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Upland, CA Climate
1991 to 2020 normals at Ontario INTL AP, 5.5 mi from the center of Upland, elevation 949 ft.
Average weather by month
Select a month for daily normals and last year's weather
Frequently asked questions
- What is the hottest month in Upland, CA?
- August is the warmest month, with a normal high of 95°F at Ontario INTL AP.
- What is the coldest month in Upland, CA?
- December is the coldest month, with a normal low of 44°F.
- What is the wettest month in Upland, CA?
- February has the most precipitation on average, about 3.07 inches.