| Point Forecast: 3 Miles NNE Vienna IL 37.44N 88.88W |
Last Update: 5:16 pm CDT Aug 13, 2026 |
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| Date | 08/13 | 08/14 | ||||||||||||||||||||||
| Hour (CDT) | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 |
| Temperature (°C) | 29 | 28 | 27 | 27 | 27 | 26 | 26 | 26 | 25 | 25 | 25 | 24 | 27 | 28 | 31 | 33 | 34 | 34 | 36 | 36 | 36 | 35 | 34 | 33 |
| Dewpoint (°C) | 24 | 24 | 23 | 23 | 23 | 23 | 22 | 22 | 22 | 22 | 22 | 22 | 23 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 25 |
| Heat Index (°C) | 34 | 32 | 30 | 29 | 29 | 26 | 26 | 26 | 25 | 25 | 25 | 24 | 29 | 32 | 37 | 39 | 41 | 41 | 43 | 43 | 43 | 42 | 42 | 41 |
| Surface Wind (mph) | 3 | 3 | 3 | 3 | 2 | 2 | 2 | 2 | 3 | 3 | 3 | 3 | 5 | 5 | 6 | 7 | 7 | 7 | 7 | 7 | 7 | 6 | 5 | 3 |
| Wind Dir | S | S | S | S | S | S | S | S | S | S | SSW | SSW | SSW | SW | SW | SSW | SSW | SSW | SW | SSW | SSW | SSW | SSW | S |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 17 | 8 | 7 | 14 | 9 | 8 | 30 | 26 | 10 | 14 | 20 | 10 | 17 | 16 | 16 | 30 | 26 | 34 | 38 | 24 | 23 | 16 | 5 | 2 |
| Precipitation Potential (%) | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 3 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 0 |
| Relative Humidity (%) | 75 | 77 | 79 | 79 | 79 | 82 | 79 | 82 | 82 | 82 | 82 | 87 | 82 | 79 | 66 | 62 | 58 | 54 | 53 | 51 | 51 | 53 | 56 | 64 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Date | 08/15 | |||||||||||||||||||||||
| Hour (CDT) | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 |
| Temperature (°C) | 30 | 29 | 28 | 27 | 27 | 26 | 26 | 26 | 25 | 25 | 24 | 24 | 26 | 28 | 31 | 33 | 34 | 35 | 36 | 36 | 36 | 36 | 34 | 33 |
| Dewpoint (°C) | 24 | 24 | 23 | 23 | 22 | 22 | 22 | 21 | 21 | 21 | 20 | 21 | 22 | 23 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 23 | 23 | 23 |
| Heat Index (°C) | 36 | 33 | 31 | 30 | 29 | 26 | 26 | 26 | 25 | 25 | 24 | 24 | 26 | 32 | 35 | 37 | 39 | 40 | 41 | 41 | 41 | 41 | 41 | 38 |
| Surface Wind (mph) | 3 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 3 | 5 | 5 | 5 | 6 | 6 | 7 | 7 | 7 | 6 | 5 | 3 |
| Wind Dir | S | S | S | S | S | SSW | SSW | SSW | SSW | SSW | SSW | SSW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SSW | SSW | S |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 0 | 0 | 0 | 0 | 1 | 4 | 2 | 1 | 0 | 0 | 1 | 9 | 0 | 6 | 11 | 9 | 7 | 5 | 5 | 4 | 4 | 5 | 5 | 6 |
| Precipitation Potential (%) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Relative Humidity (%) | 72 | 74 | 77 | 77 | 77 | 79 | 77 | 76 | 76 | 76 | 76 | 82 | 79 | 72 | 59 | 54 | 49 | 48 | 45 | 45 | 45 | 48 | 53 | 58 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
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