Weather on August 18
Duluth, MN
55 Years of Data
Avg High
73°F
Avg Low
58°F
Warmest
2021
75°F avg
Coldest
2002
49°F avg
About This Date
August 18th in Duluth, MN typically brings pleasant summer weather, with average highs around 73°F and lows near 58°F. Over 55 years of records, the warmest August 18th was in 2021 (75°F average), while the coldest was 2002 (49°F) — a 26°F range across recorded history. Rain or other precipitation has occurred on about 24% of August 18th dates historically, with the wettest August 18th recording 4.65" of rain. The last decade has been 4.7°F warmer on this date compared to 20-30 years ago.
The last decade has been 4.7°F warmer on this date compared to 20-30 years ago.
Planning for August 18th in Duluth, MN? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 63° | 60° | 61° | 1.02" | — |
| 2024 | 73° | 63° | 68° | — | — |
| 2023 | 78° | 57° | 68° | — | — |
| 2022 | 76° | 61° | 68° | 0.84" | — |
| 2021warmest | 80° | 70° | 75° | — | — |
| 2020 | 81° | 52° | 66° | — | — |
| 2019 | 74° | 56° | 65° | 0.46" | — |
| 2018 | 76° | 58° | 67° | — | — |
| 2017 | 73° | 57° | 65° | — | — |
| 2016 | 86° | 62° | 74° | — | — |
| 2015 | 66° | 57° | 62° | 3.18" | — |
| 2014 | 65° | 57° | 61° | 4.65" | — |
| 2013 | 84° | 56° | 70° | — | — |
| 2012 | 78° | 50° | 64° | 0.25" | — |
| 2011 | 84° | 58° | 71° | — | — |
| 2010 | 67° | 54° | 60° | 2.64" | — |
| 2009 | 74° | 54° | 64° | — | — |
| 2008 | 78° | 61° | 69° | — | — |
| 2007 | 61° | 46° | 53° | — | — |
| 2006 | 77° | 64° | 71° | — | — |
| 2005 | 62° | 57° | 60° | — | — |
| 2004 | 76° | 41° | 58° | — | — |
| 2003 | 72° | 66° | 69° | — | — |
| 2002coldest | 64° | 34° | 49° | — | — |
| 2001 | 79° | 59° | 69° | — | — |
| 2000 | 69° | 57° | 63° | — | — |
| 1999 | 80° | 57° | 69° | — | — |
| 1998 | 69° | 59° | 64° | — | — |
| 1997 | 64° | 55° | 60° | — | — |
| 1996 | 79° | 60° | 69° | — | — |
| 1995 | 67° | 62° | 64° | — | — |
| 1994 | 60° | 54° | 57° | — | — |
| 1993 | 72° | 60° | 66° | 0.05" | — |
| 1992 | 75° | 60° | 68° | — | — |
| 1991 | 65° | 62° | 63° | — | — |
| 1990 | 71° | 58° | 64° | 3.43" | — |
| 1989 | 75° | 59° | 67° | — | — |
| 1988 | 64° | 57° | 61° | — | — |
| 1987 | 73° | 61° | 67° | — | — |
| 1986 | 68° | 59° | 64° | — | — |
| 1985 | 60° | 51° | 56° | — | — |
| 1984 | 77° | 61° | 69° | — | — |
| 1983 | 79° | 66° | 72° | 0.28" | — |
| 1982 | 75° | 65° | 70° | — | — |
| 1981 | 75° | 61° | 68° | — | — |
| 1980 | 70° | 63° | 66° | — | — |
| 1979 | 83° | 58° | 70° | 0.46" | — |
| 1978 | 70° | 60° | 65° | — | — |
| 1977 | 73° | 55° | 64° | — | — |
| 1976 | 73° | 51° | 62° | — | — |
| 1975 | 68° | 53° | 61° | — | — |
| 1974 | 80° | 60° | 70° | — | — |
| 1973 | 69° | 62° | 66° | — | — |
| 1972 | 71° | 61° | 66° | 0.36" | — |
| 1971 | 79° | 61° | 70° | 2.49" | — |
55 years of data from DULUTH HARBOR STN