Irwindale, in California, United States, is home to roughly 1,400 people in the Pacific Time Zone at 34.1°N latitude.
In 2025, Irwindale recorded an average annual temperature of 65°F — about 1.6°F below the 30-year normal of 66°F. The hottest day reached 104°F in August; the coldest was 34°F in March. Total precipitation was 35 inches (wetter than usual). The wettest month was November.
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