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May Weather in Pierre, United States

Last updated: June 24, 2025

In Pierre, United States, the average temperature in May hovers around 15°C (59°F). However, prepare for a temperature range that can dip to a chilly -3°C (28°F) or soar to a sweltering 35°C (96°F). With 78 mm (3.1 in) of precipitation expected over about 10 days, and an average humidity level of 75%, this month promises a blend of cool and warm experiences.

May Temperature in Pierre

In May in Pierre, the average temperature is 15°C (59°F), with maximums reaching up to 35°C (96°F) and minimums dropping as low as -3°C (28°F). Travelers should be prepared for a wide range of temperatures, making layering essential for comfort.

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

The chart illustrates May temperature patterns in Pierre, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Pierre, May typically has an average temperature of 15°C (59°F), with highs reaching up to 35°C (96°F) and lows dropping to around -3°C (28°F).
JanFebMarAprMayJunJulAugSepOctNovDec201934445973787466473627
Data source: Temperature data for Pierre 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 Pierre

In Pierre in May, the precipitation amount is 78 mm (3.1 in) over the course of 10 days.

May Precipitation Trends in Pierre

The chart displays monthly precipitation patterns in Pierre, 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 Pierre, May typically receives around 78 mm (3.1 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec151938497862865360541126
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Pierre

In Pierre in May, humidity is 75%. With an average temperature of 15°C (59°F), this humidity feels like a warm blanket enveloping you, making it feel more oppressive than refreshing, which can be a challenge for travelers seeking comfort while exploring the area.

May Average Humidity in Pierre

This chart illustrates the average monthly humidity levels in Pierre, 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 Pierre is approximately 75%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec78%81%72%73%75%82%83%82%73%71%78%76%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Pierre

In Pierre 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 Pierre.

Maximum UV Index Levels in Pierre for May

The chart shows the monthly maximum UV Index (UVI) for Pierre 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 Pierre typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec25579101098532
Data source: Pierre 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 Pierre Compares to Other Months

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

This table compares monthly weather conditions in Pierre, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-7°C (20°F)15 mm (0.6 inches)78%low
February Weather-7°C (19°F)19 mm (0.8 inches)81%moderate
March Weather1°C (34°F)38 mm (1.5 inches)71%moderate
April Weather7°C (44°F)49 mm (1.9 inches)73%high
May Weather15°C (59°F)78 mm (3.1 inches)75%very high
June Weather23°C (73°F)62 mm (2.4 inches)82%very high
July Weather25°C (78°F)86 mm (3.4 inches)83%very high
August Weather23°C (74°F)53 mm (2.1 inches)82%very high
September Weather19°C (66°F)60 mm (2.3 inches)73%very high
October Weather9°C (48°F)54 mm (2.1 inches)71%moderate
November Weather2°C (36°F)11 mm (0.4 inches)78%moderate
December Weather-3°C (27°F)26 mm (1.0 inches)76%low

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