| Point Forecast: Decatur Airport IL 39.84N 88.88W (Elev. 650 ft) |
Last Update: 7:47 pm CDT May 8, 2024 |
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| Date | 05/08 | 05/09 | ||||||||||||||||||||||
| 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 (°F) | 62 | 61 | 62 | 64 | 63 | 63 | 63 | 62 | 62 | 62 | 61 | 62 | 63 | 64 | 64 | 64 | 64 | 63 | 64 | 61 | 61 | 60 | 57 | 55 |
| Dewpoint (°F) | 62 | 61 | 62 | 61 | 61 | 61 | 60 | 60 | 60 | 59 | 59 | 59 | 58 | 58 | 57 | 56 | 55 | 54 | 53 | 52 | 52 | 51 | 51 | 50 |
| Heat Index (°F) | ||||||||||||||||||||||||
| Surface Wind (mph) | 13 | 13 | 11 | 10 | 9 | 9 | 9 | 10 | 10 | 11 | 11 | 13 | 14 | 15 | 16 | 16 | 17 | 18 | 18 | 18 | 17 | 16 | 14 | 13 |
| Wind Dir | SE | SE | SE | SSE | SSE | S | S | SSW | SW | WSW | W | W | W | W | W | WNW | WNW | NW | NW | NW | NNW | NNW | N | N |
| Gust | 20 | 20 | 20 | 18 | 18 | 17 | 17 | 16 | 16 | 17 | 17 | 18 | 20 | 21 | 23 | 24 | 26 | 26 | 26 | 26 | 25 | 24 | 23 | 21 |
| Sky Cover (%) | 84 | 84 | 82 | 80 | 79 | 77 | 76 | 75 | 75 | 75 | 75 | 75 | 76 | 76 | 74 | 73 | 71 | 71 | 70 | 70 | 68 | 65 | 63 | 61 |
| Precipitation Potential (%) | 61 | 49 | 37 | 32 | 27 | 24 | 20 | 16 | 13 | 9 | 6 | 10 | 15 | 19 | 23 | 28 | 32 | 32 | 32 | 32 | 28 | 19 | 15 | 15 |
| Relative Humidity (%) | 100 | 100 | 100 | 90 | 93 | 93 | 90 | 93 | 93 | 90 | 93 | 90 | 84 | 81 | 84 | 75 | 73 | 72 | 67 | 72 | 72 | 72 | 80 | 83 |
| Rain | Lkly | Chc | Chc | Chc | Chc | SChc | SChc | SChc | -- | -- | -- | -- | SChc | SChc | SChc | Chc | Chc | Chc | Chc | Chc | Chc | SChc | -- | -- |
| Thunder | Lkly | Chc | Chc | Chc | Chc | SChc | SChc | SChc | -- | -- | -- | -- | -- | SChc | SChc | SChc | SChc | SChc | SChc | SChc | SChc | SChc | -- | -- |
| Date | 05/10 | |||||||||||||||||||||||
| 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 (°F) | 54 | 53 | 53 | 52 | 51 | 50 | 49 | 48 | 49 | 49 | 50 | 52 | 55 | 58 | 60 | 62 | 63 | 64 | 65 | 65 | 65 | 65 | 64 | 62 |
| Dewpoint (°F) | 50 | 49 | 49 | 48 | 48 | 47 | 47 | 46 | 46 | 47 | 47 | 48 | 49 | 49 | 49 | 48 | 48 | 48 | 47 | 47 | 47 | 46 | 46 | 46 |
| Heat Index (°F) | ||||||||||||||||||||||||
| Surface Wind (mph) | 11 | 10 | 10 | 10 | 10 | 10 | 9 | 9 | 9 | 8 | 8 | 8 | 9 | 9 | 9 | 10 | 10 | 11 | 13 | 13 | 13 | 11 | 10 | 9 |
| Wind Dir | N | N | N | N | N | N | N | N | N | NNW | NNW | NNW | NNW | NNW | NNW | NW | NW | NW | NW | WNW | WNW | WNW | WNW | WNW |
| Gust | 18 | 16 | 15 | 15 | 15 | 16 | 17 | 17 | 16 | 15 | ||||||||||||||
| Sky Cover (%) | 59 | 57 | 57 | 57 | 56 | 57 | 57 | 57 | 57 | 57 | 57 | 45 | 34 | 22 | 34 | 45 | 57 | 51 | 44 | 38 | 34 | 29 | 25 | 23 |
| Precipitation Potential (%) | 15 | 15 | 15 | 15 | 6 | 6 | 6 | 6 | 6 | 6 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 17 | 17 |
| Relative Humidity (%) | 86 | 86 | 86 | 86 | 89 | 89 | 93 | 93 | 89 | 93 | 89 | 86 | 80 | 72 | 67 | 60 | 58 | 56 | 52 | 52 | 52 | 50 | 52 | 56 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | SChc | SChc |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
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