St. Louis weather in June
In June, St. Louis has daytime highs averaging 29 °C, nights around 19 °C, with 11 wet days. Figures are 1991–2020 climate normals.
- 29.4°C Average high
- 19.4°C Average low
- 11days Wet days
- 109mm Rainfall
- 15h Daylight
Daily temperatures through June
How June develops
Averages for the first, middle and last part of the month, from daily 1991–2020 normals. Chance of rain is the share of years in which that calendar day recorded more than 1 mm.
| Days | Avg high | Avg low | Chance of rain |
|---|---|---|---|
| 1–10 June | 27.8 °C | 17.7 °C | 35 % |
| 11–20 June | 29.8 °C | 19.8 °C | 39 % |
| 21–30 June | 30.6 °C | 20.6 °C | 33 % |
- Average highs rise from 27.8 °C early in June to 30.6 °C by the end of it.
- Rain is most likely over days 11–20 of June (39 % of days) and least likely over days 21–30 (33 %).
What to expect
| Measure | Typical June | Share of the month |
|---|---|---|
| Days above 25 °C | 27 of 30 | 90 % |
| Days above 30 °C | 14 of 30 | 47 % |
| Days below 0 °C | 0 of 30 | 0 % |
| Days with more than 1 mm rain | 11 of 30 | 36 % |
Conditions in June
| Measure | Average |
|---|---|
| Mean temperature | 24 °C |
| Record high (1991–2020) | 41 °C |
| Record low (1991–2020) | 9.3 °C |
| Relative humidity | 69 % |
| Wind speed | 15 km/h |
| Cloud cover | 53 % |
June compared with the months around it
| Month | Avg high | Rainfall | Cloud |
|---|---|---|---|
| April | 19.8 °C | 117 mm | 58 % |
| May | 24.8 °C | 129 mm | 59 % |
| June | 29.4 °C | 109 mm | 53 % |
| July | 31.3 °C | 94 mm | 48 % |
| August | 30.7 °C | 81 mm | 46 % |
See all twelve months for St. Louis
- June is the 3rd warmest month here.
- It is the 10th driest month of the year.
- It ranks 5th for least cloud cover.
- Days last about 15 hours from sunrise to sunset.
- It rains on 11 of 30 days — 36 % of the month.
- Nights are about 10 °C cooler than the middle of the day.
- The hottest June day on record since 1991 reached 41 °C, 12 °C above the usual daytime high.
QuestionsJune in St. Louis, answered
How warm is St. Louis in June?
Daily highs average 29 °C and nights fall to about 19 °C, a spread of 10 °C between afternoon and dawn. That makes June the 3rd warmest month of the year here.
Does it rain much in St. Louis in June?
June averages 109 mm of rain, spread over about 11 of the 30 days — 36 % of the month. Cloud cover averages 53 % of the sky.
How long are the days in June?
St. Louis averages 15 hours between sunrise and sunset in June. Day length is computed from latitude and date, so it is exact rather than modelled — but it says nothing about how much of that time is sunny.
Data sources and method
- ERA5 / ERA5-Land reanalysis — Copernicus Climate Change Service (C3S), ECMWF. Copernicus Licence
- Open-Meteo — Open-Meteo.com. CC BY 4.0
- NOAA OISST v2.1 — NOAA Physical Sciences Laboratory. Public domain
- GeoNames — GeoNames.org. CC BY 4.0
- Normal period
- 1991–2020
- Dataset version
- era5-1991-2020-scores1.1
- Last processed
Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: daylight hours, beach and comfort scores, monthly rankings, threshold day counts, chance of a wet day by date, ten-day averages within the month. Full formulas are on the methodology page.
Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.