Big Falls, MN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Big Falls, a city in Koochiching County, Minnesota.
Today
70°F
Mostly Sunny
Mostly sunny. High near 70, with temperatures falling to around 68 in the afternoon. West wind 5 to 10 mph, with gusts as high as 25 mph.
7-day forecast for Big Falls
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 70°F | Mostly Sunny | 5 to 10 mph W | 0% |
| Tonight | 46°F | Mostly Clear | 0 to 10 mph SW | 0% |
| Wednesday | 75°F | Sunny | 5 to 10 mph SW | 0% |
| Wednesday Night | 58°F | Partly Cloudy | 5 mph SW | 5% |
| Thursday | 80°F | Mostly Sunny | 5 to 10 mph SW | 5% |
| Thursday Night | 57°F | Mostly Clear | 5 to 10 mph SW | 10% |
| Friday | 79°F | Sunny | 5 to 10 mph W | 12% |
| Friday Night | 52°F | Mostly Clear then Slight Chance Rain Showers | 0 to 10 mph W | 21% |
| Saturday | 75°F | Slight Chance Rain Showers then Mostly Sunny | 0 to 10 mph W | 21% |
| Saturday Night | 52°F | Slight Chance Rain Showers | 0 to 5 mph NW | 17% |
| Sunday | 75°F | Mostly Sunny | 0 to 10 mph NW | 13% |
| Sunday Night | 53°F | Partly Cloudy then Slight Chance Rain Showers | 0 to 5 mph NW | 15% |
| Monday | 75°F | Slight Chance Rain Showers then Mostly Sunny | 0 to 5 mph NW | 15% |
| Monday Night | 53°F | Partly Cloudy | 0 to 5 mph N | 13% |
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 Aug 4, 2026.