46.844°N, 92.187°W · station DLHthr · 1874–2026 · 153 years of record
The Almanac Ribbon
Every day of the year at Duluth: 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 106°F · coldest ever -41°F
Records by Month
Month
Record high
Record low
Jan
55°Jan 22, 1942
-41°Jan 2, 1885
Feb
58°Feb 26, 1895
-39°Feb 2, 1996
Mar
81°Mar 28, 1946
-29°Mar 2, 1989
Apr
88°Apr 27, 1952
-5°Apr 3, 1954
May
95°May 30, 1939
16°May 3, 1907
Jun
97°Jun 28, 1910
27°Jun 10, 1972
Jul
106°Jul 13, 1936
35°Jul 1, 1988
Aug
97°Aug 1, 1930
32°Aug 27, 1986
Sep
97°Sep 3, 2023
23°Sep 20, 1962
Oct
86°Oct 2, 1953
6°Oct 27, 1917
Nov
75°Nov 6, 2020
-29°Nov 29, 1875
Dec
56°Dec 6, 1939
-35°Dec 28, 1917
All-time
106°Jul 13, 1936
-41°Jan 2, 1885
Longest-Standing Records
The daily records that have held the longest — set in the earliest years and never beaten since. Highs power Duluth on hottestsince.com; lows on coldestsince.com.
Oldest-standing record highs
Date
Record
Set
Standing
Jul 24
89°
1874
152yrs
May 23
84°
1875
151yrs
Jan 17
45°
1876
150yrs
May 28
87°
1876
150yrs
Jan 26
47°
1877
149yrs
Jan 28
51°
1877
149yrs
Jan 29
46°
1877
149yrs
Feb 9
46°
1877
149yrs
Feb 20
54°
1877
149yrs
Feb 21
57°
1877
149yrs
Dec 22
48°
1877
149yrs
Dec 27
40°
1877
149yrs
Oldest-standing record lows
Date
Record
Set
Standing
Jan 9
-38°
1875
151yrs
Feb 12
-33°
1875
151yrs
Mar 18
-26°
1875
151yrs
Mar 21
-12°
1875
151yrs
Apr 15
4°
1875
151yrs
Nov 20
-12°
1875
151yrs
Nov 27
-16°
1875
151yrs
Nov 28
-29°
1875
151yrs
Jun 18
36°
1876
150yrs
Dec 9
-30°
1876
150yrs
Dec 16
-28°
1876
150yrs
Oct 30
8°
1878
148yrs
All-Time Extremes
Hottest ever
106°F
1936-07-13
Coldest ever
-41°F
1885-01-02
Longest heat streak
7 days
≥ 90°F · ended 1936-07-13
The Warming Trend
Duluth's annual mean temperature, each year a stripe — blue below the 1991–2020 average, red above.
Days Above / Below the Mark
4 days ≥90°F in 2026 · normal 2 · record 14 in 1936
115 days ≤32°F in 2026 · normal 176 · record 206 in 1907
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.