| Point Forecast: East Alton IL 38.88N 90.11W (Elev. 133 m) |
Last Update: 5:21 am CDT Jun 18, 2025 |
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| Date | 06/18 | 06/19 | ||||||||||||||||||||||
| Hour (CDT) | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 |
| Temperature (°C) | 21 | 22 | 23 | 24 | 26 | 26 | 27 | 27 | 27 | 29 | 28 | 27 | 26 | 24 | 23 | 23 | 22 | 22 | 21 | 21 | 20 | 19 | 19 | 19 |
| Dewpoint (°C) | 21 | 22 | 22 | 21 | 21 | 20 | 20 | 20 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 20 | 21 | 21 | 20 | 20 | 20 | 19 | 19 | 19 |
| Heat Index (°C) | 24 | 26 | 26 | 28 | 28 | 29 | 31 | 29 | 29 | 26 | 24 | |||||||||||||
| Surface Wind (mph) | 8 | 10 | 11 | 15 | 17 | 17 | 16 | 16 | 15 | 14 | 13 | 11 | 11 | 9 | 8 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 |
| Wind Dir | S | S | SW | SW | SW | SW | SW | SW | W | W | W | SW | SW | SW | SW | W | W | W | W | W | W | W | W | NW |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 76 | 74 | 82 | 73 | 71 | 70 | 67 | 68 | 74 | 72 | 73 | 76 | 77 | 72 | 73 | 73 | 72 | 62 | 63 | 58 | 44 | 41 | 37 | 35 |
| Precipitation Potential (%) | 37 | 42 | 47 | 40 | 33 | 31 | 29 | 37 | 45 | 44 | 43 | 43 | 42 | 42 | 42 | 33 | 24 | 14 | 4 | 3 | 1 | 2 | 2 | 2 |
| Relative Humidity (%) | 100 | 95 | 94 | 83 | 74 | 71 | 68 | 66 | 66 | 61 | 65 | 70 | 72 | 81 | 87 | 84 | 90 | 94 | 94 | 95 | 99 | 99 | 96 | 96 |
| Rain | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | SChc | -- | -- | -- | -- | -- | -- | -- |
| Thunder | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Date | 06/20 | |||||||||||||||||||||||
| Hour (CDT) | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 |
| Temperature (°C) | 20 | 21 | 22 | 24 | 25 | 26 | 28 | 28 | 28 | 29 | 29 | 28 | 28 | 27 | 25 | 23 | 22 | 22 | 21 | 21 | 21 | 21 | 21 | 21 |
| Dewpoint (°C) | 19 | 19 | 19 | 19 | 19 | 19 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 19 | 19 | 19 | 19 | 19 | 19 | 18 | 18 | 18 | 18 |
| Heat Index (°C) | 24 | 25 | 26 | 29 | 29 | 29 | 30 | 30 | 29 | 29 | 28 | 25 | ||||||||||||
| Surface Wind (mph) | 7 | 7 | 7 | 8 | 8 | 8 | 9 | 8 | 8 | 8 | 7 | 7 | 3 | 3 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 |
| Wind Dir | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | W | S | SE | S | S | S | S | S | S | S | S |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 32 | 27 | 21 | 16 | 20 | 25 | 28 | 27 | 25 | 22 | 18 | 15 | 12 | 11 | 11 | 10 | 9 | 9 | 8 | 11 | 14 | 17 | 17 | 16 |
| Precipitation Potential (%) | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Relative Humidity (%) | 94 | 89 | 84 | 74 | 71 | 65 | 57 | 55 | 54 | 52 | 53 | 52 | 53 | 60 | 69 | 76 | 81 | 84 | 87 | 90 | 87 | 87 | 87 | 84 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
