| Point Forecast: Mattoon/Charleston, Coles County Memorial Airport IL 39.49N 88.27W (Elev. 212 m) |
Last Update: 12:36 pm CDT May 9, 2026 |
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| Date | 05/09 | 05/10 | ||||||||||||||||||||||
| Hour (CDT) | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 |
| Temperature (°C) | 18 | 21 | 23 | 23 | 23 | 23 | 23 | 22 | 19 | 17 | 17 | 16 | 15 | 16 | 15 | 13 | 13 | 13 | 12 | 13 | 13 | 14 | 16 | 17 |
| Dewpoint (°C) | 13 | 12 | 11 | 11 | 10 | 10 | 10 | 11 | 11 | 11 | 10 | 10 | 9 | 10 | 9 | 9 | 8 | 8 | 7 | 7 | 7 | 7 | 6 | 6 |
| Heat Index (°C) | ||||||||||||||||||||||||
| Surface Wind (mph) | 14 | 15 | 15 | 15 | 14 | 13 | 10 | 8 | 7 | 6 | 6 | 6 | 6 | 8 | 8 | 8 | 7 | 7 | 7 | 8 | 8 | 8 | 9 | 10 |
| Wind Dir | WSW | WSW | WSW | W | W | W | W | WSW | WSW | SW | SW | W | NW | NNW | N | N | N | NNE | N | N | N | N | N | N |
| Gust | 26 | 31 | 32 | 31 | 29 | 24 | ||||||||||||||||||
| Sky Cover (%) | 14 | 7 | 5 | 4 | 5 | 7 | 6 | 11 | 26 | 26 | 54 | 64 | 73 | 88 | 91 | 79 | 68 | 60 | 56 | 50 | 49 | 48 | 47 | 54 |
| Precipitation Potential (%) | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 11 | 12 | 20 | 26 | 34 | 20 | 20 | 18 | 13 | 5 | 8 | 3 | 3 | 1 |
| Relative Humidity (%) | 70 | 57 | 48 | 44 | 43 | 43 | 44 | 49 | 58 | 65 | 65 | 69 | 69 | 69 | 69 | 74 | 74 | 72 | 71 | 69 | 69 | 62 | 51 | 48 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | SChc | Chc | Chc | SChc | SChc | SChc | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Date | 05/11 | |||||||||||||||||||||||
| Hour (CDT) | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 |
| Temperature (°C) | 17 | 18 | 18 | 18 | 18 | 17 | 17 | 16 | 14 | 12 | 12 | 11 | 9 | 8 | 8 | 7 | 7 | 6 | 6 | 7 | 9 | 12 | 15 | 17 |
| Dewpoint (°C) | 6 | 4 | 4 | 4 | 3 | 3 | 3 | 3 | 3 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 3 | 3 | 3 | 3 |
| Heat Index (°C) | ||||||||||||||||||||||||
| Surface Wind (mph) | 10 | 11 | 11 | 11 | 11 | 11 | 10 | 9 | 7 | 7 | 8 | 8 | 7 | 6 | 5 | 5 | 3 | 3 | 3 | 3 | 3 | 3 | 5 | 6 |
| Wind Dir | N | NNW | NNW | NNW | NNW | NNW | N | N | NNW | N | N | N | N | NNE | NNE | NNE | NNE | NNE | N | N | N | N | N | N |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 61 | 68 | 63 | 59 | 55 | 50 | 45 | 41 | 56 | 43 | 29 | 24 | 19 | 14 | 12 | 11 | 9 | 9 | 8 | 8 | 6 | 3 | 1 | 4 |
| Precipitation Potential (%) | 2 | 7 | 4 | 1 | 1 | 2 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Relative Humidity (%) | 48 | 41 | 40 | 40 | 37 | 38 | 38 | 42 | 47 | 50 | 50 | 52 | 56 | 60 | 63 | 65 | 68 | 73 | 73 | 70 | 63 | 55 | 45 | 41 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
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