May Weather in South Lyon, United States

Last updated: June 24, 2025

In May, the average temperature in South Lyon, United States hovers around 15°C (60°F). Temperatures can range from a brisk -2°C (28°F) to a sweltering 34°C (93°F). Be prepared for 111 mm (4.4 in) of precipitation spread over 15 days, contributing to an average humidity level of 80%.

May Temperature in South Lyon

In May in South Lyon, the average temperature is 15°C (60°F), with maximums reaching up to 34°C (93°F) and minimums dropping as low as -2°C (28°F). Travelers should be prepared for a wide range of temperatures and pack accordingly.

May Weather in South Lyon: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in South Lyon, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In South Lyon, May typically has an average temperature of 15°C (60°F), with highs reaching up to 34°C (93°F) and lows dropping to around -2°C (28°F).

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

May Precipitation in South Lyon

In South Lyon in May, the total precipitation amount is 111 mm (4.4 in) spread over 15 days.

May Precipitation Trends in South Lyon

The chart displays monthly precipitation patterns in South Lyon, 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 South Lyon, May typically receives around 111 mm (4.4 inches) of precipitation spread over approximately 15 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 South Lyon

In South Lyon in May humidity is 80%. With an average temperature of 15°C (60°F), this humidity feels like a warm, sticky embrace that can make even the simplest stroll feel like a workout, leaving travelers yearning for a refreshing breeze or shade to escape the weight of the air.

May Average Humidity in South Lyon

This chart illustrates the average monthly humidity levels in South Lyon, 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 South Lyon is approximately 80%, 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 South Lyon

In South Lyon 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 South Lyon.

Maximum UV Index Levels in South Lyon for May

The chart shows the monthly maximum UV Index (UVI) for South Lyon 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 South Lyon typically reaches 9, which falls under the very high exposure category.

Data source: South Lyon 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 South Lyon Compares to Other Months

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

This table compares monthly weather conditions in South Lyon, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-3°C (26°F)	63 mm (2.5 inches)	88%	low
February Weather	-3°C (28°F)	66 mm (2.6 inches)	87%	moderate
March Weather	3°C (37°F)	72 mm (2.8 inches)	85%	moderate
April Weather	8°C (47°F)	90 mm (3.6 inches)	86%	very high
May Weather	15°C (60°F)	111 mm (4.4 inches)	80%	very high
June Weather	21°C (70°F)	98 mm (3.9 inches)	80%	very high
July Weather	23°C (74°F)	90 mm (3.5 inches)	80%	very high
August Weather	22°C (72°F)	74 mm (2.9 inches)	80%	very high
September Weather	18°C (65°F)	73 mm (2.9 inches)	80%	high
October Weather	12°C (54°F)	104 mm (4.1 inches)	84%	moderate
November Weather	4°C (39°F)	74 mm (2.9 inches)	89%	moderate
December Weather	0°C (32°F)	54 mm (2.1 inches)	86%	low