| Point Forecast: West Alton MO 38.86N 90.22W (Elev. 130 m) |
Last Update: 2:11 am CDT May 19, 2026 |
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| Date | 05/19 | 05/20 | ||||||||||||||||||||||
| Hour (CDT) | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 |
| Temperature (°C) | 19 | 19 | 19 | 19 | 19 | 19 | 21 | 22 | 23 | 24 | 24 | 25 | 25 | 25 | 24 | 24 | 23 | 21 | 19 | 18 | 17 | 17 | 17 | 17 |
| Dewpoint (°C) | 18 | 18 | 18 | 18 | 18 | 18 | 19 | 19 | 20 | 21 | 21 | 21 | 20 | 21 | 21 | 20 | 19 | 18 | 17 | 16 | 15 | 14 | 14 | 13 |
| Heat Index (°C) | 24 | 24 | 25 | 25 | 25 | 24 | 24 | |||||||||||||||||
| Surface Wind (mph) | 11 | 9 | 8 | 8 | 8 | 8 | 9 | 10 | 11 | 11 | 13 | 14 | 13 | 11 | 10 | 10 | 10 | 11 | 10 | 9 | 9 | 9 | 9 | 9 |
| Wind Dir | S | S | S | S | S | S | S | S | S | SW | SW | SW | SW | W | W | NW | NW | N | N | N | N | N | N | N |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 46 | 44 | 63 | 71 | 76 | 91 | 93 | 85 | 87 | 80 | 86 | 82 | 77 | 84 | 86 | 84 | 86 | 91 | 87 | 95 | 95 | 92 | 89 | 91 |
| Precipitation Potential (%) | 17 | 28 | 34 | 39 | 62 | 85 | 57 | 29 | 32 | 34 | 38 | 42 | 39 | 37 | 37 | 37 | 38 | 39 | 35 | 31 | 30 | 29 | 25 | 21 |
| Relative Humidity (%) | 93 | 93 | 90 | 90 | 93 | 93 | 90 | 87 | 84 | 82 | 79 | 76 | 74 | 76 | 79 | 79 | 81 | 84 | 84 | 84 | 87 | 84 | 81 | 81 |
| Rain | SChc | Chc | Chc | Chc | Lkly | Ocnl | Lkly | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | SChc |
| Thunder | -- | -- | Chc | Chc | Chc | SChc | SChc | SChc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | SChc |
| Date | 05/21 | |||||||||||||||||||||||
| Hour (CDT) | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 |
| Temperature (°C) | 16 | 15 | 14 | 14 | 13 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 20 | 20 | 21 | 21 | 20 | 19 | 18 | 17 | 16 | 15 | 14 |
| Dewpoint (°C) | 13 | 12 | 12 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 10 | 9 |
| Heat Index (°C) | ||||||||||||||||||||||||
| Surface Wind (mph) | 9 | 9 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 9 | 9 | 9 | 10 | 10 | 10 | 8 | 7 | 7 | 7 | 7 | 7 | 7 |
| Wind Dir | N | N | N | N | N | N | N | N | N | N | N | N | NE | NE | NE | NE | NE | NE | NE | NE | NE | NE | NE | NE |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 87 | 85 | 83 | 81 | 79 | 74 | 60 | 67 | 48 | 51 | 56 | 62 | 70 | 76 | 56 | 65 | 70 | 52 | 37 | 54 | 71 | 68 | 65 | 62 |
| Precipitation Potential (%) | 20 | 19 | 17 | 15 | 9 | 4 | 3 | 2 | 2 | 2 | 3 | 5 | 5 | 5 | 5 | 5 | 5 | 10 | 10 | 10 | 10 | 10 | 10 | 6 |
| Relative Humidity (%) | 84 | 83 | 83 | 83 | 83 | 86 | 80 | 75 | 70 | 67 | 63 | 61 | 57 | 57 | 57 | 53 | 53 | 57 | 61 | 65 | 70 | 70 | 72 | 72 |
| Rain | SChc | SChc | SChc | SChc | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | SChc | SChc | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
