Heron Lake, MN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Heron Lake, a city in Jackson County, Minnesota.
Overnight
39°F
Rain Showers Likely
Rain showers likely. Cloudy, with a low around 39. Northwest wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 70%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Heron Lake
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 39°F | Rain Showers Likely | 15 mph NW | 68% |
| Wednesday | 44°F | Rain Showers | 15 to 20 mph WNW | 75% |
| Wednesday Night | 36°F | Rain Showers Likely | 15 mph NW | 72% |
| Thursday | 43°F | Mostly Cloudy | 15 mph NNW | 4% |
| Thursday Night | 30°F | Mostly Cloudy | 0 to 10 mph N | 0% |
| Friday | 43°F | Mostly Sunny | 0 mph | 0% |
| Friday Night | 27°F | Partly Cloudy | 0 to 5 mph SSE | 0% |
| Saturday | 50°F | Sunny | 5 to 10 mph SW | 1% |
| Saturday Night | 33°F | Mostly Clear | 5 mph W | 0% |
| Sunday | 54°F | Sunny | 5 to 10 mph WSW | 0% |
| Sunday Night | 36°F | Mostly Clear | 5 to 10 mph SW | 0% |
| Monday | 59°F | Sunny | 10 mph W | 0% |
| Monday Night | 37°F | Mostly Clear | 0 to 5 mph NW | 0% |
| Tuesday | 56°F | Mostly Sunny | 0 to 5 mph WNW | 1% |
Forecast source: National Weather Service (api.weather.gov) for Heron Lake (43.798, -95.320). Updated through the day.
Growing snapshot for Heron Lake
Last spring frost
Apr 30
First fall frost
Oct 10
Growing season
162 days
Hardiness zone
5a
More local growing data for Heron Lake: nearby ZIP 56137 weather · frost dates · planting calendar · Minnesota frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Windom, Mn (10.4 mi from Heron Lake). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.