May Weather in Superior, United States

Last updated: June 24, 2025

In May, the average temperature in Superior, United States is a pleasant 23°C (74°F). However, temperatures can vary significantly, with a minimum of 8°C (46°F) and a maximum soaring to 39°C (102°F). Expect a modest precipitation amount of 8 mm (0.3 in) over the course of 2 days, and enjoy the relatively low average humidity of 40% to keep you comfortable throughout your stay.

May Temperature in Superior

In May in Superior, the average temperature is 23°C (74°F), with maximums reaching up to 39°C (102°F) and minimums dropping as low as 8°C (46°F). Travelers should be prepared for a wide range of temperatures to fully enjoy their stay.

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 23°C (74°F), with highs reaching up to 39°C (102°F) and lows dropping to around 8°C (46°F).

Data source: Temperature data for Superior generated using information from the Copernicus Climate Change Service.

May Precipitation in Superior

In Superior in May, the precipitation amount is 8 mm (0.3 in) over the course of 2 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 8 mm (0.3 inches) of precipitation spread over approximately 2 days.

Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

May Humidity in Superior

In Superior in May humidity is 40%. With average temperature 23°C (74°F), this humidity feels like a pleasant embrace, making it comfortable for traveling as you enjoy the sights without feeling overly sticky or uncomfortable.

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 40%, offering insight into how humid the weather typically is during this month.

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 is 12, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, underscoring the importance of sun protection. For 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 12, which falls under the extreme exposure category.

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.
	Temperature	Precipitation	Humidity	UV
January Weather	9°C (49°F)	59 mm (2.3 inches)	76%	moderate
February Weather	10°C (51°F)	66 mm (2.6 inches)	79%	high
March Weather	14°C (57°F)	41 mm (1.6 inches)	67%	very high
April Weather	19°C (67°F)	4 mm (0.2 inches)	55%	extreme
May Weather	23°C (74°F)	8 mm (0.3 inches)	40%	extreme
June Weather	29°C (85°F)	5 mm (0.2 inches)	33%	extreme
July Weather	30°C (86°F)	89 mm (3.5 inches)	34%	extreme
August Weather	29°C (85°F)	57 mm (2.2 inches)	48%	extreme
September Weather	27°C (80°F)	44 mm (1.7 inches)	64%	very high
October Weather	20°C (69°F)	29 mm (1.2 inches)	67%	very high
November Weather	15°C (60°F)	29 mm (1.1 inches)	77%	high
December Weather	10°C (50°F)	45 mm (1.8 inches)	82%	moderate