| Point Forecast: Oak Brook IL 41.82N 87.94W |
Last Update: 1:10 pm CDT Aug 13, 2026 |
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| Date | 08/13 | 08/14 | ||||||||||||||||||||||
| 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) | 79 | 78 | 76 | 74 | 74 | 74 | 73 | 72 | 72 | 71 | 71 | 71 | 70 | 70 | 70 | 69 | 69 | 69 | 70 | 71 | 73 | 75 | 77 | 78 |
| Dewpoint (°F) | 71 | 70 | 70 | 70 | 70 | 69 | 69 | 69 | 69 | 69 | 69 | 69 | 68 | 68 | 68 | 68 | 68 | 68 | 69 | 70 | 71 | 71 | 72 | 72 |
| Heat Index (°F) | 82 | 78 | 76 | 75 | 77 | 78 | ||||||||||||||||||
| Surface Wind (mph) | 6 | 6 | 7 | 8 | 9 | 8 | 7 | 7 | 8 | 8 | 8 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 8 | 8 | 8 | 8 |
| Wind Dir | W | WSW | SW | NW | NE | NE | NE | ENE | E | E | SE | ESE | E | E | E | E | E | E | E | E | ENE | E | E | E |
| Gust | 13 | 13 | 13 | 13 | 13 | 14 | 14 | 14 | ||||||||||||||||
| Sky Cover (%) | 89 | 95 | 97 | 100 | 97 | 94 | 87 | 80 | 80 | 81 | 81 | 89 | 96 | 96 | 95 | 95 | 94 | 91 | 87 | 80 | 86 | 87 | 86 | 88 |
| Precipitation Potential (%) | 44 | 69 | 92 | 79 | 71 | 64 | 56 | 62 | 72 | 65 | 59 | 62 | 65 | 63 | 62 | 61 | 59 | 62 | 64 | 64 | 64 | 36 | 36 | 36 |
| Relative Humidity (%) | 75 | 79 | 84 | 87 | 86 | 86 | 88 | 89 | 91 | 93 | 94 | 93 | 93 | 94 | 94 | 94 | 97 | 99 | 97 | 95 | 92 | 88 | 85 | 83 |
| Rain | Chc | Lkly | Ocnl | Ocnl | Lkly | Lkly | Lkly | Lkly | Lkly | Lkly | Lkly | Lkly | Lkly | Lkly | Lkly | Lkly | Lkly | Lkly | Lkly | Lkly | Lkly | Chc | Chc | Chc |
| Thunder | SChc | SChc | SChc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | SChc | SChc | SChc | SChc | SChc | SChc |
| Date | 08/15 | |||||||||||||||||||||||
| 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 | 78 | 78 | 79 | 79 | 78 | 76 | 75 | 74 | 73 | 73 | 72 | 72 | 72 | 71 | 71 | 70 | 70 | 71 | 72 | 74 | 76 | 77 | 79 |
| Dewpoint (°F) | 72 | 72 | 72 | 72 | 72 | 72 | 70 | 70 | 70 | 70 | 70 | 70 | 70 | 70 | 70 | 70 | 70 | 70 | 70 | 71 | 72 | 74 | 74 | 75 |
| Heat Index (°F) | 78 | 78 | 78 | 79 | 82 | 78 | 77 | 75 | 76 | 77 | 79 | |||||||||||||
| Surface Wind (mph) | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 8 | 8 | 8 | 7 | 7 | 7 | 8 | 8 | 8 | 9 | 9 | 9 | 10 | 10 | 10 | 10 |
| Wind Dir | E | E | ENE | ENE | ENE | ENE | ENE | ENE | E | E | E | E | E | ESE | ESE | ESE | ESE | SE | SE | SE | SSE | SSE | SSE | S |
| Gust | 15 | 15 | 15 | 15 | 14 | 14 | 14 | 14 | 14 | 13 | 13 | 13 | 13 | 13 | 14 | 14 | 15 | 15 | 16 | 16 | 16 | |||
| Sky Cover (%) | 86 | 85 | 86 | 86 | 85 | 79 | 75 | 73 | 71 | 69 | 69 | 68 | 68 | 71 | 73 | 76 | 77 | 79 | 80 | 81 | 83 | 84 | 83 | 81 |
| Precipitation Potential (%) | 18 | 18 | 18 | 28 | 28 | 28 | 48 | 48 | 48 | 48 | 48 | 48 | 64 | 64 | 64 | 64 | 64 | 64 | 67 | 67 | 67 | 67 | 67 | 67 |
| Relative Humidity (%) | 81 | 82 | 81 | 79 | 79 | 80 | 81 | 84 | 86 | 89 | 91 | 92 | 94 | 95 | 96 | 97 | 98 | 98 | 97 | 96 | 95 | 93 | 91 | 89 |
| Rain | SChc | SChc | SChc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Lkly | Lkly | Lkly | Lkly | Lkly | Lkly | Lkly | Lkly | Lkly | Lkly | Lkly | Lkly |
| Thunder | -- | -- | SChc | SChc | SChc | SChc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc |
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