Climate averages 1991–2020
St. Louis weather
in June.
A hot, wet month: the 3rd warmest and the 10th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
June is a hot month in St. Louis: daytime highs average 29.1°C and nights cool to about 19.3°C. By daytime temperature it is the 3rd warmest of the 12 months.
Expect about 106 mm of rain on roughly 11 days, which makes June a wet month (the 10th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 49 min on an average June day.
The nearest other city in this atlas is O'Fallon (48 km away). In June its highs average 28.6°C, about as warm as St. Louis, with 101 mm of rain.
Among the 498 cities listed in the United States, St. Louis ranks joint 187th of 498 for the warmest June highs and joint 375th of 498 for the driest June (rainfall, lowest first). The mean June high of those 498 cities is 27.9°C; St. Louis is 1.2°C warmer than that mean.
From June to July, average highs rise by 1.9°C to 31.0°C, and monthly rainfall falls from 106 mm to 86 mm.
The annual picture
June in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
St. Louis climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 4.3°C-4.3°C | -4.3°C | 70 | 8.2 | 9.810 h |
| February | 7.2°C-2.5°C | -2.5°C | 63 | 7.8 | 10.711 h |
| March | 13.0°C2.6°C | 2.6°C | 94 | 10.5 | 11.912 h |
| April | 19.1°C8.4°C | 8.4°C | 117 | 11.2 | 13.213 h |
| May | 24.3°C14.3°C | 14.3°C | 128 | 13.4 | 14.314 h |
| June, selected | 29.1°C19.3°C | 19.3°C | 106 | 11.0 | 14.815 h |
| July | 31.0°C21.6°C | 21.6°C | 86 | 9.9 | 14.615 h |
| August | 30.4°C20.9°C | 20.9°C | 74 | 9.1 | 13.714 h |
| September | 26.4°C16.6°C | 16.6°C | 83 | 7.6 | 12.512 h |
| October | 19.9°C10.3°C | 10.3°C | 87 | 8.4 | 11.211 h |
| November | 12.3°C3.6°C | 3.6°C | 93 | 8.6 | 10.110 h |
| December | 6.3°C-1.7°C | -1.7°C | 65 | 8.2 | 9.510 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
June in nearby cities
- O'Fallon in JuneUnited States · 48 kmHigh 28.6°C · Low 19.3°C · 101 mm rain
- Springfield (Illinois), United States in JuneUnited States · 139 kmHigh 27.4°C · Low 18.0°C · 110 mm rain
- Decatur in JuneUnited States · 172 kmHigh 27.1°C · Low 17.9°C · 110 mm rain
- Columbia (Missouri), United States in JuneUnited States · 189 kmHigh 28.8°C · Low 19.1°C · 113 mm rain
- Bloomington (Illinois), United States in JuneUnited States · 231 kmHigh 26.5°C · Low 17.2°C · 110 mm rain
- Peoria (Illinois), United States in JuneUnited States · 236 kmHigh 26.9°C · Low 17.8°C · 111 mm rain
- Champaign in JuneUnited States · 236 kmHigh 26.7°C · Low 17.3°C · 105 mm rain
- Evansville in JuneUnited States · 242 kmHigh 29.1°C · Low 19.8°C · 98 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for St. Louis) is explained once on the St. Louis year overview and on the Sources, method and limits page.