Rialto climate

Typical historical weather for Rialto, United States, averaged across 10 years of hourly climate data. Pick a date for a specific day.

Want today's actual conditions instead? See the current forecast for Rialto.

Annual average

17.1°C

across all months

Warmest month

32.9°C

Aug average high

Coolest month

5.3°C

Jan average low

Annual rainfall

441mm

total per year

Monthly averages

Average daily high/low temperature (band) and monthly rainfall (bars).

● Avg high● Avg low▮ Rainfall

Records on file

Hottest day

43.8°C

6 September 2020

Coldest day

-2.8°C

26 January 2021

Wettest day

75.2mm

5 February 2024

Windiest day

3.8m/s

7 January 2025