Historical Weather in Duluth, MN
See 55+ years of weather history for any date in Duluth going back to 1970.
Part of Minnesota weather history · Minnesota temperature records
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Monthly Climate Averages
Historical temperature and precipitation averages for Duluth, MN, based on 55+ years of weather data.
Temperatures in Fahrenheit. Precipitation and snowfall in inches.
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.
Growing Season & Frost in Duluth, MN
Based on the dates the average overnight low reaches freezing (32°F / 0°C), from 50+ years of NOAA station data.
Hours of Daylight in Duluth, MN
Day length across the year at 46.8°N latitude. Computed from solar geometry.
Best Time to Visit Duluth, MN
Duluth, MN has no months that meet our "pleasant" threshold — every season has tradeoffs.
Duluth Temperature Records
- Record High: The hottest temperature ever recorded in Duluth, MN is 101°F, set on July 15, 2006.
- Record Low: The coldest temperature ever recorded in Duluth, MN is -39°F, set on January 15, 1972.
- Data Coverage: Based on 57 years of data from NOAA weather station: SUPERIOR.
All-Time Record High
All-Time Record Low
Monthly Temperature Records in Duluth
| Month | Record High | Record Low |
|---|---|---|
| January | 57°F(2012) | -39°F(1972) |
| February | 59°F(1976) | -39°F(1996) |
| March | 78°F(2007) | -29°F(1989) |
| April | 85°F(2003) | -5°F(1975) |
| May | 95°F(2016) | 19°F(1989) |
| June | 98°F(1995) | 27°F(1972) |
| July | 101°F(2006) | 35°F(1988) |
| August | 100°F(2006) | 32°F(1986) |
| September | 97°F(1976) | 23°F(1974) |
| October | 89°F(2003) | 8°F(1976) |
| November | 79°F(2020) | -19°F(1976) |
| December | 57°F(2023) | -34°F(1983) |