Weather on September 18
Duluth, MN
55 Years of Data
About This Date
September 18th in Duluth, MN typically brings mild fall weather, with average highs around 65°F and lows near 50°F. Over 56 years of records, the warmest September 18th was in 2024 (73°F average), while the coldest was 2020 (46°F) — a 27°F range across recorded history. Rain or other precipitation has occurred on about 25% of September 18th dates historically, with the wettest September 18th recording 2.35" of rain. Temperatures on this date have remained relatively stable over the past several decades.
Temperatures on this date have remained relatively stable over the past several decades.
Planning for September 18th in Duluth, MN? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026 | 60° | 56° | 58° | — | — |
| 2025 | 65° | 58° | 61° | — | — |
| 2024warmest | 82° | 65° | 73° | — | — |
| 2023 | 64° | 54° | 59° | — | — |
| 2022 | 69° | 58° | 63° | — | — |
| 2021 | 66° | 44° | 55° | — | — |
| 2020coldest | 59° | 32° | 46° | — | — |
| 2019 | 82° | 54° | 68° | 0.22" | — |
| 2018 | 61° | 55° | 58° | — | — |
| 2017 | 62° | 45° | 53° | — | — |
| 2016 | 64° | 47° | 55° | 0.02" | — |
| 2015 | 65° | 54° | 59° | — | — |
| 2014 | 53° | 42° | 48° | — | — |
| 2013 | 60° | 58° | 59° | 0.01" | — |
| 2012 | 71° | 44° | 58° | 0.21" | — |
| 2011 | 60° | 40° | 50° | 0.23" | — |
| 2010 | 58° | 43° | 50° | — | — |
| 2009 | 65° | 58° | 61° | — | — |
| 2008 | 69° | 48° | 59° | — | — |
| 2007 | 72° | 57° | 64° | 2.35" | — |
| 2006 | 55° | 45° | 50° | — | — |
| 2005 | 72° | 55° | 63° | — | — |
| 2004 | 53° | 49° | 51° | — | — |
| 2003 | 78° | 48° | 63° | — | — |
| 2002 | 60° | 41° | 51° | — | — |
| 2001 | 61° | 56° | 58° | — | — |
| 2000 | 75° | 51° | 63° | — | — |
| 1999 | 60° | 51° | 56° | — | — |
| 1998 | 66° | 56° | 61° | — | — |
| 1997 | 72° | 57° | 64° | — | — |
| 1996 | 58° | 47° | 52° | — | — |
| 1995 | 70° | 49° | 59° | — | — |
| 1994 | 72° | 54° | 63° | — | — |
| 1993 | 58° | 45° | 51° | — | — |
| 1992 | 54° | 41° | 47° | 0.9" | — |
| 1991 | 64° | 41° | 53° | — | — |
| 1990 | 60° | 48° | 54° | 1.7" | — |
| 1989 | 80° | 57° | 69° | — | — |
| 1988 | 59° | 55° | 57° | 0.13" | — |
| 1987 | 59° | 54° | 56° | 0.31" | — |
| 1986 | 64° | 54° | 59° | — | — |
| 1985 | 70° | 56° | 63° | 0.01" | — |
| 1984 | 84° | 58° | 71° | — | — |
| 1983 | 63° | 50° | 56° | — | — |
| 1982 | 58° | 39° | 48° | — | — |
| 1981 | 70° | 47° | 58° | — | — |
| 1980 | 56° | 50° | 53° | 0.1" | — |
| 1979 | 62° | 49° | 55° | — | — |
| 1978 | 55° | 50° | 53° | — | — |
| 1977 | 60° | — | — | 0.04" | — |
| 1976 | 82° | 42° | 62° | — | — |
| 1975 | 65° | 52° | 58° | 1.68" | — |
| 1974 | 73° | 46° | 60° | — | — |
| 1973 | 66° | 47° | 56° | — | — |
| 1972 | 56° | 50° | 53° | — | — |
| 1971 | 60° | 43° | 51° | — | — |
Duluth, MN Temperature Range by Month
Average monthly highs and lows. The shaded band shows the typical daily temperature range.
Duluth, MN Monthly Precipitation
Average rainfall and snowfall per month, in inches.
Duluth, MN Daily Temperature Calendar
Average daily high temperature for every day of the year. Each cell is the climatological mean for that calendar day across 55 years of NOAA data.
Best Time to Visit Duluth, MN
Most pleasant months in Duluth, MN: June, July, August, September.