| Point Forecast: East Alton IL 38.88N 90.11W (Elev. 436 ft) |
Last Update: 9:37 am CDT Jul 15, 2025 |
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| Date | 07/15 | 07/16 | ||||||||||||||||||||||
| Hour (CDT) | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 |
| Temperature (°F) | 81 | 83 | 84 | 85 | 86 | 86 | 87 | 85 | 82 | 81 | 81 | 79 | 78 | 77 | 77 | 75 | 74 | 74 | 73 | 73 | 72 | 73 | 74 | 78 |
| Dewpoint (°F) | 75 | 75 | 74 | 74 | 73 | 73 | 73 | 74 | 73 | 74 | 74 | 74 | 74 | 74 | 75 | 74 | 73 | 73 | 73 | 73 | 72 | 73 | 73 | 74 |
| Heat Index (°F) | 87 | 90 | 91 | 93 | 93 | 93 | 94 | 93 | 87 | 86 | 86 | 79 | 78 | 77 | 77 | 75 | 78 | |||||||
| Surface Wind (mph) | 2 | 3 | 5 | 6 | 7 | 7 | 7 | 7 | 6 | 5 | 6 | 5 | 3 | 3 | 3 | 3 | 3 | 2 | 2 | 2 | 3 | 2 | 2 | 2 |
| Wind Dir | SE | SE | S | S | S | S | S | S | S | S | SE | SE | SE | SE | S | S | S | S | S | S | SW | S | S | SW |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 91 | 40 | 31 | 31 | 61 | 50 | 84 | 76 | 84 | 74 | 69 | 63 | 58 | 54 | 48 | 43 | 43 | 41 | 39 | 41 | 42 | 45 | 47 | 39 |
| Precipitation Potential (%) | 15 | 13 | 11 | 15 | 18 | 25 | 31 | 33 | 35 | 25 | 15 | 13 | 10 | 8 | 5 | 4 | 3 | 2 | 2 | 1 | 1 | 0 | 5 | 5 |
| Relative Humidity (%) | 82 | 77 | 72 | 70 | 65 | 65 | 63 | 70 | 74 | 79 | 79 | 85 | 88 | 90 | 94 | 97 | 97 | 97 | 100 | 100 | 100 | 100 | 97 | 88 |
| Rain | SChc | -- | -- | SChc | SChc | Chc | Chc | Chc | Chc | Chc | SChc | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | SChc | -- | -- | SChc | SChc | Chc | Chc | Chc | Chc | Chc | SChc | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Date | 07/17 | |||||||||||||||||||||||
| Hour (CDT) | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 |
| Temperature (°F) | 81 | 85 | 88 | 89 | 90 | 91 | 93 | 93 | 92 | 89 | 87 | 85 | 83 | 81 | 79 | 78 | 77 | 76 | 76 | 76 | 76 | 75 | 76 | 78 |
| Dewpoint (°F) | 75 | 75 | 75 | 75 | 74 | 74 | 73 | 73 | 73 | 73 | 73 | 73 | 74 | 74 | 74 | 74 | 74 | 74 | 73 | 73 | 73 | 73 | 73 | 73 |
| Heat Index (°F) | 87 | 94 | 98 | 99 | 99 | 101 | 102 | 102 | 101 | 97 | 94 | 92 | 90 | 86 | 79 | 78 | 77 | 76 | 76 | 76 | 76 | 75 | 76 | 78 |
| Surface Wind (mph) | 3 | 5 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 5 | 5 | 5 | 5 | 5 | 5 | 3 | 3 | 3 | 5 | 5 | 5 |
| Wind Dir | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | S | S | S | S | SW | SW | W | W | SW | SW | SW | W | W | W |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 19 | 12 | 27 | 24 | 21 | 20 | 19 | 18 | 26 | 33 | 41 | 42 | 44 | 45 | 45 | 44 | 44 | 42 | 40 | 38 | 39 | 41 | 42 | 45 |
| Precipitation Potential (%) | 5 | 5 | 5 | 5 | 14 | 14 | 14 | 14 | 14 | 14 | 23 | 23 | 23 | 23 | 23 | 23 | 13 | 13 | 13 | 13 | 13 | 13 | 10 | 10 |
| Relative Humidity (%) | 82 | 72 | 66 | 64 | 60 | 58 | 52 | 52 | 54 | 59 | 63 | 67 | 74 | 79 | 85 | 88 | 90 | 94 | 90 | 90 | 90 | 94 | 90 | 85 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | SChc | SChc | SChc | SChc | SChc | SChc | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | SChc | SChc | SChc | SChc | SChc | SChc | -- | -- | -- | -- | -- | -- | -- | -- |
