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May Weather in Superior, United States

Last updated: June 24, 2025

In May, the average temperature in Superior, United States hovers around 17°C (63°F). While the thermometer can dip to a chilly 1°C (35°F), it can also soar to a sweltering 36°C (98°F). Expect 175 mm (6.9 in) of precipitation spread over about 14 days, contributing to an average humidity of 82%. Be prepared for a range of weather conditions!

May Temperature in Superior

In May, in Superior, the average temperature is 17°C (63°F). Maximum temperatures can reach 36°C (98°F), while minimums can drop as low as 1°C (35°F). Travelers should be prepared for a wide range of temperatures, ensuring they pack appropriately for both warm days and chilly nights.

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

The chart illustrates May temperature patterns in Superior, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Superior, May typically has an average temperature of 17°C (63°F), with highs reaching up to 36°C (98°F) and lows dropping to around 1°C (35°F).
JanFebMarAprMayJunJulAugSepOctNovDec282843526377807671544234
Data source: Temperature data for Superior 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 Superior

In Superior in May, the precipitation amount is 175 mm (6.9 in) over a span of 14 days.

May Precipitation Trends in Superior

The chart displays monthly precipitation patterns in Superior, 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 Superior, May typically receives around 175 mm (6.9 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec2722814517580708468892239
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Superior

In Superior in May, humidity is 82%. With an average temperature of 17°C (63°F), this humidity feels like a warm blanket wrapping around you—comfortable yet heavy, making outdoor activities more taxing and requiring frequent breaks for hydration.

May Average Humidity in Superior

This chart illustrates the average monthly humidity levels in Superior, 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 Superior is approximately 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec75%78%67%70%82%81%80%80%74%71%79%83%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Superior

In Superior 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 Superior.

Maximum UV Index Levels in Superior for May

The chart shows the monthly maximum UV Index (UVI) for Superior 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 Superior typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3569101111109643
Data source: Superior 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 Superior Compares to Other Months

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

This table compares monthly weather conditions in Superior, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (29°F)27 mm (1.1 inches)74%moderate
February Weather-2°C (29°F)22 mm (0.9 inches)78%moderate
March Weather6°C (43°F)81 mm (3.2 inches)67%high
April Weather11°C (52°F)45 mm (1.8 inches)70%very high
May Weather17°C (63°F)175 mm (6.9 inches)82%very high
June Weather25°C (77°F)80 mm (3.1 inches)81%extreme
July Weather26°C (80°F)70 mm (2.8 inches)80%extreme
August Weather24°C (76°F)84 mm (3.3 inches)80%very high
September Weather22°C (71°F)68 mm (2.7 inches)73%very high
October Weather12°C (54°F)89 mm (3.5 inches)71%high
November Weather6°C (42°F)22 mm (0.9 inches)79%moderate
December Weather1°C (34°F)39 mm (1.5 inches)83%moderate

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