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October Weather in Bellevue, United States

Last updated: June 24, 2025

In Bellevue, United States, the average temperature in October hovers around 14°C (57°F), with extremes ranging from a chilly -1°C (31°F) to a warm 31°C (89°F). Expect about 128 mm (5.0 in) of precipitation over 14 days, contributing to the region's average humidity of 82%. Be prepared for a mix of weather as you explore this captivating destination!

October Temperature in Bellevue

In October in Bellevue, the average temperature is 14°C (57°F). The maximum can reach 31°C (89°F) and the minimum can be as low as -1°C (31°F). Be sure to pack layers for your travels, as the weather can vary dramatically throughout the day.

October Weather in Bellevue: Daily Temperature Highs, Lows, and Averages

The chart illustrates October temperature patterns in Bellevue, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Bellevue, October typically has an average temperature of 14°C (57°F), with highs reaching up to 31°C (89°F) and lows dropping to around -1°C (31°F).
JanFebMarAprMayJunJulAugSepOctNovDec313541516270757367574236
Data source: Temperature data for Bellevue 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 Bellevue

In Bellevue in October, the precipitation amount is 128 mm (5.0 in) over a span of 14 days.

October Precipitation Trends in Bellevue

The chart displays monthly precipitation patterns in Bellevue, 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 Bellevue, October typically receives around 128 mm (5.0 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec951261091321511551548912812894102
Data source: Precipitation data for October generated using information from the Copernicus Climate Change Service.
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October Humidity in Bellevue

In Bellevue in October, humidity is 82%. With an average temperature of 14°C (57°F), this humidity feels like a thick blanket enveloping you, making outdoor activities uncomfortable and travel more challenging due to the heavy, damp air.

October Average Humidity in Bellevue

This chart illustrates the average monthly humidity levels in Bellevue, 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 Bellevue is approximately 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec89%88%87%87%81%83%82%76%77%82%89%86%
Data source: Humidity data for October generated using information from the Copernicus Climate Change Service.

October UV Index in Bellevue

In Bellevue 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 Bellevue, you can refer to this Hourly UV Index in Bellevue.

Maximum UV Index Levels in Bellevue for October

The chart shows the monthly maximum UV Index (UVI) for Bellevue 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 Bellevue typically reaches 6, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356910101098642
Data source: Bellevue 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 Bellevue Compares to Other Months

Weather in Bellevue varies notably across the year, with each month offering distinct climate conditions. This page compares October’s weather to other months in Bellevue, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Bellevue, showing how October’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (31°F)95 mm (3.7 inches)88%moderate
February Weather1°C (35°F)125 mm (4.9 inches)88%moderate
March Weather5°C (42°F)109 mm (4.3 inches)87%high
April Weather11°C (52°F)132 mm (5.2 inches)87%very high
May Weather17°C (63°F)150 mm (5.9 inches)81%very high
June Weather21°C (70°F)155 mm (6.1 inches)83%very high
July Weather24°C (75°F)154 mm (6.1 inches)82%very high
August Weather23°C (73°F)89 mm (3.5 inches)76%very high
September Weather20°C (68°F)128 mm (5.0 inches)77%very high
October Weather14°C (57°F)128 mm (5.0 inches)82%high
November Weather5°C (42°F)94 mm (3.7 inches)89%moderate
December Weather2°C (36°F)102 mm (4.0 inches)86%low

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