What is the hottest day ever recorded in Jacksonville?

Jacksonville's hottest day on record reached 104°F, set on June 19, 1998. That is the single most extreme high in the nearest long-term weather station's full daily record — about 24°F hotter than a typical year's average high of 80°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 Jacksonville?

The all-time record high in Jacksonville is 104°F, recorded on June 19, 1998. 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 Jacksonville?

Jacksonville's coldest day on record bottomed out at 9°F, set on January 21, 1985. 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 Jacksonville?

The all-time record low in Jacksonville is 9°F, recorded on January 21, 1985. The gap between that and the 104°F record high — a span of 95°F — is the full range of temperatures Jacksonville has experienced across its long-term daily record.

Is it normal to be this hot in Jacksonville?

It depends on how far above Jacksonville's normal a given day runs. A typical year here averages a daily high near 80°F; the all-time record of 104°F (set 1998) sits about 24°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 Jacksonville set its temperature records?

Jacksonville's record high of 104°F was set in 1998 (June 19, 1998), and its record low of 9°F in 1985 (January 21, 1985). Both are pulled from the station's full daily record going back to 1945, so they reflect the true extremes rather than a recent or partial sample.

Has Jacksonville been getting hotter?

Yes — Jacksonville's annual mean temperature has trended about 2.8°F warmer since 1946 (+0.36°F per decade, fitted to the complete years of 1946–2025). 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.

Jacksonville, Florida Weather Records

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

Jacksonville’s all-time temperature records

Hottest day on record: 104°Fset June 19, 1998
Coldest day on record: 9°Fset January 21, 1985

That is a 95°F span between the hottest and coldest days Jacksonville has ever recorded — the full range of what its weather has done across the station’s record back to 1945.

Jacksonville, FL · Today vs. normal

2°F below typical for 12:30 AM on Sep 21

At 12:30 AM EDT on Sep 21 it was 75°F in Jacksonville — 2° below the 77°F typical for that hour (estimated from the Sep 21 normal high of 87°F and low of 72°F, interpolated from the monthly normals).

How extreme Jacksonville’s weather gets

Jacksonville’s weather is usually mild by its own standards — a typical year averages a daily high near 80°F, and the normal high for September runs about 88°F. The records sit well outside that everyday range. The hottest day on record reached 104°F in 1998 — roughly 24°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, Jacksonville has bottomed out at 9°F (1985). 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 104°F record is the rare event the record marks.

Frequently asked

What is the hottest day ever recorded in Jacksonville?: Jacksonville's hottest day on record reached 104°F, set on June 19, 1998. That is the single most extreme high in the nearest long-term weather station's full daily record — about 24°F hotter than a typical year's average high of 80°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 Jacksonville?: The all-time record high in Jacksonville is 104°F, recorded on June 19, 1998. 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 Jacksonville?: Jacksonville's coldest day on record bottomed out at 9°F, set on January 21, 1985. 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 Jacksonville?: The all-time record low in Jacksonville is 9°F, recorded on January 21, 1985. The gap between that and the 104°F record high — a span of 95°F — is the full range of temperatures Jacksonville has experienced across its long-term daily record.
Is it normal to be this hot in Jacksonville?: It depends on how far above Jacksonville's normal a given day runs. A typical year here averages a daily high near 80°F; the all-time record of 104°F (set 1998) sits about 24°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 Jacksonville set its temperature records?: Jacksonville's record high of 104°F was set in 1998 (June 19, 1998), and its record low of 9°F in 1985 (January 21, 1985). Both are pulled from the station's full daily record going back to 1945, so they reflect the true extremes rather than a recent or partial sample.
Has Jacksonville been getting hotter?: Yes — Jacksonville's annual mean temperature has trended about 2.8°F warmer since 1946 (+0.36°F per decade, fitted to the complete years of 1946–2025). 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.