24.557°N, 81.755°W · station EYWthr · 1872–2026 · 155 years of record
The Almanac Ribbon
Every day of the year at Key West: the record high and record low ever set (outer lines), the everyday normal range (shaded band), and the full record envelope behind it.
Record highRecord lowNormal high–low band (1991–2020)hottest ever 97°F · coldest ever 41°F
Records by Month
Month
Record high
Record low
Jan
90°Jan 16, 1877
41°Jan 12, 1886
Feb
87°Feb 25, 1874
44°Feb 14, 1899
Mar
89°Mar 25, 1873
47°Mar 3, 1986
Apr
91°Apr 27, 1881
48°Apr 2, 1987
May
94°May 14, 2019
63°May 2, 1877
Jun
96°Jun 6, 1881
65°Jun 2, 1932
Jul
97°Jul 19, 1880
68°Jul 16, 1888
Aug
97°Aug 26, 1956
68°Aug 4, 1894
Sep
95°Sep 14, 1872
69°Sep 27, 1892
Oct
93°Oct 5, 1962
59°Oct 29, 1892
Nov
91°Nov 3, 1876
49°Nov 30, 1959
Dec
88°Dec 23, 1876
44°Dec 2, 1876
All-time
97°Jul 19, 1880
41°Jan 12, 1886
Longest-Standing Records
The daily records that have held the longest — set in the earliest years and never beaten since. Highs power Key West on hottestsince.com; lows on coldestsince.com.
Oldest-standing record highs
Date
Record
Set
Standing
Jul 29
95°
1872
154yrs
Sep 14
95°
1872
154yrs
Sep 15
94°
1872
154yrs
Sep 16
94°
1872
154yrs
Sep 18
92°
1872
154yrs
Sep 23
92°
1872
154yrs
Sep 29
92°
1872
154yrs
Oct 23
89°
1872
154yrs
Nov 7
87°
1872
154yrs
Nov 26
85°
1872
154yrs
Mar 24
89°
1873
153yrs
Apr 27
90°
1873
153yrs
Oldest-standing record lows
Date
Record
Set
Standing
Aug 21
72°
1873
153yrs
Sep 6
70°
1873
153yrs
Oct 6
70°
1873
153yrs
Oct 7
65°
1873
153yrs
Nov 19
54°
1873
153yrs
Nov 20
52°
1873
153yrs
Apr 24
66°
1875
151yrs
Oct 3
65°
1876
150yrs
Dec 1
45°
1876
150yrs
Dec 2
44°
1876
150yrs
Dec 3
45°
1876
150yrs
Dec 4
46°
1876
150yrs
All-Time Extremes
Hottest ever
97°F
1880-07-19
Coldest ever
41°F
1886-01-12
Longest heat streak
75 days
≥ 90°F · ended 1957-08-27
The Warming Trend
Key West's annual mean temperature, each year a stripe — blue below the 1991–2020 average, red above.
Days Above / Below the Mark
66 days ≥90°F in 2026 · normal 44 · record 116 in 1957
0 days ≤32°F in 2026 · normal 0 · record 0 in 1872
The Full Record
Every day of the year, record and normal high & low with the year each record was set. Type to filter, click a column to sort.