Duluth

What is the climate like in Duluth?

The best time to visit Duluth is typically July, the year's most comfortable month (6.5/10). Duluth is warmest in August, when daily highs average 72°F (22°C), and coolest in January, when lows fall to about 11°F (-12°C). The wettest month is typically September and the driest is January; the year sees roughly 38 in (964 mm) of precipitation.

• Best time to visitJuly — the year's comfort peak (6.5/10)
• Warmest monthAugust — average high 72°F (22°C)
• Coolest monthJanuary — average low 11°F (-12°C)
• Wettest monthSeptember (4.6 in (117 mm))
• Driest monthJanuary (1.1 in (29 mm))
• Annual precipitation38 in (964 mm)
• Based on2016-2025 daily ERA5 reanalysis data (10-year normals)
• Records fromSuperior, 7 km away (1909-2026)