| Point Forecast: Decatur Airport IL 39.84N 88.88W (Elev. 650 ft) |
Last Update: 7:41 pm CDT May 14, 2024 |
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| Date | 05/14 | 05/15 | ||||||||||||||||||||||
| 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 (°F) | 63 | 62 | 61 | 60 | 60 | 60 | 59 | 59 | 58 | 58 | 58 | 58 | 60 | 61 | 64 | 67 | 69 | 70 | 72 | 73 | 74 | 74 | 73 | 71 |
| Dewpoint (°F) | 63 | 62 | 61 | 60 | 58 | 57 | 56 | 56 | 55 | 55 | 55 | 56 | 56 | 57 | 58 | 59 | 60 | 60 | 60 | 59 | 60 | 59 | 59 | 58 |
| Heat Index (°F) | ||||||||||||||||||||||||
| Surface Wind (mph) | 10 | 11 | 13 | 13 | 11 | 11 | 10 | 10 | 9 | 10 | 10 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 10 | 10 | 9 | 9 | 8 |
| Wind Dir | NE | NE | NNE | NNE | NNE | NNE | NNE | N | N | N | N | N | N | NNE | NNE | NNE | NNE | NNE | NNE | NNE | NNE | NNE | NNE | NNE |
| Gust | 16 | 17 | 18 | 18 | 17 | 17 | 16 | 15 | 15 | 16 | 16 | 20 | 20 | 18 | 18 | 17 | 16 | 16 | 15 | |||||
| Sky Cover (%) | 78 | 80 | 79 | 74 | 69 | 73 | 78 | 82 | 85 | 87 | 87 | 84 | 81 | 78 | 71 | 70 | 66 | 63 | 64 | 64 | 66 | 61 | 44 | 27 |
| Precipitation Potential (%) | 39 | 35 | 32 | 26 | 19 | 16 | 14 | 12 | 10 | 7 | 7 | 6 | 6 | 6 | 4 | 4 | 4 | 5 | 5 | 5 | 3 | 3 | 3 | 1 |
| Relative Humidity (%) | 100 | 100 | 100 | 100 | 93 | 90 | 90 | 90 | 90 | 90 | 90 | 93 | 87 | 87 | 81 | 75 | 73 | 71 | 66 | 62 | 62 | 59 | 62 | 63 |
| Rain | Chc | Chc | Chc | Chc | SChc | SChc | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | SChc | SChc | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Date | 05/16 | |||||||||||||||||||||||
| 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 (°F) | 70 | 65 | 63 | 62 | 59 | 57 | 57 | 56 | 55 | 56 | 57 | 57 | 61 | 64 | 68 | 70 | 71 | 71 | 72 | 72 | 72 | 72 | 71 | 70 |
| Dewpoint (°F) | 58 | 58 | 58 | 57 | 56 | 54 | 54 | 53 | 53 | 53 | 54 | 54 | 56 | 58 | 59 | 60 | 61 | 61 | 61 | 62 | 62 | 62 | 62 | 62 |
| Heat Index (°F) | ||||||||||||||||||||||||
| Surface Wind (mph) | 8 | 8 | 8 | 8 | 7 | 6 | 6 | 5 | 5 | 5 | 5 | 6 | 7 | 8 | 9 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 9 | 9 |
| Wind Dir | NNE | NE | NE | NE | NE | ENE | ENE | E | E | E | ESE | SE | SE | SSE | S | S | S | S | S | S | S | S | S | S |
| Gust | 15 | 16 | 16 | 16 | 15 | |||||||||||||||||||
| Sky Cover (%) | 23 | 19 | 15 | 21 | 28 | 34 | 37 | 40 | 43 | 46 | 50 | 53 | 60 | 68 | 75 | 79 | 84 | 88 | 88 | 88 | 88 | 78 | 67 | 57 |
| Precipitation Potential (%) | 1 | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | 21 | 21 | 21 | 21 | 21 | 21 | 56 | 56 | 56 | 56 | 56 | 56 | 57 |
| Relative Humidity (%) | 67 | 77 | 82 | 85 | 87 | 89 | 90 | 91 | 92 | 91 | 89 | 90 | 83 | 80 | 73 | 70 | 70 | 71 | 70 | 70 | 71 | 72 | 73 | 76 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | SChc | SChc | SChc | SChc | SChc | SChc | Lkly | Lkly | Lkly | Lkly | Lkly | Lkly | Lkly |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | Chc | Chc | Chc | Chc | Chc | Chc | Chc |
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