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October Weather in Richland, United States

Last updated: June 24, 2025

In October, the average temperature in Richland, United States is a pleasant 21°C (71°F). However, temperatures can vary significantly, ranging from a chilly 2°C (36°F) to a scorching 35°C (95°F). Expect some rain, with an average precipitation of 114 mm (4.5 in) occurring over about 8 days. The air tends to be quite humid, with an average humidity level of 77%, making it feel even warmer.

October Temperature in Richland

In October in Richland, the average temperature is 21°C (71°F), with maximums reaching 35°C (95°F) and minimums dropping as low as 2°C (36°F). This varied climate makes Richland an exciting destination for travelers seeking both warmth and cooler respite.

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 21°C (71°F), with highs reaching up to 35°C (95°F) and lows dropping to around 2°C (36°F).
JanFebMarAprMayJunJulAugSepOctNovDec505661667479818178705752
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 total precipitation amount is 114 mm (4.5 in) spread over a duration of 8 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 114 mm (4.5 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec9911492115939410911810211559130
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 77%. With an average temperature of 21°C (71°F), this humidity feels like a warm embrace that envelops you, making it both refreshing and slightly heavy, which can be a bit tiring for traveling.

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 77%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%82%80%76%73%74%80%79%83%77%84%88%
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 is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to 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 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec479101111111110864
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 Weather10°C (50°F)99 mm (3.9 inches)85%moderate
February Weather13°C (57°F)114 mm (4.5 inches)82%high
March Weather16°C (61°F)92 mm (3.6 inches)80%very high
April Weather19°C (66°F)115 mm (4.5 inches)76%very high
May Weather23°C (75°F)93 mm (3.7 inches)73%extreme
June Weather26°C (79°F)94 mm (3.7 inches)74%extreme
July Weather27°C (82°F)109 mm (4.3 inches)80%extreme
August Weather27°C (81°F)118 mm (4.6 inches)79%extreme
September Weather26°C (79°F)102 mm (4.0 inches)83%very high
October Weather21°C (71°F)114 mm (4.5 inches)77%very high
November Weather14°C (57°F)59 mm (2.3 inches)84%high
December Weather11°C (53°F)130 mm (5.1 inches)88%moderate

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