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ZIP 91701 · Rancho Cucamonga, California

Current conditions and the National Weather Service 7-day forecast for ZIP code 91701, Rancho Cucamonga, California — temperature, rain chance, wind, radar and alerts.

Saturday Aug 29 night: a low around 69°F. Sunday Aug 30: a high near 92°F and a low around 64°F. The wettest day looks like Tuesday Sep 1, near 0.01 in. Highs over the period run 86°F to 92°F.

National Weather Service forecast for ZIP 91701, Rancho Cucamonga, California
DayHighLowPrecip
Saturday Aug 2969°
Sunday Aug 3092°64°
Monday Aug 3188°62°
Tuesday Sep 186°63°0.01 in
Wednesday Sep 286°64°
Thursday Sep 388°64°
Friday Sep 490°66°
Saturday Sep 592°

NOAA NWS NDFD 2.5 km, run 2026-08-30 00:00 UTC · days are local time in America/Los Angeles. The live page updates continuously.

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