| Point Forecast: Marengo IL 42.24N 88.62W |
Last Update: 9:07 pm CDT Jul 15, 2025 |
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| Date | 07/15 | 07/16 | ||||||||||||||||||||||
| Hour (CDT) | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 |
| Temperature (°C) | 27 | 24 | 23 | 23 | 23 | 22 | 22 | 22 | 22 | 23 | 23 | 24 | 26 | 27 | 28 | 29 | 31 | 31 | 31 | 31 | 29 | 28 | 26 | 25 |
| Dewpoint (°C) | 23 | 22 | 21 | 21 | 21 | 21 | 21 | 21 | 22 | 22 | 22 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 22 | 22 |
| Heat Index (°C) | 29 | 24 | 24 | 26 | 29 | 32 | 33 | 35 | 36 | 36 | 36 | 34 | 31 | 26 | 25 | |||||||||
| Surface Wind (mph) | 5 | 3 | 3 | 2 | 2 | 2 | 2 | 2 | 2 | 3 | 3 | 5 | 5 | 6 | 8 | 9 | 11 | 13 | 14 | 14 | 13 | 13 | 11 | 11 |
| Wind Dir | SSE | SE | SSE | SSE | SSE | S | S | S | S | SSW | SSW | SSW | SSW | SSW | SSW | SSW | SSW | SSW | SSW | SSW | SSW | SW | SW | WSW |
| Gust | 21 | 22 | ||||||||||||||||||||||
| Sky Cover (%) | 40 | 40 | 39 | 39 | 39 | 43 | 47 | 51 | 52 | 53 | 53 | 51 | 49 | 48 | 49 | 50 | 51 | 52 | 53 | 53 | 57 | 60 | 63 | 63 |
| Precipitation Potential (%) | 12 | 13 | 15 | 14 | 13 | 8 | 4 | 4 | 4 | 6 | 8 | 8 | 8 | 6 | 6 | 6 | 33 | 33 | 33 | 60 | 60 | 60 | 64 | 64 |
| Relative Humidity (%) | 82 | 89 | 88 | 89 | 89 | 92 | 94 | 95 | 96 | 95 | 94 | 91 | 88 | 84 | 77 | 70 | 66 | 64 | 63 | 65 | 69 | 74 | 81 | 85 |
| Rain | -- | -- | SChc | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | Chc | Chc | Chc | Lkly | Lkly | Lkly | Lkly | Lkly |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | Chc | Chc | Chc | Lkly | Lkly | Lkly | Lkly | Lkly |
| Date | 07/17 | |||||||||||||||||||||||
| Hour (CDT) | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 |
| Temperature (°C) | 24 | 23 | 23 | 22 | 22 | 22 | 21 | 21 | 20 | 19 | 19 | 18 | 18 | 19 | 19 | 21 | 22 | 22 | 22 | 22 | 22 | 22 | 21 | 19 |
| Dewpoint (°C) | 22 | 22 | 22 | 22 | 21 | 21 | 21 | 20 | 19 | 19 | 19 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 17 | 17 | 16 | 16 |
| Heat Index (°C) | 24 | |||||||||||||||||||||||
| Surface Wind (mph) | 10 | 9 | 8 | 7 | 6 | 6 | 6 | 7 | 7 | 8 | 8 | 8 | 9 | 9 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 9 | 8 | 7 |
| Wind Dir | W | W | W | WSW | WSW | W | W | WNW | WNW | NW | NW | NW | NNW | NNW | NNW | N | N | N | N | NNE | NNE | NE | NE | NE |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 63 | 63 | 48 | 60 | 72 | 78 | 83 | 89 | 86 | 83 | 83 | 84 | 85 | 86 | 85 | 84 | 83 | 80 | 78 | 75 | 76 | 76 | 76 | 68 |
| Precipitation Potential (%) | 64 | 64 | 64 | 64 | 34 | 34 | 34 | 34 | 34 | 34 | 20 | 20 | 20 | 20 | 20 | 20 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 |
| Relative Humidity (%) | 89 | 94 | 96 | 97 | 96 | 96 | 96 | 97 | 97 | 97 | 100 | 100 | 100 | 98 | 93 | 88 | 82 | 79 | 77 | 75 | 74 | 74 | 75 | 77 |
| Rain | Lkly | Lkly | Lkly | Lkly | Chc | Chc | Chc | Chc | Chc | Chc | SChc | SChc | SChc | SChc | SChc | SChc | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | Lkly | Lkly | Lkly | Lkly | SChc | SChc | SChc | SChc | SChc | SChc | SChc | SChc | SChc | SChc | SChc | SChc | -- | -- | -- | -- | -- | -- | -- | -- |
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