Winthrop Average Temperature by Month

This page shows the average temperature in each month of the year in Winthrop, Washington. It is based on NOAA data for the years 1991–2020.
What's the Hottest Month in Winthrop?
In Winthrop, Washington, the warmest month is July, with an average daily high temperature of 86.3 °F and an average low of 51.4 °F.
What's the Coldest Month in Winthrop?
In Winthrop, Washington, the coolest month is January, with an average daily high temperature of 30.4 °F and an average low of 15.9 °F.
Month Avg. High Avg. Low
January 30.4 °F 15.9 °F
February 38.9 °F 18.6 °F
March 50.5 °F 26.0 °F
April 61.7 °F 32.7 °F
May 71.6 °F 40.3 °F
June 77.2 °F 46.5 °F
July 86.3 °F 51.4 °F
August 86.1 °F 49.8 °F
September 77.5 °F 41.7 °F
October 61.6 °F 32.5 °F
November 41.7 °F 25.0 °F
December 29.7 °F 16.0 °F
Year 59.5 °F 33.0 °F
Weather Station Details
Years Station Coordinates
1906–2024 Winthrop 1 WSW location
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