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October Weather in Washington, United States

Last updated: June 24, 2025

In Washington, United States, the average temperature in October hovers around 15°C (59°F). During this month, temperatures can range from a brisk -7°C (20°F) to a warm 32°C (91°F). While you might enjoy some sunshine, be prepared for 13 mm (0.5 in) of precipitation over approximately 2 days. The average humidity level sits at a comfortable 62%, making for a pleasant yet varied climate.

October Temperature in Washington

In October in Washington, the average temperature is 15°C (59°F), with maximums reaching up to 32°C (91°F) and minimums dropping as low as -7°C (20°F). This diverse temperature range makes it essential for travelers to pack accordingly, ensuring they're prepared for both warm days and chilly nights.

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 (59°F), with highs reaching up to 32°C (91°F) and lows dropping to around -7°C (20°F).
JanFebMarAprMayJunJulAugSepOctNovDec384149596780858375584839
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 13 mm (0.5 in) over a span of 2 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 13 mm (0.5 inches) of precipitation spread over approximately 2 days.
JanFebMarAprMayJunJulAugSepOctNovDec484248121619105132935
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 62%. With an average temperature of 15°C (59°F), this humidity feels like a refreshing embrace, making it ideal for leisurely strolls and explorations without feeling overly hot or 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 62%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec80%82%72%62%45%34%30%31%47%62%77%80%
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.
JanFebMarAprMayJunJulAugSepOctNovDec468101112121110754
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 Weather3°C (38°F)48 mm (1.9 inches)80%moderate
February Weather5°C (41°F)42 mm (1.7 inches)82%high
March Weather9°C (49°F)48 mm (1.9 inches)72%very high
April Weather15°C (59°F)12 mm (0.5 inches)62%very high
May Weather19°C (67°F)16 mm (0.6 inches)45%extreme
June Weather27°C (80°F)1 mm (0.0 inches)34%extreme
July Weather29°C (85°F)9 mm (0.3 inches)30%extreme
August Weather28°C (83°F)10 mm (0.4 inches)31%extreme
September Weather24°C (75°F)5 mm (0.2 inches)47%very high
October Weather15°C (59°F)13 mm (0.5 inches)62%high
November Weather9°C (49°F)29 mm (1.1 inches)77%moderate
December Weather4°C (39°F)35 mm (1.4 inches)80%moderate

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