nomadseason

May Weather in Richland, United States

Last updated: June 24, 2025

In May, the average temperature in Richland, United States hovers around 15°C (60°F), offering a pleasant climate. However, temperatures can vary significantly, with a minimum of -3°C (27°F) and a maximum reaching 35°C (95°F). Rainfall is also common, with about 152 mm (6.0 in) of precipitation spread over 16 days. The air tends to be quite humid, with an average humidity of 82% contributing to the overall atmosphere of the region.

May Temperature in Richland

In May in Richland, the average temperature is 15°C (60°F), with maximums reaching up to 35°C (95°F) and minimums dipping as low as -3°C (27°F). This makes Richland a destination where travelers should be prepared for a wide range of temperatures.

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 15°C (60°F), with highs reaching up to 35°C (95°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.
Choose your preferred temperature unit
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 152 mm (6.0 in) distributed over 16 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 152 mm (6.0 inches) of precipitation spread over approximately 16 days.
JanFebMarAprMayJunJulAugSepOctNovDec7275769015211896781031366867
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

May Humidity in Richland

In Richland in May humidity is 82%. With an average temperature of 15°C (60°F), this humidity feels like a heavy blanket wrapping around you, making outdoor activities feel sticky and draining, which can hinder your travel experience.

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 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 May generated using information from the Copernicus Climate Change Service.

May UV Index in Richland

In Richland in May, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, 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 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec34689101097532
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 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

Compare Richland's Climate with Cities Worldwide