Isanti, MN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Isanti, a city in Isanti County, Minnesota.
Tonight
51°F
Patchy Fog then Light Rain
Patchy fog and a slight chance of rain before midnight, then rain and patchy fog. Cloudy, with a low around 51. North wind around 10 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Isanti
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 51°F | Patchy Fog then Light Rain | 10 mph N | 85% |
| Wednesday | 55°F | Light Rain | 5 to 10 mph N | 93% |
| Wednesday Night | 43°F | Light Rain | 10 to 15 mph NNW | 87% |
| Thursday | 48°F | Slight Chance Light Rain then Mostly Cloudy | 10 to 15 mph N | 20% |
| Thursday Night | 32°F | Mostly Cloudy | 5 to 10 mph NNE | 0% |
| Friday | 45°F | Mostly Sunny | 0 to 5 mph NE | 0% |
| Friday Night | 28°F | Partly Cloudy | 0 mph | 0% |
| Saturday | 50°F | Mostly Sunny | 0 to 5 mph SW | 1% |
| Saturday Night | 34°F | Partly Cloudy | 5 mph WSW | 5% |
| Sunday | 55°F | Mostly Sunny | 5 to 10 mph W | 7% |
| Sunday Night | 35°F | Partly Cloudy | 5 mph SSW | 0% |
| Monday | 56°F | Mostly Sunny | 5 to 10 mph SW | 1% |
| Monday Night | 37°F | Mostly Clear | 5 mph WNW | 1% |
| Tuesday | 53°F | Sunny | 5 mph WNW | 1% |
Forecast source: National Weather Service (api.weather.gov) for Isanti (45.492, -93.243). Updated through the day.
Growing snapshot for Isanti
Last spring frost
May 2
First fall frost
Oct 4
Growing season
153 days
Hardiness zone
4b
More local growing data for Isanti: nearby ZIP 55040 weather · frost dates · planting calendar · Minnesota frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Cambridge, Mn (6.4 mi from Isanti). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.