| Point Forecast: East Alton IL 38.88N 90.11W (Elev. 436 ft) |
Last Update: 7:36 pm CDT May 14, 2025 |
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| Date | 05/14 | 05/15 | ||||||||||||||||||||||
| 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) | 75 | 73 | 73 | 72 | 71 | 71 | 71 | 70 | 69 | 70 | 71 | 73 | 76 | 81 | 85 | 86 | 89 | 91 | 91 | 91 | 90 | 89 | 84 | 79 |
| Dewpoint (°F) | 67 | 68 | 69 | 68 | 68 | 68 | 68 | 67 | 68 | 67 | 68 | 68 | 69 | 68 | 68 | 69 | 69 | 68 | 67 | 66 | 65 | 65 | 64 | 63 |
| Heat Index (°F) | 75 | 76 | 84 | 88 | 90 | 94 | 95 | 94 | 94 | 92 | 91 | 85 | 79 | |||||||||||
| Surface Wind (mph) | 9 | 9 | 8 | 8 | 7 | 7 | 7 | 8 | 8 | 8 | 9 | 10 | 10 | 13 | 14 | 14 | 15 | 15 | 15 | 15 | 14 | 13 | 11 | 10 |
| Wind Dir | SE | SE | SE | SE | SE | SE | SE | SE | SE | SE | SE | S | S | S | S | S | S | SW | SW | SW | SW | SW | SW | SW |
| Gust | 21 | 23 | 25 | 24 | 24 | 23 | 22 | 20 | ||||||||||||||||
| Sky Cover (%) | 64 | 65 | 65 | 65 | 65 | 64 | 63 | 63 | 57 | 52 | 47 | 43 | 51 | 38 | 43 | 48 | 54 | 58 | 62 | 66 | 65 | 63 | 61 | 55 |
| Precipitation Potential (%) | 11 | 9 | 7 | 7 | 7 | 6 | 5 | 5 | 4 | 4 | 4 | 5 | 6 | 7 | 7 | 8 | 9 | 11 | 14 | 16 | 14 | 13 | 11 | 9 |
| Relative Humidity (%) | 76 | 84 | 87 | 87 | 90 | 90 | 90 | 90 | 97 | 90 | 90 | 84 | 79 | 65 | 57 | 57 | 52 | 47 | 45 | 44 | 44 | 45 | 51 | 58 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | SChc | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | SChc | -- | -- | -- | -- |
| Date | 05/16 | |||||||||||||||||||||||
| 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) | 77 | 73 | 71 | 69 | 68 | 67 | 66 | 64 | 63 | 62 | 63 | 68 | 74 | 80 | 84 | 88 | 89 | 89 | 87 | 86 | 84 | 82 | 80 | 77 |
| Dewpoint (°F) | 63 | 62 | 61 | 59 | 58 | 58 | 58 | 58 | 58 | 57 | 57 | 58 | 59 | 59 | 59 | 59 | 59 | 60 | 60 | 61 | 62 | 63 | 63 | 63 |
| Heat Index (°F) | 77 | 81 | 84 | 87 | 88 | 89 | 87 | 86 | 85 | 83 | 81 | 77 | ||||||||||||
| Surface Wind (mph) | 10 | 9 | 8 | 8 | 7 | 7 | 6 | 6 | 6 | 6 | 6 | 7 | 8 | 9 | 10 | 13 | 14 | 14 | 14 | 14 | 13 | 13 | 11 | 10 |
| Wind Dir | SW | SW | SW | SW | SW | SW | SW | SW | SW | S | S | S | S | S | S | S | S | S | SW | SW | SW | SW | SW | SW |
| Gust | 20 | 21 | 22 | 23 | 23 | 22 | 21 | 20 | ||||||||||||||||
| Sky Cover (%) | 48 | 42 | 32 | 22 | 11 | 9 | 6 | 3 | 3 | 4 | 4 | 4 | 5 | 5 | 8 | 10 | 13 | 22 | 32 | 41 | 41 | 40 | 40 | 35 |
| Precipitation Potential (%) | 6 | 3 | 2 | 1 | 1 | 1 | 1 | 1 | 3 | 4 | 6 | 6 | 6 | 6 | 6 | 6 | 46 | 46 | 46 | 54 | 54 | 54 | 35 | 35 |
| Relative Humidity (%) | 62 | 68 | 71 | 70 | 70 | 73 | 75 | 81 | 84 | 84 | 81 | 70 | 59 | 49 | 43 | 38 | 37 | 38 | 40 | 43 | 48 | 53 | 56 | 62 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc |
