Duluth, Minnesota Weather
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Climate of Duluth: monthly averages
Based on 25 years of satellite and reanalysis data (2001-2025), July is usually the hottest month in Duluth, with average daytime highs around 25°C. January is the coolest, when nights typically fall to about -16°C and frost is possible on the coldest nights. That is a wide yearly range of roughly 41°C, so the seasons feel very different from each other.
The area receives about 780 mm of rain in a typical year. Most of it falls from June, and June is the wettest month at roughly 104 mm.
For outdoor plans and travel, July to September usually offer the most comfortable weather in Duluth, with mild days and relatively little rain.
| Month | Avg high | Avg low | Rainfall | Humidity |
|---|---|---|---|---|
| Jan | -8° | -16° | 23 mm | 96% |
| Feb | -6° | -15° | 27 mm | 93% |
| Mar | 1° | -8° | 41 mm | 85% |
| Apr | 8° | -1° | 72 mm | 77% |
| May | 15° | 4° | 91 mm | 77% |
| Jun | 20° | 10° | 104 mm | 79% |
| Jul | 25° | 15° | 89 mm | 74% |
| Aug | 24° | 14° | 90 mm | 72% |
| Sep | 19° | 10° | 82 mm | 75% |
| Oct | 11° | 2° | 81 mm | 80% |
| Nov | 3° | -4° | 40 mm | 85% |
| Dec | -5° | -11° | 42 mm | 93% |
Source: NASA POWER (MERRA-2 reanalysis), averaged over the roughly 50 km grid area around Duluth. Values describe typical conditions, not a forecast.
About Duluth weather
Duluth is a place in Minnesota's humid continental climate, known for cold winters shaped by its northern latitude, located about 220 km north-east of Minneapolis. Duluth gets warm summers (June–August) each year. Duluth closes out the year with very cold winters (December–February) with heavy snow. This page shows live, auto-refreshing weather for Duluth: current conditions, an hourly breakdown, a 16-day outlook, a date-lookup tool for any past or future date, and real-time air quality, sourced from Open-Meteo. Local timezone: America/Chicago.
Frequently asked questions
Duluth is about 220 km north-east of Minneapolis, in Minnesota.
Duluth sees very cold winters (December–February) with heavy snow.
The live current conditions, hourly forecast and 16-day outlook above are pulled in real time for Duluth's exact coordinates. No fixed schedule, the page updates whenever you load it.
July is usually the hottest month in Duluth, with average daytime highs of about 25°C and nights around 15°C.
The coldest nights come in January, when the average low is about -16°C and daytime highs reach around -8°C. Frost is possible on clear, calm nights.
Duluth receives about 780 mm of rain in a typical year. June is the wettest month at roughly 104 mm, the only month that averages more than 100 mm.
July to September usually offer the most comfortable weather in Duluth, with mild daytime temperatures and little rain.
In November Duluth typically sees daytime highs near 3°C and lows near -4°C, with about 40 mm of rain over the month and average humidity around 85%. Check the live forecast above for this week's actual conditions.
Up to 16 days ahead using the extended forecast and date picker above; further-out or historical dates use the same date lookup tool.
The current temperature for Duluth updates automatically at the top of this page — scroll to the hourly strip below to see how it's expected to change over the day.
Duluth's day-to-day weather follows the broader pattern of Minnesota described above. See the hourly weather forecast or the air quality index for more detail.