Duluth, MN Weather
Duluth hourly forecast: next 24 hours
Today's high of 82°F (28°C) is about 7°F (4°C) above the typical August high of 75°F (24°C).
Current conditions in detail
Duluth weather tomorrow (Friday, August 7)
Tomorrow in Duluth looks sunny, with a high of 84° and an overnight low of 60°. There is a 57% chance of rain - plan accordingly. Winds top out near 14 mph, and the UV index reaches 6 (high).
Duluth 14-day forecast
About the weather in Duluth
Weather in Duluth is shaped by its humid continental climate - expect warm summers and cold, often snowy winters. July afternoons typically reach 78°F (25°C), while January highs hover near 22°F (-6°C). Annual precipitation averages 33.1 inches (842 mm) over about 113 rainy days.
Duluth weather: quick facts
- Hottest month: July - highs near 78°F (25°C)
- Coldest month: January - highs near 22°F (-6°C)
- Record high: 97°F (36°C) · Record low: -30°F (-34°C) (2015–2024)
- Wettest month: August (10 rainy days) · Sunniest: July (12.6 h sun/day)
- Climate type: humid continental - warm summers and cold, often snowy winters
- Snow: about 27 days a year
Temperatures through the year
The warmest stretch of the year centers on July. Highs average 78°F (25°C) and overnight lows stay near 63°F (17°C). The coolest month is January, with typical highs of 22°F (-6°C) and lows around 9°F (-13°C). Based on 2015–2024 weather data, temperatures have reached as high as 97°F (36°C) and dropped as low as -30°F (-34°C).
Rain, sun and snow
August is usually the wettest month. It brings about 3.8 inches (97 mm) of rain over 10 days, while January is the driest. July brings the most sunshine, averaging 12.6 hours of sun a day. Snow falls on about 27 days in a typical year, mostly from October through May.
Season by season
Spring (March through May)
Spring in Duluth is brisk and cold, with daytime highs averaging 48°F (9°C) and nights around 33°F (0°C); expect showers on roughly 30 days across the season, plus around 8 snowy days.
Summer (June through August)
Summer in Duluth is pleasantly warm, with daytime highs averaging 75°F (24°C) and nights around 60°F (16°C); expect showers on roughly 32 days across the season.
Fall (September through November)
Fall in Duluth stays on the cool side of mild, with daytime highs averaging 55°F (13°C) and nights around 43°F (6°C); expect showers on roughly 29 days across the season, plus around 4 snowy days.
Winter (December through February)
Winter in Duluth is frigid, with daytime highs averaging 25°F (-4°C) and nights around 11°F (-12°C); expect showers on roughly 22 days across the season, plus around 15 snowy days. Wind makes those temperatures feel harsher than they sound - pair the forecast winds with the wind speed converter to judge conditions on exposed skin.
Average temperatures in Duluth by month
| Month | High | Low | Rain days | Precipitation | Sunshine | Humidity |
|---|---|---|---|---|---|---|
| January | 22° | 9° | 6 | 1.0 in | 5.2 h/day | 78% |
| February | 24° | 8° | 6 | 1.2 in | 7.1 h/day | 72% |
| March | 37° | 22° | 7 | 2.1 in | 8.3 h/day | 70% |
| April | 46° | 32° | 11 | 2.9 in | 8.4 h/day | 69% |
| May | 60° | 44° | 11 | 3.6 in | 10.2 h/day | 70% |
| June | 71° | 55° | 11 | 3.6 in | 12.2 h/day | 72% |
| July | 78° | 63° | 10 | 3.4 in | 12.6 h/day | 73% |
| August | 75° | 62° | 10 | 3.8 in | 10.8 h/day | 74% |
| September | 69° | 56° | 10 | 3.5 in | 9.2 h/day | 75% |
| October | 54° | 43° | 10 | 3.0 in | 6.5 h/day | 72% |
| November | 40° | 29° | 9 | 2.5 in | 5.1 h/day | 72% |
| December | 28° | 16° | 10 | 2.6 in | 4.2 h/day | 78% |