Heidelberg, MN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Heidelberg, a city in Le Sueur County, Minnesota.
Tonight
57°F
Patchy Fog
Patchy fog and showers and thunderstorms before 10pm, then patchy fog and a chance of showers and thunderstorms between 10pm and 1am, then patchy fog and a chance of showers and thunderstorms. Cloudy, with a low around 57. East wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast for Heidelberg
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 57°F | Patchy Fog | 10 to 15 mph E | 75% |
| Saturday | 63°F | Chance Rain Showers then Cloudy | 10 mph NE | 40% |
| Saturday Night | 54°F | Slight Chance Drizzle then Mostly Cloudy | 5 to 10 mph NNE | 17% |
| Sunday | 66°F | Partly Sunny | 10 to 15 mph NE | 2% |
| Sunday Night | 49°F | Mostly Cloudy | 5 to 10 mph ENE | 8% |
| Monday | 62°F | Chance Rain Showers | 5 to 10 mph ENE | 27% |
| Monday Night | 45°F | Chance Rain Showers then Mostly Cloudy | 5 mph ENE | 27% |
| Tuesday | 62°F | Mostly Sunny | 5 to 10 mph E | 4% |
| Tuesday Night | 44°F | Mostly Clear | 0 to 5 mph ESE | 1% |
| Wednesday | 65°F | Sunny | 5 mph SE | 1% |
| Wednesday Night | 49°F | Partly Cloudy | 0 to 5 mph SSE | 12% |
| Thursday | 68°F | Mostly Sunny | 0 to 5 mph SSE | 12% |
| Thursday Night | 51°F | Partly Cloudy | 0 to 5 mph SSE | 6% |
| Friday | 69°F | Mostly Sunny | 5 mph SE | 6% |
Forecast source: National Weather Service (api.weather.gov) for Heidelberg (44.493, -93.626). Updated through the day.
Growing snapshot for Heidelberg
Last spring frost
May 2
First fall frost
Oct 5
Growing season
153 days
Hardiness zone
4b
More local growing data for Heidelberg: nearby ZIP 56071 weather · frost dates · planting calendar · Minnesota frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Jordan 1Ssw, Mn (8.4 mi from Heidelberg). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.