5-day weather forecast St. Louis 20-08-2026
Weather forecast St. Louis Thursday, August 20 20.08.2026: sunny, temperature from 20 °C to 30 °C.
Precipitation probability 29%. Wind up to 4.69 m/s (gusts 9.5 m/s). Air humidity 44–90%, atmospheric pressure 761–763 mm Hg, UV index up to 7.9.
5 days at a glance — tap a day to open it
Sunrise 06:19
Sunset 19:48
Sunset 19:48
First Quarter58% illuminated
Moonrise 15:08 · Moonset Does not set today
Moonrise 15:08 · Moonset Does not set today
Chart
Table
| Temperature | Rain chance | Cloud cover | Humidity | Pressure | Wind | UV Index | ||
|---|---|---|---|---|---|---|---|---|
| 00:00 |  Clear | 21 °C | 13% | 0% | 89% | 761 mm Hg | ENE 58° 2.5 (5.33) m/s | 0 |
| 01:00 |  Overcast | 21 °C | 29% | 99% | 90% | 761 mm Hg | NE 56° 2.31 (5.19) m/s | 0 |
| 02:00 | Clear | 21 °C | 13% | 0% | 89% | 761 mm Hg | ENE 62° 2.19 (4.61) m/s | 0 |
| 03:00 | Clear | 21 °C | 13% | 0% | 89% | 761 mm Hg | E 80° 1.89 (4.22) m/s | 0 |
| 04:00 | Clear | 20 °C | 13% | 0% | 89% | 761 mm Hg | E 85° 1.31 (2.81) m/s | 0 |
| 05:00 | Clear | 20 °C | 13% | 4% | 90% | 761 mm Hg | NE 45° 1.69 (2.39) m/s | 0 |
| 06:00 | Clear | 20 °C | 13% | 2% | 90% | 761 mm Hg | NE 43° 2.11 (3.42) m/s | 0 |
| 07:00 |  Sunny | 20 °C | 12% | 5% | 87% | 762 mm Hg | NE 37° 2.31 (4.39) m/s | 0.2 |
| 08:00 | Sunny | 21 °C | 9% | 4% | 79% | 762 mm Hg | NE 39° 2.39 (4.03) m/s | 0.7 |
| 09:00 | Sunny | 23 °C | 6% | 0% | 71% | 762 mm Hg | NE 35° 2.39 (3.61) m/s | 2 |
| 10:00 | Sunny | 25 °C | 4% | 0% | 64% | 763 mm Hg | NE 43° 2.19 (3.03) m/s | 3.8 |
| 11:00 | Sunny | 27 °C | 3% | 0% | 60% | 763 mm Hg | NE 35° 3 (3.81) m/s | 5.8 |
| 12:00 | Sunny | 28 °C | 3% | 0% | 57% | 762 mm Hg | NE 37° 3.89 (4.69) m/s | 7.4 |
| 13:00 | Sunny | 29 °C | 2% | 0% | 50% | 762 mm Hg | NE 42° 4.11 (4.64) m/s | 7.9 |
| 14:00 | Sunny | 30 °C | 1% | 0% | 46% | 762 mm Hg | NE 45° 4.69 (5.03) m/s | 7.4 |
| 15:00 | Sunny | 30 °C | 1% | 5% | 44% | 762 mm Hg | NE 48° 4.69 (4.83) m/s | 5.8 |
| 16:00 | Sunny | 29 °C | 1% | 1% | 44% | 762 mm Hg | NE 53° 4.5 (9.5) m/s | 3.8 |
| 17:00 | Sunny | 29 °C | 1% | 0% | 46% | 762 mm Hg | ENE 58° 4.31 (8.31) m/s | 1.9 |
| 18:00 | Sunny | 28 °C | 2% | 0% | 51% | 762 mm Hg | ENE 60° 3.89 (4.22) m/s | 0.8 |
| 19:00 | Sunny | 26 °C | 3% | 0% | 58% | 762 mm Hg | ENE 61° 3.31 (4.22) m/s | 0.2 |
| 20:00 | Clear | 25 °C | 4% | 0% | 66% | 762 mm Hg | ENE 58° 2.61 (4.92) m/s | 0 |
| 21:00 | Clear | 24 °C | 6% | 0% | 72% | 762 mm Hg | ENE 63° 2.89 (6.03) m/s | 0 |
| 22:00 | Clear | 23 °C | 7% | 0% | 74% | 763 mm Hg | ENE 61° 2.89 (6) m/s | 0 |
| 23:00 | Clear | 22 °C | 7% | 0% | 74% | 763 mm Hg | ENE 61° 2.69 (5.5) m/s | 0 |
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Data Sources & Methodology
Our weather forecasts are powered by a professional weather data provider that aggregates data from national weather services, satellite observations, radar networks, and over 80,000 weather stations worldwide. Forecast data is updated multiple times daily. We convert raw data into clear summaries — wind speed in m/s, pressure in mmHg — so you can plan your day with confidence.