Weather on August 31
Duluth, MN
55 Years of Data
Avg High
70°F
Avg Low
55°F
Warmest
2010
76°F avg
Coldest
2002
47°F avg
About This Date
August 31st in Duluth, MN typically brings pleasant summer weather, with average highs around 70°F and lows near 55°F. Over 55 years of records, the warmest August 31st was in 2010 (76°F average), while the coldest was 2002 (47°F) — a 29°F range across recorded history. Rain or other precipitation has occurred on about 35% of August 31st dates historically, with the wettest August 31st recording 2.79" of rain. The last decade has been 4.8°F warmer on this date compared to 20-30 years ago.
The last decade has been 4.8°F warmer on this date compared to 20-30 years ago.
Planning for August 31st in Duluth, MN? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Warming Trend
1.2°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 79° | 62° | 70° | 1.22" | — |
| 2024 | 86° | 56° | 71° | — | — |
| 2023 | 68° | 54° | 61° | — | — |
| 2022 | 84° | 65° | 74° | — | — |
| 2021 | 66° | 54° | 60° | — | — |
| 2020 | 72° | 56° | 64° | 1.47" | — |
| 2019 | 72° | 47° | 59° | — | — |
| 2018 | 80° | 60° | 70° | 2.79" | — |
| 2017 | 64° | 56° | 60° | — | — |
| 2016 | 75° | 59° | 67° | — | — |
| 2015 | 84° | 63° | 73° | — | — |
| 2014 | 65° | 60° | 62° | 0.71" | — |
| 2013 | 86° | 50° | 68° | 0.36" | — |
| 2012 | 80° | 56° | 68° | — | — |
| 2011 | 59° | 54° | 56° | 0.71" | — |
| 2010warmest | 83° | 69° | 76° | 0.84" | — |
| 2009 | 73° | 46° | 60° | — | — |
| 2008 | 88° | 60° | 74° | — | — |
| 2007 | 68° | 54° | 61° | — | — |
| 2006 | 67° | 60° | 63° | — | — |
| 2005 | 67° | 50° | 58° | 0.1" | — |
| 2004 | 71° | 46° | 59° | — | — |
| 2003 | 76° | 47° | 61° | — | — |
| 2002coldest | 55° | 40° | 47° | — | — |
| 2001 | 66° | 49° | 57° | — | — |
| 2000 | 76° | 58° | 67° | 1.27" | — |
| 1999 | 66° | 60° | 63° | — | — |
| 1998 | 78° | 58° | 68° | — | — |
| 1997 | 69° | 60° | 65° | — | — |
| 1996 | 70° | 56° | 63° | — | — |
| 1995 | 80° | 59° | 70° | — | — |
| 1994 | 63° | 46° | 54° | — | — |
| 1993 | 69° | 40° | 54° | — | — |
| 1992 | 64° | 49° | 56° | — | — |
| 1991 | 64° | 56° | 60° | — | — |
| 1990 | 79° | 64° | 71° | — | — |
| 1989 | 64° | 57° | 61° | — | — |
| 1988 | 62° | 55° | 59° | — | — |
| 1987 | 66° | 48° | 57° | — | — |
| 1986 | 76° | 60° | 68° | 0.46" | — |
| 1985 | 66° | 48° | 57° | 0.43" | — |
| 1984 | 64° | 53° | 59° | — | — |
| 1983 | 78° | 64° | 71° | — | — |
| 1982 | 59° | 57° | 58° | 0.58" | — |
| 1981 | 67° | 63° | 65° | 0.03" | — |
| 1980 | 65° | 57° | 61° | 0.13" | — |
| 1979 | 63° | 56° | 59° | — | — |
| 1978 | 67° | 55° | 61° | — | — |
| 1977 | 66° | 57° | 62° | — | — |
| 1976 | 68° | 54° | 61° | 0.03" | — |
| 1975 | 63° | 54° | 58° | 0.41" | — |
| 1974 | 60° | 48° | 54° | — | — |
| 1973 | 68° | 61° | 64° | 1.22" | — |
| 1972 | 75° | 59° | 67° | 0.08" | — |
| 1971 | 57° | 54° | 55° | 0.56" | — |
55 years of data from DULUTH HARBOR STN