Highest Daily Low Temperatures in Winthrop History

This is a list of the hottest daily low temperatures ever recorded in Winthrop, Washington history from 1906–2024 based on data from the NOAA.

Highest temperatures all-time

Record for the highest daily low temperature in Winthrop

The highest low temperature for a calendar day in Winthrop, Washington history was 78 °F which happened on Monday, July 16, 1906.

Rank	Temperature	Date
1	78 °F	July 16, 1906
2	75 °F	July 17, 1906
3	73 °F	July 10, 1930
4	72 °F	July 25, 1927
4	72 °F	August 1, 1919
6	71 °F	August 16, 2003
6	71 °F	August 20, 1942
6	71 °F	July 22, 1930
6	71 °F	July 3, 1924
6	71 °F	August 14, 1917
6	71 °F	July 7, 1906
12	70 °F	July 2, 1924
12	70 °F	July 6, 1906
14	69 °F	July 2, 2021
14	69 °F	July 8, 1930
14	69 °F	August 27, 1917
14	69 °F	August 26, 1917
18	68 °F	August 1, 2021
18	68 °F	July 1, 2021
18	68 °F	June 25, 1992
18	68 °F	July 28, 1939
18	68 °F	July 25, 1937
18	68 °F	July 13, 1930
18	68 °F	August 17, 1917
18	68 °F	July 31, 1912
18	68 °F	August 3, 1910