Weather on October 21
Duluth, MN
55 Years of Data
Avg High
51°F
Avg Low
38°F
Warmest
2017
61°F avg
Coldest
1981
32°F avg
About This Date
October 21st in Duluth, MN typically brings cool fall weather, with average highs around 51°F and lows near 38°F. Over 55 years of records, the warmest October 21st was in 2017 (61°F average), while the coldest was 1981 (32°F) — a 29°F range across recorded history. Rain or other precipitation has occurred on about 16% of October 21st dates historically, with the wettest October 21st recording 3.38" of rain. The last decade has been 3.3°F warmer on this date compared to 20-30 years ago.
The last decade has been 3.3°F warmer on this date compared to 20-30 years ago.
Planning for October 21st in Duluth, MN? Bring layers as temperatures can vary throughout the day.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 48° | 43° | 45° | — | — |
| 2024 | 60° | 51° | 56° | — | — |
| 2023 | 50° | 45° | 47° | 0.25" | — |
| 2022 | 66° | 46° | 56° | — | — |
| 2021 | 50° | 38° | 44° | — | — |
| 2020 | 39° | 32° | 36° | — | — |
| 2019 | 49° | 46° | 47° | 2.92" | — |
| 2018 | 57° | 24° | 41° | — | — |
| 2017warmest | 67° | 56° | 61° | 0.97" | — |
| 2016 | 51° | 37° | 44° | — | — |
| 2015 | 53° | 39° | 46° | — | — |
| 2014 | 47° | 37° | 42° | — | — |
| 2013 | 38° | 32° | 35° | — | — |
| 2012 | 47° | 36° | 41° | — | — |
| 2011 | 58° | 28° | 43° | — | — |
| 2010 | 51° | 35° | 43° | — | — |
| 2009 | 46° | 38° | 42° | 3.38" | — |
| 2008 | 49° | 32° | 40° | — | — |
| 2007 | 65° | 44° | 54° | 0.03" | — |
| 2006 | 39° | 32° | 36° | — | — |
| 2005 | 47° | 33° | 40° | — | — |
| 2004 | 51° | 43° | 47° | — | — |
| 2003 | 72° | 29° | 50° | — | — |
| 2002 | 37° | 28° | 33° | — | — |
| 2001 | 58° | 33° | 45° | — | — |
| 2000 | 64° | 41° | 53° | — | — |
| 1999 | 49° | 30° | 39° | — | — |
| 1998 | 53° | 37° | 45° | — | — |
| 1997 | 48° | 36° | 42° | — | — |
| 1996 | 53° | 46° | 50° | — | — |
| 1995 | 41° | 32° | 37° | — | — |
| 1994 | 54° | 45° | 49° | — | — |
| 1993 | 47° | 33° | 40° | — | — |
| 1992 | 49° | 39° | 44° | — | — |
| 1991 | 46° | 34° | 40° | — | — |
| 1990 | 44° | 38° | 41° | — | — |
| 1989 | 47° | 34° | 40° | — | — |
| 1988 | 45° | 37° | 41° | — | — |
| 1987 | 41° | 34° | 37° | — | — |
| 1986 | 62° | 43° | 52° | — | — |
| 1985 | 50° | 40° | 45° | — | — |
| 1984 | 46° | 41° | 44° | — | — |
| 1983 | 48° | 42° | 45° | — | — |
| 1982 | 43° | 35° | 39° | — | — |
| 1981coldest | 34° | 30° | 32° | — | — |
| 1980 | 49° | 41° | 45° | — | — |
| 1979 | 57° | 40° | 48° | 0.76" | — |
| 1978 | 67° | 51° | 59° | — | — |
| 1977 | 62° | 39° | 51° | — | — |
| 1976 | 38° | 32° | 35° | 0.03" | — |
| 1975 | 59° | 50° | 55° | — | — |
| 1974 | 62° | 38° | 50° | — | — |
| 1973 | 55° | 40° | 47° | — | — |
| 1972 | 45° | 37° | 41° | 0.08" | — |
| 1971 | 52° | 49° | 50° | 0.86" | — |
55 years of data from DULUTH HARBOR STN