October Weather in Duluth, United States

Last updated: June 24, 2025

In October, the average temperature in Duluth, United States hovers around 18°C (65°F). However, be prepared for a range of temperatures, as it can dip to a chilly 0°C (32°F) or soar up to a blazing 36°C (98°F). Expect about 140 mm (5.5 in) of precipitation spread across 9 days, accompanied by an average humidity of 78%. Stay ready for a mix of weather!

October Temperature in Duluth

In October in Duluth, the average temperature is 18°C (65°F). Maximums can reach 36°C (98°F), while minimums can drop as low as 0°C (32°F). This variation in temperature makes it essential for travelers to pack both light clothing for the warmer days and warmer layers for the cooler nights.

October Weather in Duluth: Daily Temperature Highs, Lows, and Averages

The chart illustrates October temperature patterns in Duluth, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Duluth, October typically has an average temperature of 18°C (65°F), with highs reaching up to 36°C (98°F) and lows dropping to around 0°C (32°F).

Data source: Temperature data for Duluth generated using information from the Copernicus Climate Change Service.

October Precipitation in Duluth

In Duluth in October, the total precipitation amount is 140 mm (5.5 in) spread over a span of 9 days.

October Precipitation Trends in Duluth

The chart displays monthly precipitation patterns in Duluth, with values for each month alongside October’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how October’s conditions compare to those of other months. In Duluth, October typically receives around 140 mm (5.5 inches) of precipitation spread over approximately 9 days.

Data source: Precipitation data for October generated using information from the Copernicus Climate Change Service.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

October Humidity in Duluth

In Duluth in October, humidity is 78%. With an average temperature of 18°C (65°F), this humidity feels like a warm, enveloping blanket, making travel quite muggy and potentially uncomfortable, as it can leave you feeling sticky and fatigued more quickly than usual.

October Average Humidity in Duluth

This chart illustrates the average monthly humidity levels in Duluth, with October’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In October, average humidity in Duluth is approximately 78%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for October generated using information from the Copernicus Climate Change Service.

October UV Index in Duluth

In Duluth in October, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Duluth.

Maximum UV Index Levels in Duluth for October

The chart shows the monthly maximum UV Index (UVI) for Duluth in October, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In October, the maximum UV index in Duluth typically reaches 8, which falls under the very high exposure category.

Data source: Duluth October UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

How October Weather in Duluth Compares to Other Months

Weather in Duluth varies notably across the year, with each month offering distinct climate conditions. This page compares October’s weather to other months in Duluth, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Duluth, showing how October’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	7°C (45°F)	112 mm (4.4 inches)	86%	moderate
February Weather	10°C (50°F)	160 mm (6.3 inches)	84%	high
March Weather	13°C (56°F)	142 mm (5.6 inches)	83%	very high
April Weather	16°C (62°F)	129 mm (5.1 inches)	81%	very high
May Weather	21°C (71°F)	116 mm (4.6 inches)	81%	extreme
June Weather	24°C (76°F)	134 mm (5.3 inches)	81%	extreme
July Weather	26°C (79°F)	118 mm (4.7 inches)	83%	extreme
August Weather	25°C (78°F)	156 mm (6.1 inches)	81%	very high
September Weather	23°C (74°F)	115 mm (4.5 inches)	82%	very high
October Weather	18°C (65°F)	140 mm (5.5 inches)	78%	very high
November Weather	11°C (52°F)	83 mm (3.3 inches)	86%	high
December Weather	9°C (48°F)	141 mm (5.5 inches)	89%	moderate