| Point Forecast: Park Forest IL 41.46N 87.71W |
Last Update: 2:51 pm CDT Aug 15, 2026 |
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| Date | 08/15 | 08/16 | ||||||||||||||||||||||
| Hour (CDT) | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 |
| Temperature (°F) | 78 | 78 | 78 | 77 | 76 | 75 | 75 | 74 | 74 | 74 | 74 | 74 | 73 | 72 | 72 | 72 | 72 | 74 | 76 | 78 | 80 | 82 | 84 | 85 |
| Dewpoint (°F) | 73 | 74 | 74 | 74 | 74 | 73 | 72 | 72 | 72 | 72 | 72 | 72 | 72 | 72 | 72 | 72 | 72 | 74 | 76 | 76 | 76 | 76 | 76 | 76 |
| Heat Index (°F) | 78 | 78 | 78 | 77 | 76 | 75 | 75 | 76 | 78 | 86 | 90 | 92 | 93 | |||||||||||
| Surface Wind (mph) | 7 | 6 | 5 | 5 | 5 | 3 | 5 | 5 | 5 | 5 | 7 | 6 | 5 | 5 | 6 | 6 | 7 | 8 | 8 | 9 | 10 | 10 | 10 | 10 |
| Wind Dir | SW | SW | SW | SW | SSW | S | S | SSW | SSW | SSW | SW | SW | SW | WSW | WSW | WSW | W | W | W | W | W | WNW | WNW | WNW |
| Gust | 14 | 14 | 11 | 11 | 13 | 14 | 14 | 16 | 16 | 16 | 17 | 16 | ||||||||||||
| Sky Cover (%) | 77 | 71 | 52 | 57 | 57 | 51 | 59 | 65 | 84 | 87 | 76 | 84 | 87 | 81 | 88 | 84 | 83 | 92 | 88 | 91 | 72 | 79 | 69 | 61 |
| Precipitation Potential (%) | 26 | 26 | 26 | 22 | 18 | 20 | 22 | 25 | 42 | 55 | 60 | 57 | 57 | 55 | 46 | 39 | 30 | 21 | 16 | 10 | 10 | 17 | 23 | 26 |
| Relative Humidity (%) | 87 | 87 | 88 | 91 | 94 | 93 | 93 | 93 | 94 | 95 | 93 | 93 | 95 | 98 | 100 | 100 | 100 | 100 | 99 | 92 | 85 | 80 | 76 | 74 |
| Rain | Chc | Chc | Chc | SChc | SChc | SChc | SChc | Chc | Chc | Lkly | Lkly | Lkly | Lkly | Lkly | Chc | Chc | Chc | SChc | SChc | -- | -- | SChc | SChc | Chc |
| Thunder | -- | SChc | SChc | SChc | SChc | SChc | SChc | SChc | SChc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | SChc | -- | -- | -- | SChc | SChc | SChc |
| Date | 08/17 | |||||||||||||||||||||||
| Hour (CDT) | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 |
| Temperature (°F) | 84 | 83 | 82 | 80 | 77 | 75 | 74 | 72 | 72 | 71 | 70 | 68 | 67 | 67 | 66 | 67 | 69 | 72 | 74 | 76 | 77 | 78 | 79 | 79 |
| Dewpoint (°F) | 75 | 74 | 74 | 74 | 73 | 71 | 70 | 70 | 69 | 69 | 68 | 67 | 67 | 66 | 66 | 66 | 68 | 68 | 68 | 68 | 67 | 67 | 66 | 66 |
| Heat Index (°F) | 92 | 91 | 88 | 84 | 77 | 75 | 76 | 77 | 78 | 79 | 81 | |||||||||||||
| Surface Wind (mph) | 10 | 9 | 9 | 8 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 6 | 6 | 6 | 6 | 5 | 6 | 6 | 6 | 6 | 6 | 6 | 6 |
| Wind Dir | WNW | WNW | WNW | NW | NW | NW | NNW | NNW | NNW | NNW | NNW | N | N | N | N | N | N | N | N | N | N | N | N | N |
| Gust | 16 | 15 | 14 | |||||||||||||||||||||
| Sky Cover (%) | 63 | 46 | 44 | 40 | 40 | 33 | 51 | 35 | 40 | 52 | 45 | 62 | 57 | 45 | 47 | 44 | 14 | 21 | 28 | 26 | 25 | 23 | 25 | 27 |
| Precipitation Potential (%) | 25 | 25 | 24 | 17 | 11 | 11 | 11 | 11 | 8 | 5 | 1 | 7 | 11 | 12 | 8 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 |
| Relative Humidity (%) | 73 | 74 | 78 | 82 | 86 | 87 | 90 | 91 | 92 | 93 | 93 | 96 | 98 | 98 | 98 | 97 | 95 | 89 | 82 | 76 | 71 | 67 | 65 | 63 |
| Rain | Chc | Chc | SChc | SChc | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | SChc | SChc | SChc | SChc | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
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