2025 Compare Cities Climate:
Rialto, CA vs Ontario, CA

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Highlights
- Ontario has 9.0% more rainy days than Rialto.
- Ontario has 1.1% less Sunny Days than Rialto.
- On the BestPlaces comfort index, Ontario scores 2.3% better than Rialto
 Rialto, CAOntario, CAUnited States
 Rainfall  Unlock1638
 Snowfall0  Unlock28
 Precipitation  Unlock31106
 Sunny282  Unlock205
 Avg. July High  Unlock9286
 Avg. Jan. Low42  Unlock22
 Comfort Index (higher=better)  Unlock8.87
 UV Index5.7  Unlock4.3
 Elevation  Unlock10042443
Reviews for Rialto    7 Reviews

I have lived in Rialto my entire life, I am now 26, and I have seen substantial growth in the last 10 years. Mayor Deborah Robertson has done an excellent job making  More

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Rialto has come a long way lots of places to shop and eat catch a movie friendly people  More

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Over 17 years ago

I live in Rialto, about 1 hour outside of Los Angeles, and even though it is cheaper than Los Angeles, the average college graduate cannot afford to stay here. First,  More

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Reviews for Ontario    6 Reviews

We've lived in this area for several years. Traveling long distances to other cities for churches. Passing a quiet, unassuming church along the way for years. Until  More

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cool  More

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I think Ontario,ca us awesome because we have an entertainment Venue and large shopping mall to please everyone of all  More

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