Climate averages 1991–2020
Riverside weather
in June.
A hot, very dry month: the 4th warmest and the 3rd driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
June is a hot month in Riverside: daytime highs average 29.3°C and nights cool to about 15.4°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 3.4 mm of rain on fewer than one day, which makes June a very dry month (the 3rd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 22 min on an average June day.
The nearest other city in this atlas is Moreno Valley (15 km away). In June its highs average 28.6°C, 0.6°C cooler than Riverside, with 3.5 mm of rain.
Among the 498 cities listed in the United States, Riverside ranks joint 177th of 498 for the warmest June highs and joint 71st of 498 for the driest June (rainfall, lowest first). The mean June high of those 498 cities is 27.9°C; Riverside is 1.3°C warmer than that mean.
From June to July, average highs rise by 3.5°C to 32.7°C, and monthly rainfall falls from 3.4 mm to 2.2 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
Riverside climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 17.4°C4.7°C | 4.7°C | 96 | 6.6 | 10.210 h |
| February | 17.8°C5.7°C | 5.7°C | 111 | 7.4 | 10.911 h |
| March | 19.8°C7.5°C | 7.5°C | 68 | 6.8 | 12.012 h |
| April | 22.4°C9.5°C | 9.5°C | 32 | 4.6 | 13.013 h |
| May | 25.2°C12.3°C | 12.3°C | 15 | 2.6 | 13.914 h |
| June, selected | 29.3°C15.4°C | 15.4°C | 3.4 | 0.5 | 14.414 h |
| July | 32.7°C18.9°C | 18.9°C | 2.2 | 0.5 | 14.214 h |
| August | 33.8°C19.7°C | 19.7°C | 1.1 | 0.3 | 13.413 h |
| September | 32.0°C17.5°C | 17.5°C | 5.5 | 1.2 | 12.412 h |
| October | 26.9°C12.7°C | 12.7°C | 22 | 3.1 | 11.411 h |
| November | 21.6°C8.0°C | 8.0°C | 30 | 3.5 | 10.410 h |
| December | 17.1°C4.5°C | 4.5°C | 67 | 5.8 | 9.910 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
- Moreno Valley in JuneUnited States · 15 kmHigh 28.6°C · Low 16.0°C · 3.5 mm rain
- Fontana in JuneUnited States · 16 kmHigh 29.0°C · Low 15.0°C · 3.4 mm rain
- Corona in JuneUnited States · 18 kmHigh 28.7°C · Low 15.6°C · 3.4 mm rain
- San Bernardino in JuneUnited States · 20 kmHigh 29.5°C · Low 15.7°C · 3.5 mm rain
- Redlands in JuneUnited States · 23 kmHigh 29.8°C · Low 15.8°C · 3.5 mm rain
- Perris in JuneUnited States · 24 kmHigh 28.4°C · Low 16.0°C · 3.4 mm rain
- Rancho Cucamonga in JuneUnited States · 25 kmHigh 28.9°C · Low 15.3°C · 3.4 mm rain
- Ontario in JuneUnited States · 26 kmHigh 28.4°C · Low 15.3°C · 2.4 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 Riverside) is explained once on the Riverside year overview and on the Sources, method and limits page.
Fontana, Rancho Cucamonga and Corona lie in the same rainfall cell, so their rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.