August is the hottest month in Rancho Cucamonga with an average temperature of 25°C (76°F) and the coldest is January at 13°C (55°F) with the most daily sunshine hours at 13 in August. The wettest month is January with an average of 50.4mm of rain. The best month to swim in the sea is in August when the average sea temperature is 21°C (69°F).
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Sunrise 06:52
Sunset 16:45
Sunrise 06:52
Sunset 16:45