About Gresham, OR's Climate & Weather History

Gresham, in Oregon, United States, is home to roughly 111,000 people in the Pacific Time Zone at 45.5°N latitude.

In 2025, Gresham recorded an average annual temperature of 54°F — about 1.0°F below the 30-year normal of 55°F. The hottest day reached 100°F in August; the coldest was 21°F in February. Total precipitation was 64 inches (wetter than usual). The wettest month was December.