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October Weather in Richland, United States

Last updated: June 24, 2025

In October, the average temperature in Richland, United States hovers around 15°C (59°F). Prepare for a wide range of temperatures, as the minimum can drop to -4°C (25°F), while the maximum can soar to 32°C (90°F). Be mindful of the weather, as you can expect 134 mm (5.3 in) of precipitation spread over approximately 11 days, along with an average humidity of 70%.

October Temperature in Richland

In October in Richland, the average temperature is 15°C (59°F), with maximums reaching 32°C (90°F) and minimums dropping as low as -4°C (25°F). Travelers should be prepared for a wide range of temperatures and pack accordingly for both warm days and chilly nights.

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 15°C (59°F), with highs reaching up to 32°C (90°F) and lows dropping to around -4°C (25°F).
JanFebMarAprMayJunJulAugSepOctNovDec343748556675797672594641
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 134 mm (5.3 in) spread over 11 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 134 mm (5.3 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec7981130148165959891511346452
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 70%. With an average temperature of 15°C (59°F), this humidity feels like a warm embrace, making it slightly uncomfortable while traveling, as the moist air clings to your skin and can leave you feeling slightly lethargic.

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 70%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec81%78%76%78%83%83%78%68%64%70%83%87%
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 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 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 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec36710101111109753
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 Weather1°C (34°F)79 mm (3.1 inches)81%moderate
February Weather3°C (37°F)80 mm (3.2 inches)78%high
March Weather9°C (49°F)130 mm (5.1 inches)76%high
April Weather13°C (55°F)148 mm (5.8 inches)78%very high
May Weather19°C (66°F)165 mm (6.5 inches)83%very high
June Weather24°C (76°F)95 mm (3.7 inches)83%extreme
July Weather26°C (79°F)98 mm (3.9 inches)78%extreme
August Weather25°C (76°F)91 mm (3.6 inches)68%very high
September Weather22°C (73°F)51 mm (2.0 inches)64%very high
October Weather15°C (59°F)134 mm (5.3 inches)70%high
November Weather8°C (46°F)64 mm (2.5 inches)83%moderate
December Weather5°C (41°F)52 mm (2.1 inches)87%moderate

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