What is the hottest day ever recorded in Dayton?

Dayton's hottest day on record reached 102°F, set on July 14, 1954. That is the single most extreme high in the nearest long-term weather station's full daily record — about 39°F hotter than a typical year's average high of 63°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 Dayton?

The all-time record high in Dayton is 102°F, recorded on July 14, 1954. 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 Dayton?

Dayton's coldest day on record bottomed out at -25°F, set on January 18, 1994. 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 Dayton?

The all-time record low in Dayton is -25°F, recorded on January 18, 1994. The gap between that and the 102°F record high — a span of 127°F — is the full range of temperatures Dayton has experienced across its long-term daily record.

Is it normal to be this hot in Dayton?

It depends on how far above Dayton's normal a given day runs. A typical year here averages a daily high near 63°F; the all-time record of 102°F (set 1954) sits about 39°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 Dayton set its temperature records?

Dayton's record high of 102°F was set in 1954 (July 14, 1954), and its record low of -25°F in 1994 (January 18, 1994). 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 Dayton been getting hotter?

Yes — Dayton'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.

Dayton, Ohio Weather Records

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

Dayton, OH · Today vs. normal

Right about normal for June

Right now it’s 84°F in Dayton — about right at the June normal high of 83°F.

Dayton’s all-time temperature records

Hottest day on record: 102°Fset July 14, 1954
Coldest day on record: -25°Fset January 18, 1994

That is a 127°F span between the hottest and coldest days Dayton has ever recorded — the full range of what its weather has done across the station’s record back to 1948.

How extreme Dayton’s weather gets

Dayton’s weather is usually mild by its own standards — a typical year averages a daily high near 63°F, and the normal high for June runs about 83°F. The records sit well outside that everyday range. The hottest day on record reached 102°F in 1954 — roughly 39°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, Dayton has bottomed out at -25°F (1994). Together the two extremes span 127°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 102°F record is the rare event the record marks.

Frequently asked

What is the hottest day ever recorded in Dayton?: Dayton's hottest day on record reached 102°F, set on July 14, 1954. That is the single most extreme high in the nearest long-term weather station's full daily record — about 39°F hotter than a typical year's average high of 63°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 Dayton?: The all-time record high in Dayton is 102°F, recorded on July 14, 1954. 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 Dayton?: Dayton's coldest day on record bottomed out at -25°F, set on January 18, 1994. 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 Dayton?: The all-time record low in Dayton is -25°F, recorded on January 18, 1994. The gap between that and the 102°F record high — a span of 127°F — is the full range of temperatures Dayton has experienced across its long-term daily record.
Is it normal to be this hot in Dayton?: It depends on how far above Dayton's normal a given day runs. A typical year here averages a daily high near 63°F; the all-time record of 102°F (set 1954) sits about 39°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 Dayton set its temperature records?: Dayton's record high of 102°F was set in 1954 (July 14, 1954), and its record low of -25°F in 1994 (January 18, 1994). 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 Dayton been getting hotter?: Yes — Dayton'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 Dayton

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