Portland, MI Weather & Growing Conditions
Today
65°F
Patchy Fog
Patchy fog and showers and thunderstorms before 2pm, then patchy fog and showers and thunderstorms likely. Mostly cloudy. High near 65, with temperatures falling to around 63 in the afternoon. East southeast wind 7 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 65°F | Patchy Fog | 7 to 10 mph ESE | 93% |
| Tonight | 57°F | Patchy Fog | 5 to 8 mph E | 92% |
| Sunday | 69°F | Patchy Fog then Mostly Cloudy | 8 to 14 mph NE | 51% |
| Sunday Night | 48°F | Mostly Cloudy | 10 to 14 mph NE | 1% |
| Monday | 63°F | Mostly Cloudy | 12 to 15 mph ENE | 3% |
| Monday Night | 45°F | Mostly Cloudy | 12 to 16 mph NE | 2% |
| Tuesday | 63°F | Partly Sunny | 12 to 16 mph NE | 4% |
| Tuesday Night | 46°F | Mostly Cloudy then Chance Rain Showers | 13 to 16 mph NE | 30% |
| Wednesday | 63°F | Chance Rain Showers | 15 mph NE | 44% |
| Wednesday Night | 48°F | Chance Rain Showers then Mostly Cloudy | 7 to 14 mph NE | 44% |
| Thursday | 66°F | Partly Sunny | 8 to 12 mph NE | 6% |
| Thursday Night | 48°F | Mostly Cloudy | 5 to 9 mph NE | 6% |
| Friday | 70°F | Mostly Sunny | 6 to 10 mph NE | 6% |
| Friday Night | 47°F | Partly Cloudy | 5 to 9 mph NE | 4% |
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 Sep 19, 2026.