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Monthly climate in South Lyon, Michigan, United States

Last updated: March 2, 2024

Under the Köppen–Geiger climate classification South Lyon features a humid continental climate (Dfb). Temperatures typically range between -3 °C (26 °F) and 23 °C (74 °F) through the year, but rarely can drop to -27 °C (-16 °F) or can rise to as high as 34 °C (94 °F). The average annual precipitation amounts to about 968 mm (38.1 inches) and receives 135 rainy days on the 1 mm (0.04 inches) threshold annually. South Lyon enjoys an average of 2923 hours of sunshine throughout the year, and daylight varies from 9 hours 5 minutes to 15 hours 14 minutes per day.

Monthly average temperatures in South Lyon, Michigan, United States §

The warmest months in South Lyon are June, July and August, with daily mean temperatures ranging from 21 to 23 °C (70 - 74 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -3 to 0 °C (26 - 32 °F) throughout the day. On average each year, South Lyon experiences 74 days above 25 °C (77.0 °F) and 113 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in South Lyon, Michigan, United States. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Maximum 14°C
(58°F)		 19°C
(67°F)		 23°C
(74°F)		 27°C
(81°F)		 34°C
(93°F)		 34°C
(94°F)		 34°C
(94°F)		 33°C
(92°F)		 33°C
(92°F)		 29°C
(84°F)		 25°C
(77°F)		 17°C
(63°F)
Mean maximum 11°C
(51°F)		 13°C
(56°F)		 20°C
(68°F)		 24°C
(76°F)		 30°C
(87°F)		 32°C
(90°F)		 33°C
(92°F)		 32°C
(89°F)		 31°C
(88°F)		 27°C
(81°F)		 17°C
(63°F)		 14°C
(58°F)
Average high 0°C
(32°F)		 2°C
(35°F)		 7°C
(46°F)		 13°C
(56°F)		 20°C
(69°F)		 26°C
(78°F)		 28°C
(83°F)		 27°C
(81°F)		 24°C
(75°F)		 16°C
(62°F)		 7°C
(45°F)		 3°C
(38°F)
Daily mean -3°C
(26°F)		 -3°C
(28°F)		 3°C
(37°F)		 8°C
(47°F)		 15°C
(60°F)		 21°C
(70°F)		 23°C
(74°F)		 22°C
(72°F)		 18°C
(65°F)		 12°C
(54°F)		 4°C
(39°F)		 0°C
(32°F)
Average low -7°C
(20°F)		 -7°C
(20°F)		 -2°C
(29°F)		 3°C
(38°F)		 10°C
(51°F)		 16°C
(61°F)		 19°C
(66°F)		 17°C
(64°F)		 14°C
(57°F)		 8°C
(46°F)		 0°C
(33°F)		 -3°C
(27°F)
Mean minimum -19°C
(-1°F)		 -19°C
(-3°F)		 -11°C
(13°F)		 -4°C
(25°F)		 2°C
(35°F)		 10°C
(51°F)		 14°C
(57°F)		 12°C
(54°F)		 6°C
(43°F)		 -1°C
(31°F)		 -8°C
(18°F)		 -12°C
(11°F)
Minimum -26°C
(-15°F)		 -27°C
(-16°F)		 -15°C
(6°F)		 -6°C
(21°F)		 -2°C
(28°F)		 7°C
(44°F)		 13°C
(55°F)		 9°C
(48°F)		 2°C
(36°F)		 -3°C
(28°F)		 -15°C
(6°F)		 -23°C
(-8°F)

Compare climate in South Lyon with other places

Compare temperature, precipitation, sunshine, UV index in South Lyon, Michigan, United States with other places around the world.

Monthly average precipitation in South Lyon, Michigan, United States §

South Lyon usually has the most precipitation in May, June and October, with an average of 13 rainy days and 104 mm (4.1 inches) of precipitation per month. The driest months in South Lyon are January, February and December. On average, 61 mm (2.4 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in South Lyon, Michigan, United States. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Average precipitation mm (inches) 63 (2.5) 66 (2.6) 72 (2.8) 90 (3.6) 111 (4.4) 98 (3.9) 90 (3.5) 74 (2.9) 73 (2.9) 104 (4.1) 74 (2.9) 54 (2.1)
Average precipitation days (≥ 1 mm) 8 11 10 14 15 12 11 11 10 14 10 9

Monthly sunshine hours in South Lyon, Michigan, United States §

The sunniest months in South Lyon are June, July and August, when the sun shines an average of 11 hours 16 minutes a day. Least sunny months in South Lyon: January, February and December receive an average of 4 hours 33 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in South Lyon, Michigan, United States. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Mean monthly sunshine hours 108 165 245 247 293 338 360 337 286 227 170 141
Mean daily daylight hours 9h 27m 10h 33m 11h 58m 13h 24m 14h 37m 15h 14m 14h 54m 13h 48m 12h 25m 10h 59m 9h 44m 9h 5m

Solar UV radiation in South Lyon, Michigan, United States §

South Lyon experiences the highest level of ultraviolet (UV) radiation in April, June and July, when the maximum UV index can reach values of 9 - 10, which corresponds to the Very High category of sun exposure. January, February and December are in the Low / Moderate exposure category. In these months, the maximum values of the UV index do not exceed 4. For more detailed information, check out our hourly South Lyon UV Index data.

Average daily maximum UV levels by month for South Lyon, Michigan, United States. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
UV Index (month maximum) 2 4 5 9 9 10 10 9 7 5 4 2

Detailed Monthly Weather Insights for South Lyon, Michigan, United States

Discover in-depth weather details for every month in South Lyon. Click through the links below for comprehensive overviews of temperature trends, precipitation levels, sunshine hours, and solar UV radiation specifics. Whether planning a visit or simply curious about South Lyon's climate nuances, these monthly breakdowns provide the information you need for an informed understanding of what to expect throughout the year.

Each link leads to a detailed account of the typical weather conditions for that month, providing both locals and tourists with vital information to plan their daily activities, wardrobe, and travel itineraries accordingly.