| Point Forecast: Ballwin MO 38.58N 90.55W (Elev. 584 ft) |
Last Update: 3:51 am CDT Sep 16, 2026 |
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| Date | 09/16 | 09/17 | ||||||||||||||||||||||
| Hour (CDT) | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 |
| Temperature (°F) | 79 | 78 | 77 | 76 | 77 | 80 | 84 | 87 | 90 | 92 | 94 | 94 | 93 | 93 | 91 | 89 | 86 | 84 | 82 | 81 | 80 | 80 | 79 | 78 |
| Dewpoint (°F) | 72 | 72 | 72 | 72 | 73 | 74 | 74 | 75 | 75 | 75 | 74 | 73 | 73 | 74 | 74 | 74 | 75 | 74 | 74 | 74 | 73 | 73 | 72 | 71 |
| Heat Index (°F) | 79 | 78 | 77 | 76 | 77 | 85 | 91 | 96 | 101 | 103 | 105 | 103 | 102 | 103 | 101 | 98 | 95 | 91 | 88 | 86 | 84 | 84 | 79 | 78 |
| Surface Wind (mph) | 3 | 2 | 3 | 3 | 2 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 |
| Wind Dir | S | N | NE | NE | NE | E | E | SE | S | SW | W | W | NW | SW | S | S | S | S | S | S | S | S | S | S |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 71 | 76 | 74 | 68 | 67 | 54 | 41 | 35 | 29 | 21 | 17 | 22 | 34 | 48 | 61 | 68 | 61 | 49 | 40 | 23 | 15 | 20 | 17 | 15 |
| Precipitation Potential (%) | 30 | 33 | 31 | 28 | 25 | 23 | 20 | 19 | 19 | 18 | 18 | 18 | 18 | 24 | 30 | 4 | 2 | 1 | 1 | 1 | 1 | 1 | 2 | 2 |
| Relative Humidity (%) | 79 | 82 | 85 | 87 | 88 | 82 | 72 | 68 | 62 | 58 | 53 | 51 | 52 | 54 | 58 | 61 | 70 | 72 | 77 | 79 | 79 | 79 | 79 | 79 |
| Rain | Chc | Chc | Chc | Chc | Chc | SChc | SChc | SChc | SChc | SChc | SChc | SChc | SChc | SChc | Chc | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | Chc | Chc | Chc | Chc | Chc | SChc | SChc | SChc | SChc | SChc | SChc | SChc | SChc | SChc | Chc | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Date | 09/18 | |||||||||||||||||||||||
| Hour (CDT) | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 |
| Temperature (°F) | 78 | 77 | 77 | 77 | 79 | 83 | 87 | 90 | 94 | 95 | 97 | 97 | 96 | 96 | 93 | 89 | 86 | 84 | 82 | 81 | 80 | 79 | 78 | 77 |
| Dewpoint (°F) | 71 | 71 | 70 | 70 | 70 | 71 | 72 | 72 | 73 | 73 | 72 | 72 | 72 | 72 | 73 | 73 | 74 | 74 | 73 | 73 | 73 | 73 | 73 | 72 |
| Heat Index (°F) | 78 | 77 | 77 | 77 | 79 | 88 | 94 | 97 | 103 | 105 | 106 | 106 | 105 | 105 | 102 | 97 | 94 | 91 | 87 | 86 | 84 | 79 | 78 | 77 |
| Surface Wind (mph) | 3 | 3 | 3 | 3 | 3 | 3 | 5 | 5 | 5 | 5 | 3 | 3 | 2 | 2 | 2 | 1 | 1 | 1 | 0 | 0 | 1 | 1 | 1 | 1 |
| Wind Dir | SW | SW | SW | SW | SW | SW | W | W | W | W | NW | NW | N | SW | SW | SW | S | W | NW | N | NE | NE | NE | NE |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 7 | 9 | 14 | 18 | 34 | 19 | 23 | 26 | 29 | 38 | 23 | 18 | 16 | 32 | 40 | 39 | 19 | 25 | 31 | 32 | 33 | 34 | 34 | 35 |
| Precipitation Potential (%) | 3 | 1 | 2 | 2 | 2 | 0 | 0 | 0 | 2 | 3 | 10 | 22 | 15 | 17 | 25 | 8 | 8 | 8 | 8 | 8 | 8 | 7 | 7 | 7 |
| Relative Humidity (%) | 79 | 82 | 79 | 79 | 74 | 67 | 61 | 56 | 51 | 49 | 45 | 45 | 46 | 46 | 52 | 59 | 68 | 72 | 74 | 77 | 79 | 82 | 85 | 85 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | SChc | SChc | SChc | Chc | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | SChc | SChc | SChc | Chc | -- | -- | -- | -- | -- | -- | -- | -- | -- |
