| Point Forecast: Marengo IL 42.24N 88.62W |
Last Update: 1:11 am CDT Aug 15, 2026 |
 |
|
[show menu] |
| Date | 08/15 | 08/16 | ||||||||||||||||||||||
| Hour (CDT) | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 |
| Temperature (°F) | 69 | 68 | 69 | 68 | 69 | 69 | 70 | 72 | 73 | 73 | 75 | 76 | 76 | 78 | 79 | 80 | 80 | 80 | 79 | 76 | 74 | 72 | 72 | 73 |
| Dewpoint (°F) | 66 | 66 | 66 | 67 | 67 | 68 | 69 | 70 | 71 | 71 | 72 | 73 | 73 | 74 | 74 | 74 | 75 | 75 | 75 | 74 | 73 | 72 | 72 | 73 |
| Heat Index (°F) | 75 | 76 | 76 | 78 | 79 | 84 | 86 | 85 | 83 | 76 | ||||||||||||||
| Surface Wind (mph) | 7 | 7 | 6 | 6 | 5 | 6 | 6 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 6 | 6 | 6 | 6 | 5 | 5 | 5 | 5 | 5 | 5 |
| Wind Dir | E | E | ESE | ESE | SE | SE | SE | SE | SE | SSE | SSE | SSE | S | SSW | SSW | SSW | SW | WSW | SW | SSW | SSW | SSW | SSW | SSW |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 85 | 84 | 90 | 95 | 94 | 95 | 94 | 95 | 97 | 97 | 95 | 90 | 85 | 80 | 74 | 66 | 62 | 60 | 57 | 53 | 55 | 55 | 60 | 61 |
| Precipitation Potential (%) | 25 | 31 | 37 | 45 | 52 | 58 | 63 | 66 | 68 | 48 | 26 | 23 | 20 | 18 | 16 | 16 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 23 |
| Relative Humidity (%) | 91 | 92 | 92 | 95 | 94 | 95 | 95 | 94 | 94 | 95 | 92 | 91 | 90 | 87 | 86 | 84 | 83 | 83 | 86 | 93 | 99 | 100 | 100 | 99 |
| Rain | Chc | Chc | Chc | Chc | Chc | Lkly | Lkly | Lkly | Lkly | Chc | Chc | SChc | SChc | SChc | SChc | SChc | SChc | SChc | SChc | SChc | SChc | SChc | SChc | SChc |
| Thunder | SChc | SChc | SChc | SChc | SChc | Chc | Chc | Chc | Chc | SChc | SChc | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | SChc |
| Date | 08/17 | |||||||||||||||||||||||
| Hour (CDT) | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 |
| Temperature (°F) | 72 | 71 | 71 | 72 | 72 | 71 | 72 | 73 | 75 | 77 | 79 | 81 | 82 | 82 | 82 | 82 | 81 | 80 | 78 | 75 | 73 | 71 | 69 | 68 |
| Dewpoint (°F) | 72 | 71 | 71 | 72 | 72 | 71 | 72 | 72 | 73 | 74 | 74 | 74 | 74 | 73 | 73 | 72 | 71 | 70 | 71 | 70 | 69 | 68 | 67 | 66 |
| Heat Index (°F) | 75 | 77 | 83 | 86 | 87 | 88 | 88 | 87 | 85 | 83 | 78 | 75 | ||||||||||||
| Surface Wind (mph) | 3 | 5 | 5 | 6 | 6 | 7 | 7 | 8 | 9 | 9 | 10 | 11 | 11 | 11 | 11 | 11 | 11 | 10 | 9 | 8 | 7 | 6 | 6 | 6 |
| Wind Dir | SW | WSW | WSW | WSW | W | W | W | W | WNW | WNW | WNW | NW | WNW | WNW | WNW | NW | NW | NW | NW | NW | NNW | NNW | NNW | NNW |
| Gust | 13 | 14 | 14 | 16 | 18 | 18 | 18 | 18 | 17 | 17 | 15 | |||||||||||||
| Sky Cover (%) | 73 | 76 | 84 | 86 | 89 | 86 | 84 | 82 | 73 | 77 | 75 | 63 | 61 | 55 | 45 | 48 | 42 | 49 | 40 | 40 | 34 | 24 | 18 | 18 |
| Precipitation Potential (%) | 31 | 33 | 34 | 34 | 35 | 30 | 25 | 14 | 2 | 2 | 1 | 1 | 0 | 5 | 9 | 5 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Relative Humidity (%) | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 98 | 93 | 88 | 83 | 80 | 77 | 74 | 72 | 71 | 71 | 73 | 81 | 84 | 88 | 90 | 91 | 92 |
| Rain | Chc | Chc | Chc | Chc | Chc | Chc | Chc | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | Chc | Chc | Chc | Chc | Chc | Chc | Chc | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| ||||||||||