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October Weather in Eureka, United States

Last updated: June 24, 2025

In October, the average temperature in Eureka, United States hovers around 10°C (51°F). Expect a range of temperatures, with minimums dipping to -12°C (10°F) and maximums soaring up to 28°C (83°F). This month brings about 35 mm (1.4 in) of precipitation spread across approximately 6 days, contributing to an average humidity of 67%. Stay prepared for a diverse weather experience!

October Temperature in Eureka

In October in Eureka, the average temperature is 10°C (51°F). The maximum can reach 28°C (83°F), while the minimum can dip as low as -12°C (10°F). This wide range of temperatures means travelers should pack accordingly, ensuring they are prepared for both warm days and chilly nights.

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

The chart illustrates October temperature patterns in Eureka, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Eureka, October typically has an average temperature of 10°C (51°F), with highs reaching up to 28°C (83°F) and lows dropping to around -12°C (10°F).
JanFebMarAprMayJunJulAugSepOctNovDec253039496074827969514127
Data source: Temperature data for Eureka 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 Eureka

In Eureka in October, the total precipitation amount is 35 mm (1.4 in) spread over a period of 6 days.

October Precipitation Trends in Eureka

The chart displays monthly precipitation patterns in Eureka, 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 Eureka, October typically receives around 35 mm (1.4 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec45486047421092021352742
Data source: Precipitation data for October generated using information from the Copernicus Climate Change Service.
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October Humidity in Eureka

In Eureka in October, humidity is 67%. With an average temperature of 10°C (51°F), this humidity feels like a chilly embrace, making traveling somewhat uncomfortable as the damp air clings to your skin, leaving you feeling cooler than the actual temperature suggests.

October Average Humidity in Eureka

This chart illustrates the average monthly humidity levels in Eureka, 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 Eureka is approximately 67%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%88%77%70%54%45%37%34%47%67%82%87%
Data source: Humidity data for October generated using information from the Copernicus Climate Change Service.

October UV Index in Eureka

In Eureka 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 Eureka.

Maximum UV Index Levels in Eureka for October

The chart shows the monthly maximum UV Index (UVI) for Eureka 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 Eureka typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec46710111212119753
Data source: Eureka 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 Eureka Compares to Other Months

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

This table compares monthly weather conditions in Eureka, showing how October’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-4°C (25°F)44 mm (1.8 inches)87%moderate
February Weather-1°C (30°F)48 mm (1.9 inches)88%high
March Weather4°C (39°F)60 mm (2.4 inches)77%high
April Weather10°C (50°F)47 mm (1.8 inches)69%very high
May Weather15°C (60°F)42 mm (1.6 inches)54%extreme
June Weather23°C (74°F)10 mm (0.4 inches)45%extreme
July Weather28°C (82°F)9 mm (0.3 inches)37%extreme
August Weather26°C (79°F)20 mm (0.8 inches)34%extreme
September Weather21°C (69°F)21 mm (0.8 inches)47%very high
October Weather10°C (51°F)35 mm (1.4 inches)67%high
November Weather5°C (41°F)27 mm (1.1 inches)82%moderate
December Weather-3°C (28°F)42 mm (1.6 inches)87%moderate

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