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May Weather in Richland, United States

Last updated: June 24, 2025

In May, the average temperature in Richland, United States is a pleasant 23°C (75°F). Temperatures can vary widely, dipping to a minimum of 9°C (48°F) and soaring up to 36°C (97°F). Expect around 93 mm (3.7 in) of precipitation over 10 days, contributing to an average humidity level of 73%. Enjoy the diverse climate while planning your adventures!

May Temperature in Richland

In May in Richland, the average temperature is 23°C (75°F). Maximum temperatures can reach as high as 36°C (97°F), while minimum temperatures can drop to as low as 9°C (48°F). Travelers can expect a warm climate with the possibility of cooler evenings, making it ideal for both outdoor activities and comfortable nights.

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

The chart illustrates May 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, May typically has an average temperature of 23°C (75°F), with highs reaching up to 36°C (97°F) and lows dropping to around 9°C (48°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.

May Precipitation in Richland

In Richland in May, the precipitation amount is 93 mm (3.7 in) over the course of 10 days.

May Precipitation Trends in Richland

The chart displays monthly precipitation patterns in Richland, with values for each month alongside May’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how May’s conditions compare to those of other months. In Richland, May typically receives around 93 mm (3.7 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec9911492115939410911810211559130
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Richland

In Richland in May, humidity is 73%. With an average temperature of 23°C (75°F), this humidity feels like a warm, sticky embrace, making traveling a bit more challenging as the air becomes thick and can leave you feeling fatigued more quickly.

May Average Humidity in Richland

This chart illustrates the average monthly humidity levels in Richland, with May’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In May, average humidity in Richland is approximately 73%, 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 May generated using information from the Copernicus Climate Change Service.

May UV Index in Richland

In Richland in May, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Richland.

Maximum UV Index Levels in Richland for May

The chart shows the monthly maximum UV Index (UVI) for Richland in May, 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 May, the maximum UV index in Richland typically reaches 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec479101111111110864
Data source: Richland May 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 May 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 May’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 May’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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