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October Weather in Richland, United States

Last updated: June 24, 2025

In Richland, United States, the average temperature in October hovers around 12°C (53°F). Expect chilly nights with a minimum of -3°C (27°F), while daytime highs can reach up to 29°C (85°F). This month brings an average of 136 mm (5.4 in) of precipitation, spread over 14 days, and a notable average humidity of 82%. Be prepared for a variety of weather conditions!

October Temperature in Richland

In October in Richland, the average temperature is 12°C (53°F), with maximums reaching up to 29°C (85°F) and minimums dipping as low as -3°C (27°F). This range of temperatures makes it essential for travelers to pack layers to accommodate both warm and chilly conditions.

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

The chart illustrates October temperature patterns in Richland, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Richland, October typically has an average temperature of 12°C (53°F), with highs reaching up to 29°C (85°F) and lows dropping to around -3°C (27°F).
JanFebMarAprMayJunJulAugSepOctNovDec262737476070757266533932
Data source: Temperature data for Richland 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 Richland

In Richland in October, the precipitation amount is 136 mm (5.4 in) over a span of 14 days.

October Precipitation Trends in Richland

The chart displays monthly precipitation patterns in Richland, 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 Richland, October typically receives around 136 mm (5.4 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec7275769015211896781031366867
Data source: Precipitation data for October generated using information from the Copernicus Climate Change Service.
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October Humidity in Richland

In Richland in October, humidity is 82%. With an average temperature of 12°C (53°F), this humidity feels like a damp blanket enveloping you, making travel uncomfortable and sticky, as you navigate through the thick air that weighs heavily on your skin.

October Average Humidity in Richland

This chart illustrates the average monthly humidity levels in Richland, 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 Richland is approximately 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%87%86%87%82%81%78%79%80%82%87%86%
Data source: Humidity data for October generated using information from the Copernicus Climate Change Service.

October UV Index in Richland

In Richland in October, the maximum UV index reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check the Hourly UV Index in Richland.

Maximum UV Index Levels in Richland for October

The chart shows the monthly maximum UV Index (UVI) for Richland 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 Richland typically reaches 5, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec34689101097532
Data source: Richland 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 Richland Compares to Other Months

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

This table compares monthly weather conditions in Richland, showing how October’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-3°C (26°F)72 mm (2.8 inches)87%moderate
February Weather-3°C (27°F)75 mm (3.0 inches)87%moderate
March Weather3°C (37°F)76 mm (3.0 inches)86%high
April Weather8°C (47°F)90 mm (3.6 inches)87%very high
May Weather15°C (60°F)152 mm (6.0 inches)82%very high
June Weather21°C (70°F)118 mm (4.6 inches)81%very high
July Weather24°C (75°F)96 mm (3.8 inches)78%very high
August Weather22°C (72°F)78 mm (3.1 inches)79%very high
September Weather19°C (66°F)103 mm (4.1 inches)79%high
October Weather12°C (53°F)136 mm (5.4 inches)82%moderate
November Weather4°C (39°F)68 mm (2.7 inches)87%moderate
December Weather0°C (33°F)67 mm (2.6 inches)86%low

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