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

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Highlights
- Altadena has 56.3% more rainy days than Rialto.
- Altadena has 1.8% more Sunny Days than Rialto.
- On the BestPlaces comfort index, Altadena scores 5.8% better than Rialto
 Rialto, CAAltadena, CAUnited States
 Rainfall  Unlock2338
 Snowfall0  Unlock28
 Precipitation  Unlock37106
 Sunny282  Unlock205
 Avg. July High  Unlock8686
 Avg. Jan. Low42  Unlock22
 Comfort Index (higher=better)  Unlock9.17
 UV Index5.7  Unlock4.3
 Elevation  Unlock13582443
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 Altadena    1 Reviews

I live just above the 1500 foot elevation at the edge of the San Gabriel Mountains in the L.A. suburb of Altadena--just above Pasadena. We're above the low morning fog  More

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