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October Weather in Walnut Creek, United States

Last updated: June 24, 2025

In Walnut Creek, United States, the average temperature in October hovers around 19°C (67°F), with extremes ranging from a brisk 0°C (32°F) to a sweltering 36°C (98°F). Expect approximately 20 mm (0.8 in) of precipitation spread over 3 days, paired with an average humidity level of 59%. Embrace the variety that October brings!

October Temperature in Walnut Creek

In October in Walnut Creek, the average temperature is 19°C (67°F). Maximum temperatures can reach 36°C (98°F), while minimums can plummet to as low as 0°C (32°F). Be prepared for a wide range of temperatures if you're planning to travel during this time!

October Weather in Walnut Creek: Daily Temperature Highs, Lows, and Averages

The chart illustrates October temperature patterns in Walnut Creek, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Walnut Creek, October typically has an average temperature of 19°C (67°F), with highs reaching up to 36°C (98°F) and lows dropping to around 0°C (32°F).
JanFebMarAprMayJunJulAugSepOctNovDec474956667385898981675747
Data source: Temperature data for Walnut Creek 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 Walnut Creek

In Walnut Creek in October, the precipitation amount is 20 mm (0.8 in) accumulated over a period of 3 days.

October Precipitation Trends in Walnut Creek

The chart displays monthly precipitation patterns in Walnut Creek, 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 Walnut Creek, October typically receives around 20 mm (0.8 inches) of precipitation spread over approximately 3 days.
JanFebMarAprMayJunJulAugSepOctNovDec282936872331415202621
Data source: Precipitation data for October generated using information from the Copernicus Climate Change Service.
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October Humidity in Walnut Creek

In Walnut Creek in October humidity is 59%. With an average temperature of 19°C (67°F), this humidity feels like a gentle embrace that can be refreshing during sightseeing but may feel a bit sticky if you're on the move for extended periods.

October Average Humidity in Walnut Creek

This chart illustrates the average monthly humidity levels in Walnut Creek, 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 Walnut Creek is approximately 59%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec77%80%68%58%45%31%27%30%48%60%70%77%
Data source: Humidity data for October generated using information from the Copernicus Climate Change Service.

October UV Index in Walnut Creek

In Walnut Creek 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 Walnut Creek.

Maximum UV Index Levels in Walnut Creek for October

The chart shows the monthly maximum UV Index (UVI) for Walnut Creek 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 Walnut Creek typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec468101112121110754
Data source: Walnut Creek 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 Walnut Creek Compares to Other Months

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

This table compares monthly weather conditions in Walnut Creek, showing how October’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather8°C (47°F)28 mm (1.1 inches)77%moderate
February Weather10°C (49°F)29 mm (1.1 inches)80%high
March Weather13°C (56°F)36 mm (1.4 inches)68%very high
April Weather19°C (67°F)8 mm (0.3 inches)58%very high
May Weather23°C (74°F)7 mm (0.3 inches)45%extreme
June Weather30°C (86°F)1 mm (0.1 inches)31%extreme
July Weather32°C (89°F)32 mm (1.3 inches)27%extreme
August Weather32°C (89°F)14 mm (0.6 inches)30%extreme
September Weather27°C (81°F)15 mm (0.6 inches)48%very high
October Weather19°C (67°F)20 mm (0.8 inches)59%high
November Weather14°C (57°F)26 mm (1.0 inches)70%moderate
December Weather8°C (47°F)21 mm (0.8 inches)77%moderate

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