Janesville, MN Weather & Growing Conditions
Today
62°F
Chance Drizzle
A chance of drizzle before 2pm. Cloudy, with a high near 62. Northeast wind around 5 mph. Chance of precipitation is 30%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 62°F | Chance Drizzle | 5 mph NE | 31% |
| Tonight | 56°F | Cloudy | 5 to 10 mph NNE | 7% |
| Sunday | 66°F | Partly Sunny | 10 to 15 mph NE | 4% |
| Sunday Night | 49°F | Mostly Cloudy | 10 mph ENE | 7% |
| Monday | 61°F | Mostly Cloudy | 5 to 10 mph ENE | 13% |
| Monday Night | 44°F | Mostly Cloudy | 5 mph ENE | 9% |
| Tuesday | 62°F | Mostly Sunny | 5 mph E | 4% |
| Tuesday Night | 42°F | Mostly Clear | 5 mph ESE | 1% |
| Wednesday | 65°F | Sunny | 5 mph SE | 2% |
| Wednesday Night | 48°F | Mostly Clear | 5 mph SE | 9% |
| Thursday | 66°F | Mostly Sunny | 5 mph SSE | 11% |
| Thursday Night | 50°F | Partly Cloudy | 0 to 5 mph SE | 7% |
| Friday | 69°F | Mostly Sunny | 5 mph SE | 4% |
| Friday Night | 52°F | Partly Cloudy | 5 mph SE | 12% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Janesville, MN
Last spring frost
May 2
First fall frost
Oct 4
Growing season
155 days
Hardiness zone
5a
Explore more for Janesville, MN: full frost dates · planting calendar · Minnesota frost dates
Climate data from the nearest NOAA station, Waseca S Rsch & Outreach Ctr, Mn (9.4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.