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May Weather in Prosser, United States

Last updated: June 24, 2025

In Prosser, United States, the average temperature in May hovers around 19°C (66°F). Visitors can expect a range, with minimum temperatures dipping to 4°C (39°F) and maximums soaring up to 36°C (98°F). Rainfall is moderate, with approximately 15 mm (0.6 in) of precipitation spread over about 3 days. The air is often humid, with an average humidity level of 77%, creating a warm and inviting atmosphere.

May Temperature in Prosser

In May in Prosser, the average temperature is 19°C (66°F). The maximum can reach 36°C (98°F), while the minimum can drop to as low as 4°C (39°F). This offers a pleasant climate for travelers looking to explore the diverse activities and experiences Prosser has to offer.

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

The chart illustrates May temperature patterns in Prosser, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Prosser, May typically has an average temperature of 19°C (66°F), with highs reaching up to 36°C (98°F) and lows dropping to around 4°C (39°F).
JanFebMarAprMayJunJulAugSepOctNovDec343646556674818069534235
Data source: Temperature data for Prosser 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 Prosser

In Prosser in May, the precipitation amount is 15 mm (0.6 in) over the course of 3 days.

May Precipitation Trends in Prosser

The chart displays monthly precipitation patterns in Prosser, 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 Prosser, May typically receives around 15 mm (0.6 inches) of precipitation spread over approximately 3 days.
JanFebMarAprMayJunJulAugSepOctNovDec39392422156149243131
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Prosser

In Prosser in May, humidity is 77%. With an average temperature of 19°C (66°F), this humidity feels like a heavy blanket wrapping around you, making the air feel thick and sticky, which can be quite uncomfortable for traveling.

May Average Humidity in Prosser

This chart illustrates the average monthly humidity levels in Prosser, 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 Prosser is approximately 77%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%86%86%82%77%79%77%62%60%80%87%86%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Prosser

In Prosser 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 Prosser.

Maximum UV Index Levels in Prosser for May

The chart shows the monthly maximum UV Index (UVI) for Prosser 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 Prosser typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2356991097532
Data source: Prosser 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 Prosser Compares to Other Months

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

This table compares monthly weather conditions in Prosser, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather1°C (34°F)39 mm (1.5 inches)85%low
February Weather2°C (36°F)39 mm (1.5 inches)86%moderate
March Weather8°C (46°F)24 mm (0.9 inches)86%moderate
April Weather13°C (55°F)22 mm (0.9 inches)82%high
May Weather19°C (66°F)15 mm (0.6 inches)77%very high
June Weather23°C (74°F)6 mm (0.2 inches)79%very high
July Weather27°C (81°F)1 mm (0.0 inches)77%very high
August Weather27°C (80°F)4 mm (0.1 inches)62%very high
September Weather20°C (69°F)9 mm (0.3 inches)60%high
October Weather12°C (53°F)24 mm (1.0 inches)80%moderate
November Weather5°C (42°F)31 mm (1.2 inches)87%moderate
December Weather2°C (35°F)31 mm (1.2 inches)86%low

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