October Weather in Washington, United States

Last updated: June 24, 2025

The average temperature in Washington, United States during October is a mild 16°C (60°F). However, be prepared for extremes, as temperatures can dip as low as -2°C (28°F) and soar up to 34°C (94°F). With an average precipitation of 97 mm (3.8 in) spread over 10 days, and an average humidity level of 76%, it's advisable to pack for both sun and rain!

October Temperature in Washington

In October in Washington, the average temperature is 16°C (60°F). Maximums can reach 34°C (94°F), and minimums can be as low as -2°C (28°F). Be prepared for a wide range of temperatures, making it essential to pack both light and warm clothing for your trip.

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 16°C (60°F), with highs reaching up to 34°C (94°F) and lows dropping to around -2°C (28°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 total precipitation amount is 97 mm (3.8 in) over a span of 10 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 97 mm (3.8 inches) of precipitation spread over approximately 10 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 76%. With an average temperature of 16°C (60°F), this humidity feels like a warm embrace, making it somewhat uncomfortable for traveling, as the air can feel heavy and oppressive, potentially leading to fatigue and a constant need for hydration.

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 76%, 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 (33°F)	93 mm (3.7 inches)	87%	moderate
February Weather	3°C (37°F)	114 mm (4.5 inches)	85%	moderate
March Weather	8°C (47°F)	139 mm (5.5 inches)	86%	high
April Weather	13°C (55°F)	123 mm (4.8 inches)	84%	very high
May Weather	20°C (67°F)	133 mm (5.2 inches)	79%	very high
June Weather	24°C (76°F)	118 mm (4.6 inches)	82%	extreme
July Weather	26°C (79°F)	89 mm (3.5 inches)	79%	very high
August Weather	24°C (76°F)	91 mm (3.6 inches)	70%	very high
September Weather	22°C (72°F)	71 mm (2.8 inches)	69%	very high
October Weather	16°C (60°F)	97 mm (3.8 inches)	76%	high
November Weather	7°C (44°F)	102 mm (4.0 inches)	88%	moderate
December Weather	4°C (39°F)	104 mm (4.1 inches)	87%	moderate