Harper Weather Forecast

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Last Updated: December 12, 2025

Harper is a small town located in Malheur County, Oregon, with a population of around 500 people.


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Summary

The climate in Harper is semi-arid, with hot summers and cold winters. The area receives around 10 inches of rainfall annually, with snowfall being fairly uncommon. The hydrology in this region is mainly comprised of the Malheur River, which runs nearby and provides a source of water for local agriculture. Outdoor recreation opportunities in Harper and its surrounding areas include hunting, fishing, hiking, and camping. The nearby Malheur National Wildlife Refuge offers opportunities for bird watching and wildlife viewing. The region is home to a diverse array of flora and fauna, making it a popular destination for nature enthusiasts.

       

Weather Forecast

Harper receives approximately 285mm of rain per year, with humidity levels near 77% and air temperatures averaging around 10°C. Harper has a plant hardyness factor of 6, meaning plants and agriculture in this region thrive during a short period during spring and early summer. Most plants will die off during the colder winter months.