| Point Forecast: East Alton IL 38.88N 90.11W (Elev. 133 m) |
Last Update: 2:51 am CDT Jun 19, 2025 |
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| Date | 06/19 | 06/20 | ||||||||||||||||||||||
| Hour (CDT) | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 |
| Temperature (°C) | 21 | 22 | 24 | 26 | 27 | 28 | 29 | 29 | 29 | 29 | 29 | 29 | 27 | 25 | 23 | 23 | 22 | 21 | 21 | 21 | 21 | 20 | 20 | 21 |
| Dewpoint (°C) | 19 | 19 | 19 | 19 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 19 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 |
| Heat Index (°C) | 24 | 26 | 28 | 29 | 29 | 30 | 30 | 30 | 30 | 29 | 28 | 25 | ||||||||||||
| Surface Wind (mph) | 8 | 7 | 7 | 8 | 8 | 8 | 7 | 7 | 8 | 8 | 7 | 6 | 6 | 5 | 5 | 3 | 5 | 5 | 5 | 5 | 5 | 3 | 5 | 3 |
| Wind Dir | NW | NW | NW | NW | NW | NW | NW | NW | NW | W | W | W | W | W | SW | SW | SW | S | S | S | S | S | S | S |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 26 | 30 | 24 | 23 | 16 | 8 | 5 | 6 | 17 | 11 | 15 | 10 | 1 | 5 | 8 | 7 | 7 | 8 | 2 | 21 | 10 | 10 | 9 | 4 |
| Precipitation Potential (%) | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Relative Humidity (%) | 87 | 81 | 74 | 67 | 60 | 56 | 51 | 50 | 50 | 50 | 50 | 51 | 60 | 69 | 74 | 76 | 79 | 84 | 84 | 84 | 84 | 90 | 87 | 84 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Date | 06/21 | |||||||||||||||||||||||
| Hour (CDT) | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 |
| Temperature (°C) | 23 | 26 | 27 | 28 | 29 | 31 | 31 | 32 | 32 | 32 | 32 | 31 | 30 | 29 | 28 | 27 | 27 | 26 | 26 | 26 | 25 | 25 | 25 | 25 |
| Dewpoint (°C) | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 20 | 20 | 20 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 22 |
| Heat Index (°C) | 26 | 28 | 29 | 31 | 32 | 33 | 34 | 34 | 34 | 34 | 33 | 32 | 31 | 30 | 29 | 28 | 26 | 26 | 26 | 25 | 25 | 25 | 25 | |
| Surface Wind (mph) | 7 | 9 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 9 | 9 | 9 | 8 | 8 | 8 | 8 | 8 |
| Wind Dir | S | S | S | S | S | S | S | S | S | S | S | S | S | S | S | S | S | S | S | S | S | S | S | S |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 4 | 8 | 14 | 22 | 30 | 37 | 34 | 33 | 28 | 22 | 16 | 11 | 9 | 8 | 7 | 6 | 5 | 4 | 5 | 6 | 7 | 7 | 6 | 7 |
| Precipitation Potential (%) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Relative Humidity (%) | 79 | 67 | 60 | 57 | 55 | 52 | 50 | 50 | 49 | 49 | 52 | 54 | 57 | 63 | 67 | 69 | 72 | 74 | 76 | 76 | 79 | 79 | 79 | 85 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
