January Weather in South Lyon, United States

Last updated: June 24, 2025

In South Lyon, United States, the average temperature in January hovers around -3°C (26°F). Expect a chillier side with minimum temperatures plunging to -26°C (-15°F), while the mercury can rise up to a milder 14°C (58°F). Precipitation levels reach about 63 mm (2.5 in) over 8 days, and the air is notably moist with an average humidity of 88%.

January Temperature in South Lyon

In January in South Lyon, the average temperature is -3°C (26°F), with maximums reaching 14°C (58°F) and minimums dropping to as low as -26°C (-15°F). Travelers should be prepared for a wide range of temperatures and dress in layers to stay comfortable during their visit.

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

The chart illustrates January 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, January typically has an average temperature of -3°C (26°F), with highs reaching up to 14°C (58°F) and lows dropping to around -26°C (-15°F).

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

January Precipitation in South Lyon

In South Lyon in January, the precipitation amount is 63 mm (2.5 in) spread over 8 days.

January Precipitation Trends in South Lyon

The chart displays monthly precipitation patterns in South Lyon, with values for each month alongside January’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how January’s conditions compare to those of other months. In South Lyon, January typically receives around 63 mm (2.5 inches) of precipitation spread over approximately 8 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

January Humidity in South Lyon

In South Lyon in January humidity is 88%. With an average temperature of -3°C (26°F), this humidity feels like an icy dampness that clings to your skin, making every breath feel colder and more challenging, which can make traveling in these conditions quite uncomfortable.

January Average Humidity in South Lyon

This chart illustrates the average monthly humidity levels in South Lyon, with January’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In January, average humidity in South Lyon is approximately 88%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in South Lyon

In South Lyon in January, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in South Lyon, you can visit Hourly UV Index in South Lyon.

Maximum UV Index Levels in South Lyon for January

The chart shows the monthly maximum UV Index (UVI) for South Lyon in January, 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 January, the maximum UV index in South Lyon typically reaches 2, which falls under the low exposure category.

Data source: South Lyon January 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 January 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 January’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 January’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