Portland, MI Weather & Growing Conditions
This Afternoon
85°F
Sunny
Sunny, with a high near 85. Southwest wind around 9 mph, with gusts as high as 18 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 85°F | Sunny | 9 mph SW | 0% |
| Tonight | 60°F | Mostly Clear | 5 to 8 mph SSW | 0% |
| Wednesday | 83°F | Partly Sunny then Slight Chance Showers And Thunderstorms | 6 to 10 mph SW | 44% |
| Wednesday Night | 62°F | Chance Showers And Thunderstorms then Showers And Thunderstorms | 2 to 9 mph W | 83% |
| Thursday | 79°F | Showers And Thunderstorms | 3 to 7 mph W | 83% |
| Thursday Night | 59°F | Chance Showers And Thunderstorms then Partly Cloudy | 2 to 6 mph S | 47% |
| Friday | 83°F | Mostly Sunny | 2 to 6 mph SW | 12% |
| Friday Night | 60°F | Mostly Clear | 5 mph WSW | 12% |
| Saturday | 85°F | Sunny | 5 to 13 mph SW | 5% |
| Saturday Night | 64°F | Chance Rain Showers | 6 to 12 mph SW | 28% |
| Sunday | 86°F | Chance Rain Showers | 9 to 17 mph SW | 28% |
| Sunday Night | 65°F | Chance Rain Showers | 8 to 16 mph WSW | 47% |
| Monday | 85°F | Chance Rain Showers | 8 to 12 mph WSW | 47% |
| Monday Night | 63°F | Chance Rain Showers | 7 to 12 mph WSW | 51% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Portland, MI
Last spring frost
May 3
First fall frost
Oct 12
Growing season
161 days
Hardiness zone
6a
Explore more for Portland, MI: full frost dates · planting calendar · Michigan frost dates
Climate data from the nearest NOAA station, Ionia 2Ssw, Mi (9.4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.