Big Falls, MN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Big Falls, a city in Koochiching County, Minnesota.
Tonight
47°F
Mostly Cloudy
Mostly cloudy, with a low around 47. Southeast wind around 0 mph.
7-day forecast for Big Falls
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 47°F | Mostly Cloudy | 0 mph | 1% |
| Saturday | 68°F | Partly Sunny | 0 to 5 mph SE | 2% |
| Saturday Night | 45°F | Mostly Cloudy | 0 to 5 mph N | 1% |
| Sunday | 63°F | Partly Sunny | 5 mph NE | 0% |
| Sunday Night | 36°F | Mostly Cloudy then Patchy Frost | 0 to 5 mph E | 0% |
| Monday | 63°F | Patchy Frost then Mostly Sunny | 0 to 5 mph SE | 0% |
| Monday Night | 34°F | Mostly Clear | 0 to 5 mph SE | 0% |
| Tuesday | 65°F | Sunny | 0 to 5 mph SE | 0% |
| Tuesday Night | 37°F | Mostly Clear | 0 to 5 mph SE | 0% |
| Wednesday | 65°F | Mostly Sunny | 0 to 10 mph S | 1% |
| Wednesday Night | 43°F | Partly Cloudy | 5 mph S | 10% |
| Thursday | 68°F | Partly Sunny | 5 mph S | 10% |
| Thursday Night | 46°F | Partly Cloudy | 0 to 5 mph S | 9% |
| Friday | 70°F | Mostly Sunny | 5 mph S | 6% |
Forecast source: National Weather Service (api.weather.gov) for Big Falls (48.180, -93.809). Updated through the day.
Growing snapshot for Big Falls
Last spring frost
May 24
First fall frost
Sep 20
Growing season
117 days
Hardiness zone
3b
More local growing data for Big Falls: nearby ZIP 56658 weather · frost dates · planting calendar · Minnesota frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Big Falls, Mn (8.5 mi from Big Falls). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.