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May Weather in Saint Paul, United States

Last updated: June 24, 2025

In May, the average temperature in Saint Paul, United States is a comfortable 18°C (65°F). However, temperatures can vary significantly, with minimums dropping to -1°C (30°F) and maximums soaring to 33°C (92°F). Expect 136 mm (5.4 in) of precipitation over 14 days, contributing to an average humidity of around 79%. Prepare accordingly!

May Temperature in Saint Paul

In May in Saint Paul, the weather can be quite varied, offering a pleasant average temperature of 18°C (65°F) ideal for outdoor activities, but travelers should be prepared for maximum highs of 33°C (92°F) and potential chilly lows of -1°C (30°F), making it essential to pack accordingly.

May Weather in Saint Paul: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Saint Paul, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Saint Paul, May typically has an average temperature of 18°C (65°F), with highs reaching up to 33°C (92°F) and lows dropping to around -1°C (30°F).
JanFebMarAprMayJunJulAugSepOctNovDec313543536573767470584237
Data source: Temperature data for Saint Paul 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 Saint Paul

In Saint Paul in May, the precipitation amount is 136 mm (5.4 in) over a span of 14 days.

May Precipitation Trends in Saint Paul

The chart displays monthly precipitation patterns in Saint Paul, 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 Saint Paul, May typically receives around 136 mm (5.4 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec811031401131361151098878979796
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Saint Paul

In Saint Paul in May, humidity is 79%. With an average temperature of 18°C (65°F), this humidity feels like walking through a warm mist, making traveling slightly uncomfortable and sticky, but offering a refreshing escape when you find moments of shade or a breeze.

May Average Humidity in Saint Paul

This chart illustrates the average monthly humidity levels in Saint Paul, 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 Saint Paul is approximately 79%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%85%86%84%79%82%79%70%69%76%88%87%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Saint Paul

In Saint Paul in May, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Saint Paul.

Maximum UV Index Levels in Saint Paul for May

The chart shows the monthly maximum UV Index (UVI) for Saint Paul 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 Saint Paul typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec357910111098643
Data source: Saint Paul 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 Saint Paul Compares to Other Months

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

This table compares monthly weather conditions in Saint Paul, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (31°F)81 mm (3.2 inches)87%moderate
February Weather1°C (35°F)103 mm (4.1 inches)85%moderate
March Weather6°C (44°F)140 mm (5.5 inches)86%high
April Weather12°C (53°F)113 mm (4.4 inches)84%very high
May Weather18°C (65°F)136 mm (5.4 inches)79%very high
June Weather23°C (73°F)114 mm (4.5 inches)82%extreme
July Weather25°C (77°F)109 mm (4.3 inches)79%very high
August Weather23°C (74°F)88 mm (3.5 inches)70%very high
September Weather21°C (70°F)78 mm (3.1 inches)69%very high
October Weather15°C (58°F)97 mm (3.8 inches)76%high
November Weather6°C (43°F)97 mm (3.8 inches)88%moderate
December Weather3°C (37°F)96 mm (3.8 inches)87%moderate

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