What is the hottest day ever recorded in Dallas?

Dallas's hottest day on record reached 112°F, set on June 26, 1980. That is the single most extreme high in the nearest long-term weather station's full daily record — about 34°F hotter than a typical year's average high of 78°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 Dallas?

The all-time record high in Dallas is 112°F, recorded on June 26, 1980. 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 Dallas?

Dallas's coldest day on record bottomed out at 0°F, set on January 23, 1940. Like the record high, it comes from the station's full 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 Dallas?

The all-time record low in Dallas is 0°F, recorded on January 23, 1940. The gap between that and the 112°F record high — a span of 112°F — is the full range of temperatures Dallas has experienced across its long-term daily record.

Is it normal to be this hot in Dallas?

It depends on how far above Dallas's normal a given day runs. A typical year here averages a daily high near 78°F; the all-time record of 112°F (set 1980) sits about 34°F above that. When a live reading is available, the live readout just below the record high and low compares it with the temperature typical for that hour this month (estimated from the month's normal high and low), so you can see how unusual the day is rather than guessing.

When did Dallas set its temperature records?

Dallas's record high of 112°F was set in 1980 (June 26, 1980), and its record low of 0°F in 1940 (January 23, 1940). Both are pulled from the station's full daily record going back to 1939, so they reflect the true extremes rather than a recent or partial sample.

Has Dallas been getting hotter?

Yes — Dallas's annual mean temperature has trended about 3.4°F warmer since 1940 (+0.40°F per decade, fitted to the complete years of 1940–2025). 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.

Dallas, Texas Weather Records

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

Dallas’s all-time temperature records

Hottest day on record: 112°Fset June 26, 1980
Coldest day on record: 0°Fset January 23, 1940

That is a 112°F span between the hottest and coldest days Dallas has ever recorded — the full range of what its weather has done across the station’s record back to 1939.

Dallas, TX · Today vs. normal

6°F above typical for 9:15 AM on Sep 21

At 9:15 AM CDT on Sep 21 it was 80°F in Dallas — 6° above the 74°F typical for that hour (estimated from the Sep 21 normal high of 88°F and low of 68°F, interpolated from the monthly normals).

How extreme Dallas’s weather gets

Dallas’s weather is usually mild by its own standards — a typical year averages a daily high near 78°F, and the normal high for September runs about 90°F. The records sit well outside that everyday range. The hottest day on record reached 112°F in 1980 — roughly 34°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, Dallas has bottomed out at 0°F (1940). Those edges are why the today-versus-normal readout above 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 September normal is ordinary; one pushing toward the 112°F record is the rare event the record marks.

Frequently asked

What is the hottest day ever recorded in Dallas?: Dallas's hottest day on record reached 112°F, set on June 26, 1980. That is the single most extreme high in the nearest long-term weather station's full daily record — about 34°F hotter than a typical year's average high of 78°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 Dallas?: The all-time record high in Dallas is 112°F, recorded on June 26, 1980. 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 Dallas?: Dallas's coldest day on record bottomed out at 0°F, set on January 23, 1940. Like the record high, it comes from the station's full 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 Dallas?: The all-time record low in Dallas is 0°F, recorded on January 23, 1940. The gap between that and the 112°F record high — a span of 112°F — is the full range of temperatures Dallas has experienced across its long-term daily record.
Is it normal to be this hot in Dallas?: It depends on how far above Dallas's normal a given day runs. A typical year here averages a daily high near 78°F; the all-time record of 112°F (set 1980) sits about 34°F above that. When a live reading is available, the live readout just below the record high and low compares it with the temperature typical for that hour this month (estimated from the month's normal high and low), so you can see how unusual the day is rather than guessing.
When did Dallas set its temperature records?: Dallas's record high of 112°F was set in 1980 (June 26, 1980), and its record low of 0°F in 1940 (January 23, 1940). Both are pulled from the station's full daily record going back to 1939, so they reflect the true extremes rather than a recent or partial sample.
Has Dallas been getting hotter?: Yes — Dallas's annual mean temperature has trended about 3.4°F warmer since 1940 (+0.40°F per decade, fitted to the complete years of 1940–2025). 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.