Weather on March 21
Duluth, MN
55 Years of Data
Avg High
37°F
Avg Low
24°F
Warmest
2021
55°F avg
Coldest
2002
13°F avg
About This Date
March 21st in Duluth, MN typically brings cold spring weather, with average highs around 37°F and lows near 24°F. Over 56 years of records, the warmest March 21st was in 2021 (55°F average), while the coldest was 2002 (13°F) — a 42°F range across recorded history. Precipitation has occurred on 11% of recorded March 21st dates, with snow falling 4% of the time (heaviest snowfall: 4.2"). The last decade has been 5.1°F warmer on this date compared to 20-30 years ago.
The last decade has been 5.1°F warmer on this date compared to 20-30 years ago.
Planning for March 21st in Duluth, MN? Bundle up with warm layers and protect extremities from the cold.
Warming Trend
0.8°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026 | 36° | 32° | 34° | — | — |
| 2025 | 45° | 20° | 32° | — | — |
| 2024 | 33° | 17° | 25° | — | — |
| 2023 | 31° | 21° | 26° | — | — |
| 2022 | 36° | 33° | 34° | — | — |
| 2021warmest | 64° | 47° | 55° | — | — |
| 2020 | 31° | 13° | 22° | — | — |
| 2019 | 57° | 33° | 45° | — | — |
| 2018 | 30° | 15° | 23° | — | — |
| 2017 | 43° | 24° | 33° | — | — |
| 2016 | 35° | 27° | 31° | — | — |
| 2015 | 32° | 17° | 25° | — | — |
| 2014 | 34° | 6° | 20° | 0.43" | 4.2" |
| 2013 | 31° | 5° | 18° | — | — |
| 2012 | 56° | 39° | 47° | 0.41" | — |
| 2011 | 45° | 34° | 39° | — | — |
| 2010 | 56° | 26° | 41° | — | — |
| 2009 | 36° | 21° | 28° | — | — |
| 2008 | 30° | 26° | 28° | — | — |
| 2007 | 44° | 35° | 40° | 0.28" | — |
| 2006 | 32° | 25° | 28° | — | — |
| 2005 | 33° | 15° | 24° | — | — |
| 2004 | 33° | 14° | 24° | — | — |
| 2003 | 36° | 29° | 32° | — | — |
| 2002coldest | 24° | 2° | 13° | — | — |
| 2001 | 48° | 28° | 38° | — | — |
| 2000 | 37° | 33° | 35° | — | — |
| 1999 | 40° | 28° | 34° | — | — |
| 1998 | 35° | 22° | 28° | — | — |
| 1997 | 33° | 24° | 29° | — | — |
| 1996 | 25° | 13° | 19° | — | — |
| 1995 | 44° | 33° | 39° | — | — |
| 1994 | 51° | 30° | 41° | — | — |
| 1993 | 32° | 20° | 26° | — | — |
| 1992 | 36° | 22° | 29° | — | — |
| 1991 | 38° | 32° | 35° | — | — |
| 1990 | 31° | 29° | 30° | — | — |
| 1989 | 27° | 3° | 15° | — | — |
| 1988 | 32° | 29° | 30° | — | — |
| 1987 | 38° | 35° | 36° | — | — |
| 1986 | 40° | 13° | 26° | — | — |
| 1985 | 43° | 24° | 33° | — | — |
| 1984 | 42° | 33° | 38° | — | — |
| 1983 | 24° | 16° | 20° | — | — |
| 1982 | 45° | 28° | 36° | — | — |
| 1981 | 40° | 31° | 35° | — | — |
| 1980 | 31° | 19° | 25° | — | — |
| 1979 | 39° | 29° | 34° | — | — |
| 1978 | 43° | 29° | 36° | — | — |
| 1977 | 30° | 13° | 21° | — | — |
| 1976 | 21° | 15° | 18° | — | — |
| 1975 | 35° | 30° | 33° | 0.05" | — |
| 1974 | 21° | 8° | 15° | — | — |
| 1973 | 36° | 20° | 28° | — | — |
| 1972 | 39° | 30° | 35° | 1.78" | — |
| 1971 | 35° | 25° | 30° | 0.13" | 0.5" |
56 years of data from DULUTH HARBOR STN