 | 82 | 84 | 87 | 87 | 90 | 90 | 90 | 93 | 90 | 93 | 93 | 93 | 87 | 87 | 79 | 74 | 74 | 69 |
| Rain | -- | -- | SChc | Chc | Chc | Lkly | Lkly | Lkly | Lkly | Lkly | Lkly | Chc | Chc | Chc | Chc | Chc | Chc | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | SChc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
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