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October Weather in Washington, United States

Last updated: June 24, 2025

In October, the average temperature in Washington, United States hovers around 17°C (63°F), with a remarkable range where it can dip to a chilly -2°C (29°F) or soar to a sizzling 34°C (93°F). Expect about 107 mm (4.2 in) of rainfall spread across 9 days, contributing to an average humidity level of 71% that adds to the region's unique climate charm.

October Temperature in Washington

In October in Washington, the average temperature is 17°C (63°F). Maximum temperatures can reach 34°C (93°F), while minimums can drop as low as -2°C (29°F). Be prepared for both warm days and cooler nights while exploring this destination.

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 17°C (63°F), with highs reaching up to 34°C (93°F) and lows dropping to around -2°C (29°F).
JanFebMarAprMayJunJulAugSepOctNovDec404255607079838276635145
Data source: Temperature data for Washington generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

October Precipitation in Washington

In Washington in October, the precipitation amount is 107 mm (4.2 in), occurring over a span of 9 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 107 mm (4.2 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec4952991251497545611011073037
Data source: Precipitation data for October generated using information from the Copernicus Climate Change Service.
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October Humidity in Washington

In Washington in October, humidity is 71%. With an average temperature of 17°C (63°F), this humidity feels like a warm embrace, making outdoor activities enjoyable yet a bit sticky, so travelers should stay hydrated and take breaks in the shade.

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.
JanFebMarAprMayJunJulAugSepOctNovDec76%76%70%72%82%82%80%72%64%71%81%84%
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 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the 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 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec46810101111119754
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.
 TemperaturePrecipitationHumidityUV
January Weather5°C (41°F)49 mm (1.9 inches)76%moderate
February Weather6°C (42°F)52 mm (2.1 inches)76%high
March Weather13°C (55°F)99 mm (3.9 inches)70%very high
April Weather16°C (60°F)125 mm (4.9 inches)72%very high
May Weather21°C (71°F)149 mm (5.9 inches)82%very high
June Weather26°C (79°F)75 mm (3.0 inches)82%extreme
July Weather28°C (83°F)45 mm (1.8 inches)80%extreme
August Weather28°C (82°F)61 mm (2.4 inches)72%extreme
September Weather24°C (76°F)101 mm (4.0 inches)64%very high
October Weather17°C (63°F)107 mm (4.2 inches)71%high
November Weather11°C (51°F)30 mm (1.2 inches)81%moderate
December Weather7°C (45°F)37 mm (1.5 inches)84%moderate

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