Byron, MN Weather & Growing Conditions
Tonight
50°F
Showers And Thunderstorms
Showers and thunderstorms. Cloudy. Low around 50, with temperatures rising to around 53 overnight. Northwest wind around 7 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 50°F | Showers And Thunderstorms | 7 mph NW | 93% |
| Wednesday | 53°F | Rain Showers | 8 to 15 mph W | 88% |
| Wednesday Night | 44°F | Rain Showers | 13 mph W | 98% |
| Thursday | 48°F | Rain Showers Likely | 15 mph N | 71% |
| Thursday Night | 36°F | Mostly Cloudy | 7 to 12 mph N | 10% |
| Friday | 46°F | Partly Sunny | 5 to 8 mph N | 0% |
| Friday Night | 30°F | Partly Cloudy | 3 mph NW | 0% |
| Saturday | 52°F | Mostly Sunny | 2 to 8 mph SW | 0% |
| Saturday Night | 36°F | Partly Cloudy | 7 mph W | 9% |
| Sunday | 57°F | Mostly Sunny | 9 mph W | 9% |
| Sunday Night | 37°F | Mostly Clear | 8 mph SW | 2% |
| Monday | 59°F | Mostly Sunny | 8 to 14 mph SW | 0% |
| Monday Night | 39°F | Mostly Clear | 8 mph W | 1% |
| Tuesday | 56°F | Mostly Sunny | 8 mph W | 2% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Byron, MN
Last spring frost
May 12
First fall frost
Sep 28
Growing season
139 days
Hardiness zone
4b
Explore more for Byron, MN: full frost dates · planting calendar · Minnesota frost dates
Climate data from the nearest NOAA station, Byron 4North, Mn (5.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.