| Point Forecast: 3 Miles ENE Mount Vernon IL 38.33N 88.86W |
Last Update: 4:16 pm CDT May 13, 2026 |
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| Date | 05/13 | 05/14 | ||||||||||||||||||||||
| Hour (CDT) | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 |
| Temperature (°C) | 21 | 21 | 19 | 16 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 8 | 8 | 9 | 11 | 13 | 17 | 18 | 19 | 21 | 22 | 22 | 22 | 23 |
| Dewpoint (°C) | 7 | 6 | 7 | 7 | 6 | 6 | 6 | 5 | 5 | 5 | 5 | 5 | 5 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 |
| Heat Index (°C) | ||||||||||||||||||||||||
| Surface Wind (mph) | 8 | 8 | 7 | 5 | 3 | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 3 | 3 | 1 | 2 | 2 | 1 | 2 | 2 |
| Wind Dir | NNW | NNW | N | N | N | N | NNE | NNE | N | N | NE | N | N | N | N | E | E | ENE | E | E | E | SSE | SSE | SE |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 7 | 6 | 3 | 0 | 1 | 1 | 1 | 2 | 1 | 3 | 3 | 2 | 2 | 2 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 9 | 7 | 7 |
| 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 (%) | 39 | 39 | 45 | 58 | 57 | 64 | 66 | 68 | 71 | 77 | 79 | 79 | 83 | 80 | 69 | 59 | 48 | 45 | 42 | 39 | 36 | 36 | 36 | 34 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Date | 05/15 | |||||||||||||||||||||||
| Hour (CDT) | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 |
| Temperature (°C) | 22 | 21 | 19 | 16 | 14 | 14 | 13 | 13 | 13 | 12 | 12 | 12 | 12 | 13 | 14 | 16 | 18 | 20 | 22 | 23 | 25 | 26 | 27 | 27 |
| Dewpoint (°C) | 7 | 7 | 7 | 6 | 6 | 6 | 6 | 5 | 5 | 5 | 5 | 6 | 6 | 7 | 8 | 9 | 9 | 11 | 11 | 12 | 13 | 13 | 14 | 14 |
| Heat Index (°C) | 25 | 26 | 27 | 27 | ||||||||||||||||||||
| Surface Wind (mph) | 2 | 0 | 0 | 1 | 2 | 2 | 3 | 3 | 5 | 5 | 6 | 7 | 7 | 8 | 9 | 10 | 11 | 13 | 14 | 15 | 16 | 16 | 15 | 14 |
| Wind Dir | SSE | SSE | SE | SE | SE | SE | SE | SE | SSE | SSE | SSE | SSE | SSE | SSE | SSE | S | S | S | S | S | S | S | S | S |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 15 | 7 | 17 | 18 | 21 | 15 | 15 | 26 | 29 | 22 | 50 | 47 | 54 | 52 | 64 | 66 | 67 | 66 | 64 | 63 | 56 | 50 | 43 | 39 |
| Precipitation Potential (%) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 4 | 4 | 4 | 4 | 4 | 4 | 38 | 38 | 38 | 38 | 38 | 38 | 6 | 6 | 6 | 6 | 6 |
| Relative Humidity (%) | 38 | 41 | 45 | 51 | 55 | 57 | 59 | 59 | 59 | 61 | 61 | 64 | 69 | 66 | 64 | 62 | 56 | 55 | 49 | 50 | 47 | 45 | 44 | 46 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | Chc | Chc | Chc | Chc | Chc | Chc | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | Chc | Chc | Chc | SChc | SChc | SChc | -- | -- | -- | -- | -- |
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