St. Leo, MN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for St. Leo, a city in Yellow Medicine County, Minnesota.
Tonight
39°F
Rain
Rain and patchy fog. Cloudy. Low around 39, with temperatures rising to around 42 overnight. North northwest wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast for St. Leo
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 39°F | Rain | 15 to 20 mph NNW | 100% |
| Wednesday | 45°F | Light Rain | 15 to 20 mph NW | 97% |
| Wednesday Night | 36°F | Light Rain then Mostly Cloudy | 15 to 20 mph NNW | 91% |
| Thursday | 44°F | Partly Sunny | 10 to 15 mph NNW | 13% |
| Thursday Night | 31°F | Mostly Cloudy | 5 to 10 mph N | 2% |
| Friday | 45°F | Partly Sunny | 0 to 5 mph ESE | 0% |
| Friday Night | 30°F | Partly Cloudy | 0 to 5 mph SSW | 0% |
| Saturday | 56°F | Mostly Sunny | 5 to 10 mph WSW | 2% |
| Saturday Night | 36°F | Partly Cloudy | 5 to 10 mph W | 4% |
| Sunday | 58°F | Sunny | 5 to 10 mph WSW | 4% |
| Sunday Night | 38°F | Partly Cloudy | 5 to 10 mph SW | 1% |
| Monday | 60°F | Mostly Sunny | 5 to 10 mph W | 0% |
| Monday Night | 37°F | Mostly Clear | 5 to 10 mph WNW | 0% |
| Tuesday | 56°F | Mostly Sunny | 5 mph WNW | 0% |
Forecast source: National Weather Service (api.weather.gov) for St. Leo (44.717, -96.053). Updated through the day.
Growing snapshot for St. Leo
Last spring frost
May 2
First fall frost
Oct 5
Growing season
156 days
Hardiness zone
5a
More local growing data for St. Leo: nearby ZIP 56291 weather · frost dates · planting calendar · Minnesota frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Canby, Mn (12.2 mi from St. Leo). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.