Climate averages 1991–2020
Simi Valley weather
in June.
A warm, very dry month: the 4th warmest and the 2nd driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
June is a warm month in Simi Valley: daytime highs average 26.8°C and nights cool to about 15.6°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 2.0 mm of rain on fewer than one day, which makes June a very dry month (the 2nd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 24 min on an average June day.
The nearest other city in this atlas is Thousand Oaks (12 km away). In June its highs average 25.8°C, 1.1°C cooler than Simi Valley, with 2.0 mm of rain.
Among the 498 cities listed in the United States, Simi Valley ranks joint 284th of 498 for the warmest June highs and joint 38th of 498 for the driest June (rainfall, lowest first). The mean June high of those 498 cities is 27.9°C; Simi Valley is 1.1°C cooler than that mean.
From June to July, average highs rise by 2.8°C to 29.6°C, and monthly rainfall rises from 2.0 mm to 3.1 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
Simi Valley climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 17.7°C6.0°C | 6.0°C | 91 | 5.6 | 10.110 h |
| February | 17.8°C6.4°C | 6.4°C | 98 | 6.4 | 10.911 h |
| March | 19.5°C7.9°C | 7.9°C | 66 | 5.6 | 11.912 h |
| April | 21.7°C9.7°C | 9.7°C | 22 | 2.9 | 13.013 h |
| May | 23.9°C12.7°C | 12.7°C | 12 | 1.8 | 13.914 h |
| June, selected | 26.8°C15.6°C | 15.6°C | 2.0 | 0.5 | 14.414 h |
| July | 29.6°C18.7°C | 18.7°C | 3.1 | 0.5 | 14.214 h |
| August | 30.7°C19.3°C | 19.3°C | 0.3 | 0.1 | 13.413 h |
| September | 29.5°C17.6°C | 17.6°C | 3.9 | 0.6 | 12.412 h |
| October | 25.8°C13.7°C | 13.7°C | 20 | 2.1 | 11.411 h |
| November | 21.5°C9.2°C | 9.2°C | 21 | 2.6 | 10.410 h |
| December | 17.4°C5.9°C | 5.9°C | 58 | 4.8 | 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
- Thousand Oaks in JuneUnited States · 12 kmHigh 25.8°C · Low 15.6°C · 2.0 mm rain
- Valencia, United States in JuneUnited States · 25 kmHigh 28.6°C · Low 15.6°C · 2.4 mm rain
- Santa Clarita in JuneUnited States · 26 kmHigh 28.5°C · Low 15.5°C · 2.4 mm rain
- Oxnard in JuneUnited States · 37 kmHigh 21.8°C · Low 15.0°C · 1.4 mm rain
- Burbank in JuneUnited States · 45 kmHigh 28.8°C · Low 15.8°C · 2.3 mm rain
- Ventura in JuneUnited States · 47 kmHigh 23.6°C · Low 15.5°C · 1.4 mm rain
- Glendale (California), United States in JuneUnited States · 50 kmHigh 27.3°C · Low 14.6°C · 2.3 mm rain
- Inglewood in JuneUnited States · 52 kmHigh 26.0°C · Low 15.3°C · 2.0 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 Simi Valley) is explained once on the Simi Valley year overview and on the Sources, method and limits page.
Thousand Oaks lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.