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Earliest and Latest Days of 100° F in Seattle
This is a list of the earliest and latest days in the year with a high temperature of at least 100 °F in
Seattle, Washington
history. It is based on NOAA data from the years 1894–2024.
Also see:
Longest streaks of 100°
Years with most 100° days
Change city
Change temperature
Earliest 100 degree day in Seattle?
The earliest in the year that Seattle, Washington had a high temperature of at least 100 °F is
June 26
which happened in 2021.
Latest 100 degree day in Seattle?
The latest in the year that Seattle, Washington had a high temperature of at least 100 °F is
July 29
which happened in 2009.
Earliest Days ≥ 100 °F
Date
Year
Temperature
June 26
2021
102 °F
June 27
2021
104 °F
June 28
2021
108 °F
July 16
1941
100 °F
July 20
1994
100 °F
July 29
2009
103 °F
Latest Days ≥ 100 °F
Date
Year
Temperature
July 29
2009
103 °F
July 20
1994
100 °F
July 16
1941
100 °F
June 28
2021
108 °F
June 27
2021
104 °F
June 26
2021
102 °F