October Weather in Washington, United States

Last updated: June 24, 2025

In Washington, United States, the average temperature in October is a mild 14°C (58°F). However, temperatures can swing from a chilly -1°C (30°F) at night to a warm 32°C (90°F) during the day. Expect 122 mm (4.8 in) of precipitation spread across 14 days, contributing to an average humidity of 82%.

October Temperature in Washington

In October in Washington, the average temperature is 14°C (58°F), with maximums reaching 32°C (90°F) and minimums dipping as low as -1°C (30°F). It's advisable to pack clothing for both warm days and chilly nights when traveling during this month.

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 14°C (58°F), with highs reaching up to 32°C (90°F) and lows dropping to around -1°C (30°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 122 mm (4.8 in) over the course of 14 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 122 mm (4.8 inches) of precipitation spread over approximately 14 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 82%. With an average temperature of 14°C (58°F), this humidity feels like a heavy blanket wrapping around you, making travel uncomfortable and sticky.

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 82%, 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	0°C (32°F)	88 mm (3.5 inches)	88%	moderate
February Weather	2°C (36°F)	121 mm (4.8 inches)	88%	moderate
March Weather	6°C (42°F)	112 mm (4.4 inches)	87%	high
April Weather	11°C (52°F)	130 mm (5.1 inches)	87%	very high
May Weather	17°C (63°F)	138 mm (5.5 inches)	81%	very high
June Weather	21°C (70°F)	147 mm (5.8 inches)	83%	very high
July Weather	24°C (75°F)	142 mm (5.6 inches)	82%	very high
August Weather	23°C (73°F)	88 mm (3.5 inches)	76%	very high
September Weather	20°C (68°F)	124 mm (4.9 inches)	77%	very high
October Weather	14°C (58°F)	122 mm (4.8 inches)	82%	high
November Weather	6°C (43°F)	88 mm (3.5 inches)	89%	moderate
December Weather	3°C (37°F)	106 mm (4.2 inches)	86%	low