October Weather in Washington, United States

Last updated: June 24, 2025

In October, the average temperature in Washington, United States hovers around 15°C (60°F). While the mercury can dip to a chilly 0°C (32°F), it can also soar to a scorching 35°C (95°F). Expect 113 mm (4.4 in) of precipitation over approximately 11 days, contributing to an average humidity level of 81%.

October Temperature in Washington

In October in Washington, the average temperature is 15°C (60°F), with maximums reaching 35°C (95°F) and minimums dropping as low as 0°C (32°F). Be sure to pack layers to accommodate the wide temperature range and enjoy all that Washington has to offer!

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 15°C (60°F), with highs reaching up to 35°C (95°F) and lows dropping to around 0°C (32°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 113 mm (4.4 in) 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 113 mm (4.4 inches) of precipitation spread over approximately 11 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 Washington

In Washington in October, humidity is 81%. With an average temperature of 15°C (60°F), this humidity feels like a heavy blanket wrapping around you, making outdoor activities feel sluggish and draining, which can challenge even the best-prepared traveler.

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	1°C (34°F)	91 mm (3.6 inches)	88%	moderate
February Weather	4°C (39°F)	125 mm (4.9 inches)	88%	moderate
March Weather	7°C (46°F)	115 mm (4.5 inches)	88%	high
April Weather	12°C (55°F)	143 mm (5.6 inches)	86%	very high
May Weather	18°C (65°F)	147 mm (5.8 inches)	82%	very high
June Weather	22°C (72°F)	153 mm (6.0 inches)	84%	very high
July Weather	25°C (77°F)	112 mm (4.4 inches)	82%	very high
August Weather	24°C (75°F)	123 mm (4.8 inches)	73%	very high
September Weather	21°C (70°F)	104 mm (4.1 inches)	73%	very high
October Weather	15°C (60°F)	113 mm (4.4 inches)	81%	high
November Weather	7°C (45°F)	82 mm (3.2 inches)	89%	moderate
December Weather	4°C (39°F)	117 mm (4.6 inches)	86%	moderate