What is the hottest day ever recorded in Seattle?

Seattle's hottest day on record reached 105°F, set on July 29, 2009. That is the single most extreme high in the nearest long-term weather station's full daily record — about 43°F hotter than a typical year's average high of 62°F, which is why a day like it stands out as genuinely rare rather than just a hot afternoon.

What is the record high temperature in Seattle?

The all-time record high in Seattle is 105°F, recorded on July 29, 2009. Records are drawn from the nearest long-term weather station's full daily history, so this is the hottest single day the station has ever logged — not a typical summer peak.

What is the coldest day ever recorded in Seattle?

Seattle's coldest day on record bottomed out at 3°F, set on January 31, 1950. Like the record high, it comes from the station's complete daily record, so it captures the most extreme cold the area has recorded rather than an average winter low.

What is the record low temperature in Seattle?

The all-time record low in Seattle is 3°F, recorded on January 31, 1950. The gap between that and the 105°F record high — a span of 102°F — is the full range of temperatures Seattle has experienced across its long-term daily record.

Is it normal to be this hot in Seattle?

It depends on how far above Seattle's normal a given day runs. A typical year here averages a daily high near 62°F; the all-time record of 105°F (set 2009) sits about 43°F above that. The anomaly readout at the top of this page compares the current temperature against this month's normal high, so you can see exactly how unusual today is rather than guessing.

When did Seattle set its temperature records?

Seattle's record high of 105°F was set in 2009 (July 29, 2009), and its record low of 3°F in 1950 (January 31, 1950). Both are pulled from the station's complete daily record going back to 1948, so they reflect the true extremes rather than a recent or partial sample.

Has Seattle been getting hotter?

Yes — Seattle's annual mean temperature has trended about 1.5°F warmer since 1948, in line with the long-term warming seen across nearly every US city. That gradual shift in the average is separate from the all-time records above, which mark the single most extreme days rather than the trend, but a warming baseline is part of why recent years more often brush up against the record-high end.

Seattle, Washington Weather Records

The hottest and coldest days Seattle has ever recorded — and how today compares to normal

Seattle, WA · Today vs. normal

23°F below the June normal

Right now it’s 48°F in Seattle — about 23° below the June normal high of 71°F.

Seattle’s all-time temperature records

Hottest day on record: 105°Fset July 29, 2009
Coldest day on record: 3°Fset January 31, 1950

That is a 102°F span between the hottest and coldest days Seattle has ever recorded — the full range of what its weather has done across the station’s record back to 1948.

How extreme Seattle’s weather gets

Seattle’s weather is usually mild by its own standards — a typical year averages a daily high near 62°F, and the normal high for June runs about 71°F. The records sit well outside that everyday range. The hottest day on record reached 105°F in 2009 — roughly 43°F above a typical year’s average high, the kind of gap that turns an ordinary summer into a genuine heat event.

At the other end, Seattle has bottomed out at 3°F (1950). Together the two extremes span 102°F — the full width of what this place’s weather has done across the station’s daily record back to 1948. Those edges are exactly why the anomaly readout at the top of this page is worth a glance: it shows where today falls between the normal and the record, so a hot afternoon can be judged against the real history rather than a hunch. A reading a few degrees over the June normal is ordinary; one pushing toward the 105°F record is the rare event the record marks.

Frequently asked

What is the hottest day ever recorded in Seattle?: Seattle's hottest day on record reached 105°F, set on July 29, 2009. That is the single most extreme high in the nearest long-term weather station's full daily record — about 43°F hotter than a typical year's average high of 62°F, which is why a day like it stands out as genuinely rare rather than just a hot afternoon.
What is the record high temperature in Seattle?: The all-time record high in Seattle is 105°F, recorded on July 29, 2009. Records are drawn from the nearest long-term weather station's full daily history, so this is the hottest single day the station has ever logged — not a typical summer peak.
What is the coldest day ever recorded in Seattle?: Seattle's coldest day on record bottomed out at 3°F, set on January 31, 1950. Like the record high, it comes from the station's complete daily record, so it captures the most extreme cold the area has recorded rather than an average winter low.
What is the record low temperature in Seattle?: The all-time record low in Seattle is 3°F, recorded on January 31, 1950. The gap between that and the 105°F record high — a span of 102°F — is the full range of temperatures Seattle has experienced across its long-term daily record.
Is it normal to be this hot in Seattle?: It depends on how far above Seattle's normal a given day runs. A typical year here averages a daily high near 62°F; the all-time record of 105°F (set 2009) sits about 43°F above that. The anomaly readout at the top of this page compares the current temperature against this month's normal high, so you can see exactly how unusual today is rather than guessing.
When did Seattle set its temperature records?: Seattle's record high of 105°F was set in 2009 (July 29, 2009), and its record low of 3°F in 1950 (January 31, 1950). Both are pulled from the station's complete daily record going back to 1948, so they reflect the true extremes rather than a recent or partial sample.
Has Seattle been getting hotter?: Yes — Seattle's annual mean temperature has trended about 1.5°F warmer since 1948, in line with the long-term warming seen across nearly every US city. That gradual shift in the average is separate from the all-time records above, which mark the single most extreme days rather than the trend, but a warming baseline is part of why recent years more often brush up against the record-high end.

More for Seattle

See the full Seattle, WA weather forecast — hour-by-hour outlook, NOAA radar, satellite, and air quality — or the broader Seattle climate & weather by month for the long-run averages behind these records.