October Weather in Sequim, United States

Last updated: June 24, 2025

In October, the average temperature in Sequim, United States is a cool 9°C (48°F). You can expect fluctuations, with minimum temperatures dropping to 0°C (33°F) and highs reaching 21°C (70°F). Precipitation totals around 143 mm (5.6 in) spread over 17 days, contributing to an average humidity level of 83%.

October Temperature in Sequim

In October in Sequim, the average temperature is 9°C (48°F). The maximum can reach 21°C (70°F) and the minimum can be as low as 0°C (33°F). This mild weather makes Sequim an ideal destination for travelers who enjoy outdoor activities during this time of year.

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

The chart illustrates October temperature patterns in Sequim, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sequim, October typically has an average temperature of 9°C (48°F), with highs reaching up to 21°C (70°F) and lows dropping to around 0°C (33°F).

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

October Precipitation in Sequim

In Sequim in October, the total precipitation amount is 143 mm (5.6 in) spread over 17 days.

October Precipitation Trends in Sequim

The chart displays monthly precipitation patterns in Sequim, 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 Sequim, October typically receives around 143 mm (5.6 inches) of precipitation spread over approximately 17 days.

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

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Millimeters (mm) Inches (in)

October Humidity in Sequim

In Sequim in October humidity is 83%. With an average temperature of 9°C (48°F), this humidity feels like an enveloping blanket, making outdoor activities quite uncomfortable and encouraging travelers to seek shelter or shade frequently.

October Average Humidity in Sequim

This chart illustrates the average monthly humidity levels in Sequim, 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 Sequim is approximately 83%, 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 Sequim

In Sequim in October, the maximum UV index reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check the Hourly UV Index in Sequim.

Maximum UV Index Levels in Sequim for October

The chart shows the monthly maximum UV Index (UVI) for Sequim 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 Sequim typically reaches 5, which falls under the moderate exposure category.

Data source: Sequim 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 Sequim Compares to Other Months

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

This table compares monthly weather conditions in Sequim, showing how October’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	3°C (38°F)	182 mm (7.2 inches)	86%	low
February Weather	2°C (36°F)	150 mm (5.9 inches)	84%	moderate
March Weather	4°C (40°F)	128 mm (5.1 inches)	85%	moderate
April Weather	7°C (44°F)	119 mm (4.7 inches)	83%	high
May Weather	11°C (51°F)	93 mm (3.7 inches)	84%	very high
June Weather	13°C (56°F)	118 mm (4.6 inches)	84%	very high
July Weather	15°C (60°F)	49 mm (1.9 inches)	82%	very high
August Weather	16°C (61°F)	45 mm (1.8 inches)	73%	very high
September Weather	13°C (56°F)	122 mm (4.8 inches)	74%	high
October Weather	9°C (48°F)	143 mm (5.6 inches)	83%	moderate
November Weather	6°C (42°F)	199 mm (7.8 inches)	86%	moderate
December Weather	3°C (38°F)	193 mm (7.6 inches)	87%	low