Duluth, Minnesota Climate by Month
Duluth, Minnesota, United States
Warm summers and bitterly cold winters, with rain spread through the year.
Duluth has warm summers and bitterly cold winters, with rain spread through the year. July is the warmest month, with highs around 79°F (26°C); January is the coolest at 22°F (-6°C), and nights dip to 4°F (-16°C). It gets 29 in (747 mm) of rain a year, spread across the months.
- Warmest month
- 79°F(26°C)
- Average high, July
- Coldest nights
- 4°F(-16°C)
- Average low, January
- Rain per year
- 29 in(747 mm)
- No clear rainy season
- Humidity
- 70%
- Sunniest: July
Best and worst months in Duluth
Best for weatherThe most comfortable weather comes from June to August, with highs around 76°F (25°C) and about 3.9 in (99 mm) of rain a month.
Least pleasantJanuary is the least pleasant month: it's the coldest, with highs of only 22°F (-6°C).
Comfort combines how close the afternoon high is to 75°F (24°C) with how much rain falls and how humid it is. See where the weather is best in June.
Temperature and rain through the year
Highs and lows (°F)
Average highAverage low
Rain (in per month)
Duluth weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 22°F(-6°C) | 4°F(-16°C) | 0.8 in(21 mm) | 74% | 1.3 |
| FebFebruary | 26°F(-3°C) | 7°F(-14°C) | 0.8 in(21 mm) | 63% | 2.1 |
| MarMarch | 37°F(3°C) | 19°F(-7°C) | 1.4 in(36 mm) | 76% | 3.4 |
| AprApril | 49°F(9°C) | 33°F(0°C) | 2.4 in(62 mm) | 58% | 4.4 |
| MayMay | 63°F(17°C) | 43°F(6°C) | 3.3 in(84 mm) | 65% | 5.2 |
| JunJuneBest | 73°F(23°C) | 52°F(11°C) | 3.9 in(100 mm) | 68% | 5.7 |
| JulJulyBest | 79°F(26°C) | 58°F(15°C) | 3.8 in(97 mm) | 67% | 5.9 |
| AugAugustBest | 77°F(25°C) | 58°F(15°C) | 3.9 in(100 mm) | 69% | 5.0 |
| SepSeptember | 69°F(21°C) | 50°F(10°C) | 3.2 in(81 mm) | 75% | 3.7 |
| OctOctober | 55°F(13°C) | 38°F(3°C) | 2.7 in(69 mm) | 65% | 2.1 |
| NovNovember | 40°F(4°C) | 26°F(-3°C) | 1.7 in(44 mm) | 79% | 1.3 |
| DecDecember | 27°F(-3°C) | 12°F(-11°C) | 1.3 in(32 mm) | 81% | 0.9 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
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