Key West, FL
Florida · Records since 1872–2026
Records for September 26
🔥 Record High
September 26, 1987
+4° from 88° normal❄ Record Low
September 26, 1901
-9° from 79° normalAll-Time Records — Key West
First & Last Dates — Key West
How early and how late each seasonal turning point has ever arrived, across the full period of record
Top 10 Record Highs — September 26
| # | Temp | Date |
|---|---|---|
| 🏆 | 92°F | September 26, 1987 |
| 2 | 92°F | September 26, 1955 |
| 3 | 92°F | September 26, 1951 |
| 4 | 91°F | September 26, 2021 |
| 5 | 91°F | September 26, 2020 |
| 6 | 91°F | September 26, 2018 |
| 7 | 91°F | September 26, 2009 |
| 8 | 91°F | September 26, 1993 |
| 9 | 91°F | September 26, 1960 |
| 10 | 91°F | September 26, 1957 |
Top 5 Record Lows — September 26
| # | Temp | Date |
|---|---|---|
| 🥶 | 70°F | September 26, 1901 |
| 2 | 71°F | September 26, 1966 |
| 3 | 72°F | September 26, 1982 |
| 4 | 72°F | September 26, 1948 |
| 5 | 72°F | September 26, 1920 |
Heat Wave Summary — Key West
threshold: 92°F (90th percentile of historical Jun–Aug highs)Days ≥ 90°F Per Year
1872–2026Average Daily High by Decade
Full year · complete decades only
Longest Heat Waves — Key West
| # | Dates | Days | Peak | Avg High | Avg Overnight Low |
|---|---|---|---|---|---|
| 🏆 | Aug 3, 1956 – Sep 2, 1956 | 31 | 97°F (Aug 26) | 94°F | 79°F |
| 2 | Jun 26, 1957 – Jul 14, 1957 | 19 | 95°F (Jul 2) | 94°F | 80°F |
| 3 | Aug 9, 1957 – Aug 27, 1957 | 19 | 95°F (Aug 12) | 93°F | 78°F |
| 4 | Jul 26, 1990 – Aug 8, 1990 | 14 | 94°F (Jul 26) | 93°F | 79°F |
| 5 | Jul 30, 2007 – Aug 12, 2007 | 14 | 94°F (Aug 6) | 93°F | 83°F |
| 6 | Jun 24, 1881 – Jul 6, 1881 | 13 | 96°F (Jul 2) | 93°F | 81°F |
| 7 | Jul 24, 1883 – Aug 5, 1883 | 13 | 95°F (Aug 2) | 93°F | 80°F |
| 8 | Jul 22, 1884 – Aug 3, 1884 | 13 | 95°F (Aug 1) | 93°F | 80°F |
| 9 | Aug 9, 1954 – Aug 21, 1954 | 13 | 95°F (Aug 10) | 93°F | 79°F |
| 10 | Aug 9, 1991 – Aug 21, 1991 | 13 | 93°F (Aug 9) | 92°F | 80°F |
Heat Waves Per Year
Warm Summer Nights (Jun–Aug)
Nights where the overnight low exceeded the 1991–2020 normal low
Above-Normal Summer Nights Per Year
Average June–August Low by Decade
Overnight lows · complete decades only
Precipitation
Annual totals and trend across the full period of record · see this year's standing →
Monthly Precipitation — Last 24 Months
Blue = actual · dashed line = monthly normal
Annual Precipitation Per Year (1871–2026)
Blue = above average · tan = below average · gold = 2026 (partial)
Since 1871, annual totals have trended
+0.15" per decade,
about +2.4"
across the record.
Heavy Rain Days Per Year (≥ 1.0")
Compare year-to-year changes in days with heavy rainfall (≥ 1.0")
This Year — 2026
How Key West is tracking against normal, year to date
Daily High Temperature vs Normal
142 of 267 days with data were above the 1991–2020 normal high for their date.
Precipitation, Year to Date
Accumulation vs. Normal
Running total since Jan 1 against the normal pace for the same date · Key West is 4.07" behind the normal pace
Period Review — Sep 1 – Sep 25, 2026
Any window, evaluated against every other year on record — 25 days
Average Temperature by Year — Sep 1 – Sep 25
1872–2026 · 2026 highlighted · trend +0.13° per decade (warming since 1872)
Precipitation by Year — Sep 1 – Sep 25
1871–2025 · 2026 highlighted · trend -0.05" per decade (drier since 1871)
Warmest Sep 1 – Sep 25 on Record
| # | Year | Avg Temp |
|---|---|---|
| 1 | 2024 | 86.4°F |
| 2 | 2023 | 85.8°F |
| 3 | 1951 | 85.6°F |
| 4 | 1877 | 85.6°F |
| 5 | 2020 | 85.6°F |
| 6 | 2018 | 85.5°F |
| 7 | 2007 | 85.4°F |
| 8 | 2011 | 85.3°F |
| 9 | 1989 | 85.3°F |
| 10 | 1987 | 85.2°F |
Coolest Sep 1 – Sep 25 on Record
| # | Year | Avg Temp |
|---|---|---|
| 1 | 1890 | 80.3°F |
| 2 | 1887 | 80.7°F |
| 3 | 1897 | 80.8°F |
| 4 | 1909 | 81.1°F |
| 5 | 1889 | 81.2°F |
| 6 | 1894 | 81.3°F |
| 7 | 1900 | 81.4°F |
| 8 | 1910 | 81.4°F |
| 9 | 1913 | 81.4°F |
| 10 | 1891 | 81.5°F |