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 · California temperature records
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Today in Rialto Weather HistorySee records, averages, and 55+ years of data for today's date
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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, CA Temperature Range by Month
Average monthly highs and lows. The shaded band shows the typical daily temperature range.
Avg high Avg low
Rialto, CA Monthly Precipitation
Average rainfall and snowfall per month, in inches.
Rain (in) Snow (in)
Rialto, CA Daily Temperature Calendar
Average daily high temperature for every day of the year. Each cell is the climatological mean for that calendar day across 55 years of NOAA data.
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Best Time to Visit Rialto, CA
Rialto, CA has no months that meet our "pleasant" threshold — every season has tradeoffs.
Jan
Feb
Mar
Apr
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Jul
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Dec
Pleasant (65-82°F, ≤2.5" rain) Mild Less ideal
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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Holiday Weather in Rialto
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