St. Louis, MI Weather & Growing Conditions
Tonight
50°F
Rain Showers Likely
Rain showers likely. Cloudy. Low around 50, with temperatures rising to around 53 overnight. East wind around 7 mph. Chance of precipitation is 60%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 50°F | Rain Showers Likely | 7 mph E | 57% |
| Saturday | 64°F | Rain Showers | 5 to 8 mph E | 76% |
| Saturday Night | 53°F | Showers And Thunderstorms Likely | 5 to 9 mph ENE | 70% |
| Sunday | 68°F | Chance Rain Showers | 8 to 13 mph NE | 41% |
| Sunday Night | 48°F | Mostly Cloudy | 8 to 12 mph NE | 8% |
| Monday | 63°F | Mostly Cloudy | 12 to 16 mph NE | 5% |
| Monday Night | 45°F | Mostly Cloudy | 9 to 16 mph NE | 5% |
| Tuesday | 62°F | Partly Sunny then Slight Chance Rain Showers | 10 to 16 mph NE | 16% |
| Tuesday Night | 46°F | Slight Chance Rain Showers | 9 to 16 mph ENE | 21% |
| Wednesday | 64°F | Chance Rain Showers | 13 mph ENE | 37% |
| Wednesday Night | 47°F | Chance Rain Showers then Mostly Cloudy | 5 to 10 mph NE | 28% |
| Thursday | 67°F | Partly Sunny | 6 to 9 mph NE | 8% |
| Thursday Night | 47°F | Mostly Cloudy | 3 to 8 mph NNE | 6% |
| Friday | 71°F | Mostly Sunny | 3 to 7 mph NNE | 5% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for St. Louis, MI
Last spring frost
May 1
First fall frost
Oct 13
Growing season
164 days
Hardiness zone
6a
Explore more for St. Louis, MI: full frost dates · planting calendar · Michigan frost dates
Climate data from the nearest NOAA station, Alma, Mi (6.1 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.