Climate almanac
Rialto
California, US · 34.11°, -117.37°
What is the climate like in Rialto?
Rialto is warmest in August, when daily highs average 92°F (33°C), and coolest in January, when lows fall to about 42°F (5°C). The wettest month is typically January and the driest is June; the year sees roughly 17 in of precipitation.
- Warmest monthAugust — average high 92°F (33°C)
- Coolest monthJanuary — average low 42°F (5°C)
- Wettest monthJanuary (3.3 in)
- Driest monthJune (0.1 in)
- Annual precipitation17 in