October Weather in Washington, United States

Last updated: June 24, 2025

In October, the average temperature in Washington, United States is a comfortable 13°C (55°F), making it a pleasant time to visit. Expect temperatures to swing between a chilly -5°C (23°F) and a warm 34°C (94°F). With an average precipitation amount of 121 mm (4.8 in) spread over 8 days, it’s advisable to pack an umbrella. Additionally, the air retains a 71% humidity level, so be prepared for some mugginess during your stay!

October Temperature in Washington

In October in Washington, the average temperature is 13°C (55°F). Maximum temperatures can reach 34°C (94°F), while minimums can dip as low as -5°C (23°F). Pack accordingly to enjoy diverse weather conditions during your travels!

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 13°C (55°F), with highs reaching up to 34°C (94°F) and lows dropping to around -5°C (23°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 121 mm (4.8 in) over the course of 8 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 121 mm (4.8 inches) of precipitation spread over approximately 8 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 71%. With an average temperature of 13°C (55°F), this humidity feels like a damp embrace, making travel a bit challenging as the moisture clings to your skin and the air feels thick, creating a sense of heaviness that can sap your energy 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 71%, 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 (30°F)	28 mm (1.1 inches)	76%	moderate
February Weather	-1°C (30°F)	27 mm (1.1 inches)	77%	moderate
March Weather	7°C (45°F)	86 mm (3.4 inches)	70%	high
April Weather	12°C (53°F)	60 mm (2.4 inches)	73%	very high
May Weather	18°C (65°F)	201 mm (7.9 inches)	82%	very high
June Weather	25°C (78°F)	94 mm (3.7 inches)	82%	extreme
July Weather	27°C (81°F)	89 mm (3.5 inches)	81%	extreme
August Weather	25°C (77°F)	95 mm (3.7 inches)	78%	very high
September Weather	22°C (72°F)	67 mm (2.7 inches)	71%	very high
October Weather	13°C (55°F)	121 mm (4.8 inches)	71%	high
November Weather	6°C (43°F)	31 mm (1.2 inches)	81%	moderate
December Weather	2°C (35°F)	28 mm (1.1 inches)	84%	moderate