October Weather in Washington, United States

Last updated: June 24, 2025

In Washington, United States, the average temperature for October hovers around 11°C (53°F). Expect a range with minimums dipping to -5°C (24°F) and maximums peaking at 26°C (79°F). With 174 mm (6.9 in) of precipitation over 11 days, you might want to carry an umbrella. The average humidity is a comfortable 81%, making for a refreshing atmosphere.

October Temperature in Washington

In October, in Washington, the average temperature is 11°C (53°F). Maximums can reach 26°C (79°F) and minimums can be as low as -5°C (24°F). Travelers should be prepared for a wide range of temperatures and pack accordingly.

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

The chart illustrates October temperature patterns in Washington, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Washington, October typically has an average temperature of 11°C (53°F), with highs reaching up to 26°C (79°F) and lows dropping to around -5°C (24°F).

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

October Precipitation in Washington

In Washington in October, the precipitation amount is 174 mm (6.9 in) occurring over the course of 11 days.

October Precipitation Trends in Washington

The chart displays monthly precipitation patterns in Washington, 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 Washington, October typically receives around 174 mm (6.9 inches) of precipitation spread over approximately 11 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 Washington

In Washington in October, humidity is 81%. With an average temperature of 11°C (53°F), this humidity feels like a damp chill that can make outdoor activities uncomfortable, requiring layers for protection against the moisture in the air while exploring.

October Average Humidity in Washington

This chart illustrates the average monthly humidity levels in Washington, 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 Washington is approximately 81%, 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 Washington

In Washington in October, the maximum UV index is 6, which corresponds to a high Exposure Category. The time to burn is approximately 25 minutes. To find the hourly UV index in Washington, you can refer to this Hourly UV Index in Washington.

Maximum UV Index Levels in Washington for October

The chart shows the monthly maximum UV Index (UVI) for Washington 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 Washington typically reaches 6, which falls under the high exposure category.

Data source: Washington 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 Washington Compares to Other Months

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

This table compares monthly weather conditions in Washington, showing how October’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-4°C (26°F)	86 mm (3.4 inches)	89%	moderate
February Weather	-2°C (29°F)	104 mm (4.1 inches)	88%	moderate
March Weather	1°C (34°F)	90 mm (3.6 inches)	86%	high
April Weather	8°C (46°F)	157 mm (6.2 inches)	84%	very high
May Weather	14°C (57°F)	121 mm (4.8 inches)	76%	very high
June Weather	19°C (67°F)	109 mm (4.3 inches)	72%	very high
July Weather	22°C (72°F)	182 mm (7.1 inches)	66%	very high
August Weather	21°C (70°F)	143 mm (5.6 inches)	64%	very high
September Weather	17°C (63°F)	129 mm (5.1 inches)	72%	very high
October Weather	11°C (53°F)	174 mm (6.9 inches)	81%	high
November Weather	4°C (39°F)	106 mm (4.2 inches)	87%	moderate
December Weather	-1°C (30°F)	130 mm (5.1 inches)	84%	low