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Monthly climate in Saint Louis, Michigan, United States

Last updated: March 2, 2024

Under the Köppen–Geiger climate classification Saint Louis features a humid continental climate (Dfb). Temperatures typically range between -4 °C (24 °F) and 23 °C (74 °F) through the year, but rarely can drop to -26 °C (-15 °F) or can rise to as high as 37 °C (98 °F). The average annual precipitation amounts to about 974 mm (38.3 inches) and receives 125 rainy days on the 1 mm (0.04 inches) threshold annually. Saint Louis enjoys an average of 2769 hours of sunshine throughout the year, and daylight varies from 9 hours 0 minutes to 15 hours 20 minutes per day.

Monthly average temperatures in Saint Louis, Michigan, United States §

The warmest months in Saint Louis are June, July and August, with daily mean temperatures ranging from 20 to 23 °C (69 - 74 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -4 to -1 °C (24 - 31 °F) throughout the day. On average each year, Saint Louis experiences 78 days above 25 °C (77.0 °F) and 127 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Saint Louis, 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)		 18°C
(66°F)		 22°C
(72°F)		 28°C
(83°F)		 34°C
(93°F)		 35°C
(95°F)		 37°C
(98°F)		 34°C
(94°F)		 35°C
(95°F)		 30°C
(86°F)		 26°C
(79°F)		 16°C
(62°F)
Mean maximum 9°C
(49°F)		 13°C
(55°F)		 18°C
(65°F)		 25°C
(77°F)		 31°C
(88°F)		 33°C
(92°F)		 34°C
(94°F)		 32°C
(90°F)		 31°C
(88°F)		 27°C
(82°F)		 17°C
(63°F)		 14°C
(57°F)
Average high -1°C
(31°F)		 1°C
(34°F)		 7°C
(45°F)		 13°C
(56°F)		 20°C
(69°F)		 26°C
(79°F)		 29°C
(84°F)		 27°C
(82°F)		 23°C
(74°F)		 16°C
(61°F)		 7°C
(44°F)		 2°C
(37°F)
Daily mean -4°C
(24°F)		 -4°C
(25°F)		 2°C
(35°F)		 7°C
(46°F)		 15°C
(59°F)		 20°C
(69°F)		 23°C
(74°F)		 22°C
(71°F)		 18°C
(64°F)		 11°C
(52°F)		 3°C
(38°F)		 -1°C
(31°F)
Average low -8°C
(18°F)		 -8°C
(17°F)		 -3°C
(26°F)		 2°C
(36°F)		 9°C
(48°F)		 14°C
(58°F)		 18°C
(64°F)		 16°C
(61°F)		 12°C
(54°F)		 6°C
(44°F)		 -1°C
(31°F)		 -4°C
(25°F)
Mean minimum -20°C
(-4°F)		 -21°C
(-5°F)		 -12°C
(11°F)		 -6°C
(22°F)		 -1°C
(31°F)		 9°C
(48°F)		 12°C
(54°F)		 10°C
(50°F)		 5°C
(41°F)		 -2°C
(28°F)		 -10°C
(15°F)		 -13°C
(9°F)
Minimum -26°C
(-15°F)		 -25°C
(-12°F)		 -21°C
(-5°F)		 -9°C
(17°F)		 -3°C
(27°F)		 5°C
(41°F)		 11°C
(52°F)		 6°C
(43°F)		 1°C
(34°F)		 -5°C
(24°F)		 -16°C
(3°F)		 -26°C
(-14°F)

Compare climate in Saint Louis with other places

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

Monthly average precipitation in Saint Louis, Michigan, United States §

Saint Louis usually has the most precipitation in May, June and October, with an average of 13 rainy days and 116 mm (4.6 inches) of precipitation per month. The driest months in Saint Louis are January, March and November. On average, 57 mm (2.2 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Saint Louis, 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) 55 (2.2) 59 (2.3) 58 (2.3) 86 (3.4) 115 (4.5) 113 (4.5) 67 (2.7) 81 (3.2) 98 (3.9) 120 (4.7) 57 (2.2) 63 (2.5)
Average precipitation days (≥ 1 mm) 8 9 9 12 13 12 9 11 10 14 9 9

Monthly sunshine hours in Saint Louis, Michigan, United States §

The sunniest months in Saint Louis are June, July and August, when the sun shines an average of 10 hours 57 minutes a day. Least sunny months in Saint Louis: January, November and December receive an average of 4 hours 6 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Saint Louis, 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 102 165 227 238 283 325 353 328 274 194 156 119
Mean daily daylight hours 9h 21m 10h 30m 11h 58m 13h 27m 14h 42m 15h 20m 14h 59m 13h 52m 12h 26m 10h 57m 9h 39m 9h 0m

Solar UV radiation in Saint Louis, Michigan, United States §

Saint Louis experiences the highest level of ultraviolet (UV) radiation in May, June and August, when the maximum UV index can reach values of 9 - 10, which corresponds to the Very High category of sun exposure. January, November and December are in the Low / Moderate exposure category. In these months, the maximum values of the UV index do not exceed 3. For more detailed information, check out our hourly Saint Louis UV Index data.

Average daily maximum UV levels by month for Saint Louis, 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 8 9 10 9 9 7 5 3 2

Detailed Monthly Weather Insights for Saint Louis, Michigan, United States

Discover in-depth weather details for every month in Saint Louis. 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 Saint Louis'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.