What is the hottest day ever recorded in Hartford?

Hartford's hottest day on record reached 103°F, set on August 9, 2001. That is the single most extreme high in the nearest long-term weather station's full daily record — about 42°F hotter than a typical year's average high of 61°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 Hartford?

The all-time record high in Hartford is 103°F, recorded on August 9, 2001. 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 Hartford?

Hartford's coldest day on record bottomed out at -24°F, set on February 16, 1943. 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 Hartford?

The all-time record low in Hartford is -24°F, recorded on February 16, 1943. The gap between that and the 103°F record high — a span of 127°F — is the full range of temperatures Hartford has experienced across its long-term daily record.

Is it normal to be this hot in Hartford?

It depends on how far above Hartford's normal a given day runs. A typical year here averages a daily high near 61°F; the all-time record of 103°F (set 2001) sits about 42°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 Hartford set its temperature records?

Hartford's record high of 103°F was set in 2001 (August 9, 2001), and its record low of -24°F in 1943 (February 16, 1943). Both are pulled from the station's full daily record going back to 1920, so they reflect the true extremes rather than a recent or partial sample.

Has Hartford been getting hotter?

Yes — Hartford's annual mean temperature has trended about 3.5°F warmer since 1920 (+0.33°F per decade, fitted to the complete years of 1920–2025). 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.

Hartford, Connecticut Weather Records

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

Hartford’s all-time temperature records

Hottest day on record: 103°Fset August 9, 2001
Coldest day on record: -24°Fset February 16, 1943

That is a 127°F span between the hottest and coldest days Hartford has ever recorded — the full range of what its weather has done across the station’s record back to 1920.

Hartford, CT · Today vs. normal

About typical for 1:00 AM on Sep 21

At 1:00 AM EDT on Sep 21 it was 58°F in Hartford — about the 59°F typical for that hour (estimated from the Sep 21 normal high of 73°F and low of 54°F, interpolated from the monthly normals).

How extreme Hartford’s weather gets

Hartford’s weather is usually mild by its own standards — a typical year averages a daily high near 61°F, and the normal high for September runs about 76°F. The records sit well outside that everyday range. The hottest day on record reached 103°F in 2001 — roughly 42°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, Hartford has bottomed out at -24°F (1943). 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 103°F record is the rare event the record marks.

Frequently asked

What is the hottest day ever recorded in Hartford?: Hartford's hottest day on record reached 103°F, set on August 9, 2001. That is the single most extreme high in the nearest long-term weather station's full daily record — about 42°F hotter than a typical year's average high of 61°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 Hartford?: The all-time record high in Hartford is 103°F, recorded on August 9, 2001. 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 Hartford?: Hartford's coldest day on record bottomed out at -24°F, set on February 16, 1943. 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 Hartford?: The all-time record low in Hartford is -24°F, recorded on February 16, 1943. The gap between that and the 103°F record high — a span of 127°F — is the full range of temperatures Hartford has experienced across its long-term daily record.
Is it normal to be this hot in Hartford?: It depends on how far above Hartford's normal a given day runs. A typical year here averages a daily high near 61°F; the all-time record of 103°F (set 2001) sits about 42°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 Hartford set its temperature records?: Hartford's record high of 103°F was set in 2001 (August 9, 2001), and its record low of -24°F in 1943 (February 16, 1943). Both are pulled from the station's full daily record going back to 1920, so they reflect the true extremes rather than a recent or partial sample.
Has Hartford been getting hotter?: Yes — Hartford's annual mean temperature has trended about 3.5°F warmer since 1920 (+0.33°F per decade, fitted to the complete years of 1920–2025). 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.