Historical Weather in Rialto, CA
See 55+ years of weather history for any date in Rialto going back to 1970.
Part of California weather history
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Today in Rialto Weather HistorySee records, averages, and 55+ years of data for today's date
→Monthly Climate Averages
Historical temperature and precipitation averages for Rialto, CA, based on 55+ years of weather data.
Warmest MonthAugustAvg High: 95°F / Low: 64°F
Coldest MonthDecemberAvg High: 65°F / Low: 44°F
Jan
65°/ 44°
💧 12.1"
Feb
67°/ 45°
💧 13.3"
Mar
69°/ 47°
💧 10.6"
Apr
74°/ 49°
💧 6.1"
May
79°/ 53°
💧 4.2"
Jun
87°/ 58°
💧 2.7"
Jul
94°/ 63°
💧 1.7"
Aug
95°/ 64°
💧 7.7"
Sep
90°/ 62°
💧 6.1"
Oct
81°/ 55°
💧 6.2"
Nov
72°/ 49°
💧 10.0"
Dec
65°/ 44°
💧 9.9"
❄️ 0.1"
Temperatures in Fahrenheit. Precipitation and snowfall in inches.
Rialto Temperature Records
- Record High: The hottest temperature ever recorded in Rialto, CA is 118°F, set on July 6, 2018.
- Record Low: The coldest temperature ever recorded in Rialto, CA is 13°F, set on January 13, 2007.
- Data Coverage: Based on 25 years of data from NOAA weather station: LYTLE CREEK CALIFORNIA.
All-Time Record High
118°F
July 6, 2018
All-Time Record Low
13°F
January 13, 2007
Monthly Temperature Records in Rialto
| Month | Record High | Record Low |
|---|---|---|
| January | 101°F(2003) | 13°F(2007) |
| February | 92°F(2016) | 21°F(2006) |
| March | 97°F(2011) | 23°F(2002) |
| April | 102°F(2004) | 27°F(2024) |
| May | 106°F(2003) | 33°F(2002) |
| June | 114°F(2016) | 37°F(2011) |
| July | 118°F(2018) | 42°F(2010) |
| August | 112°F(2017) | 45°F(2010) |
| September | 118°F(2020) | 39°F(2007) |
| October | 109°F(2024) | 32°F(2000) |
| November | 100°F(2010) | 23°F(2012) |
| December | 90°F(2005) | 22°F(2003) |
Rialto Snow RecordsSee the top 10 snowiest days ever recorded
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