Byron, MN Weather & Growing Conditions
Today
73°F
Mostly Cloudy then Scattered Rain Showers
Scattered rain showers after 3pm. Mostly cloudy. High near 73, with temperatures falling to around 70 in the afternoon. Northwest wind around 10 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 73°F | Mostly Cloudy then Scattered Rain Showers | 10 mph NW | 27% |
| Tonight | 56°F | Scattered Rain Showers then Mostly Cloudy | 3 to 8 mph W | 31% |
| Wednesday | 74°F | Mostly Sunny | 2 to 6 mph NW | 1% |
| Wednesday Night | 55°F | Mostly Clear | 5 mph SW | 0% |
| Thursday | 78°F | Sunny | 5 to 10 mph SW | 0% |
| Thursday Night | 61°F | Mostly Clear | 9 mph S | 1% |
| Friday | 81°F | Sunny | 9 to 14 mph SW | 13% |
| Friday Night | 64°F | Mostly Clear | 9 to 13 mph SW | 14% |
| Saturday | 82°F | Sunny | 8 to 13 mph S | 11% |
| Saturday Night | 66°F | Chance Showers And Thunderstorms | 9 to 14 mph SW | 41% |
| Sunday | 82°F | Chance Showers And Thunderstorms | 10 mph SW | 41% |
| Sunday Night | 65°F | Slight Chance Showers And Thunderstorms | 6 to 9 mph NE | 36% |
| Monday | 81°F | Chance Showers And Thunderstorms | 7 to 10 mph E | 36% |
| Monday Night | 64°F | Slight Chance Showers And Thunderstorms | 9 mph N | 24% |
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 Aug 4, 2026.