Byron, MN Weather & Growing Conditions
Tonight
57°F
Showers And Thunderstorms
Showers and thunderstorms. Some of the storms could produce heavy rain. Cloudy, with a low around 57. East wind 10 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 90%. New rainfall amounts between 1 and 2 inches possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 57°F | Showers And Thunderstorms | 10 to 14 mph E | 89% |
| Saturday | 63°F | Chance Showers And Thunderstorms | 10 mph NE | 52% |
| Saturday Night | 54°F | Chance Rain Showers then Cloudy | 12 mph N | 30% |
| Sunday | 65°F | Mostly Cloudy | 14 mph NE | 9% |
| Sunday Night | 48°F | Mostly Cloudy | 12 mph E | 8% |
| Monday | 61°F | Mostly Cloudy then Chance Rain Showers | 10 mph E | 33% |
| Monday Night | 44°F | Chance Rain Showers | 6 to 9 mph E | 33% |
| Tuesday | 60°F | Partly Sunny | 6 to 9 mph E | 10% |
| Tuesday Night | 43°F | Partly Cloudy | 2 to 6 mph E | 4% |
| Wednesday | 64°F | Sunny | 6 mph SE | 0% |
| Wednesday Night | 48°F | Partly Cloudy | 5 mph SE | 7% |
| Thursday | 67°F | Mostly Sunny | 5 mph S | 11% |
| Thursday Night | 51°F | Partly Cloudy | 5 mph S | 7% |
| Friday | 69°F | Mostly Sunny | 3 to 7 mph SE | 6% |
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 Sep 19, 2026.