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
46°F
Slight Chance Rain Showers then Mostly Cloudy
A slight chance of rain showers before midnight. Mostly cloudy, with a low around 46. North wind 0 to 5 mph. Chance of precipitation is 20%.
7-day forecast for Big Falls
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 46°F | Slight Chance Rain Showers then Mostly Cloudy | 0 to 5 mph N | 21% |
| Sunday | 62°F | Partly Sunny | 5 mph NE | 0% |
| Sunday Night | 35°F | Mostly Cloudy then Patchy Frost | 0 to 5 mph E | 0% |
| Monday | 63°F | Patchy Frost then Sunny | 0 to 5 mph SE | 0% |
| Monday Night | 34°F | Mostly Clear then Patchy Frost | 0 mph | 0% |
| Tuesday | 64°F | Areas Of Frost then Sunny | 0 to 5 mph SE | 0% |
| Tuesday Night | 36°F | Clear | 5 mph SE | 0% |
| Wednesday | 65°F | Sunny | 5 to 10 mph SE | 0% |
| Wednesday Night | 42°F | Mostly Clear | 5 mph SE | 3% |
| Thursday | 66°F | Chance Rain Showers | 5 to 10 mph S | 27% |
| Thursday Night | 48°F | Chance Rain Showers then Mostly Cloudy | 0 to 5 mph S | 27% |
| Friday | 71°F | Partly Sunny | 0 to 5 mph S | 4% |
| Friday Night | 51°F | Partly Cloudy | 5 mph S | 7% |
| Saturday | 70°F | Partly Sunny then Slight Chance Rain Showers | 5 to 10 mph S | 21% |
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 20, 2026.