Round Lake, MN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Round Lake, a city in Jackson County, Minnesota.
Today
72°F
Patchy Smoke
Patchy smoke and a chance of showers and thunderstorms. Mostly cloudy, with a high near 72. North northwest wind 5 to 15 mph. Chance of precipitation is 30%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast for Round Lake
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 72°F | Patchy Smoke | 5 to 15 mph NNW | 32% |
| Tonight | 53°F | Chance Rain Showers then Mostly Cloudy | 0 to 5 mph W | 25% |
| Wednesday | 75°F | Mostly Sunny | 0 to 5 mph S | 1% |
| Wednesday Night | 54°F | Mostly Clear | 5 mph S | 0% |
| Thursday | 80°F | Sunny | 5 to 15 mph SSW | 0% |
| Thursday Night | 62°F | Mostly Clear | 10 mph S | 2% |
| Friday | 84°F | Sunny | 10 to 15 mph SSW | 7% |
| Friday Night | 64°F | Mostly Clear | 10 mph S | 13% |
| Saturday | 86°F | Sunny | 5 to 15 mph S | 10% |
| Saturday Night | 66°F | Slight Chance Showers And Thunderstorms | 15 mph ESE | 24% |
| Sunday | 85°F | Slight Chance Showers And Thunderstorms then Mostly Sunny | 10 to 15 mph ESE | 24% |
| Sunday Night | 66°F | Partly Cloudy then Chance Showers And Thunderstorms | 10 to 15 mph E | 30% |
| Monday | 83°F | Chance Showers And Thunderstorms then Partly Sunny | 15 mph ENE | 30% |
| Monday Night | 66°F | Chance Showers And Thunderstorms | 10 to 15 mph NE | 26% |
Forecast source: National Weather Service (api.weather.gov) for Round Lake (43.537, -95.472). Updated through the day.
Growing snapshot for Round Lake
Last spring frost
Apr 30
First fall frost
Oct 10
Growing season
164 days
Hardiness zone
5a
More local growing data for Round Lake: nearby ZIP 56167 weather · frost dates · planting calendar · Minnesota frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Lake Park, Ia (8.4 mi from Round Lake). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.