Pentwater, MI Weather & Growing Conditions
Overnight
49°F
Showers And Thunderstorms
Rain showers likely before 5am, then showers and thunderstorms. Cloudy. Low around 49, with temperatures rising to around 51 overnight. East wind around 10 mph, with gusts as high as 21 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 49°F | Showers And Thunderstorms | 10 mph E | 75% |
| Saturday | 66°F | Showers And Thunderstorms | 12 mph ESE | 83% |
| Saturday Night | 50°F | Showers And Thunderstorms Likely | 5 to 9 mph ENE | 60% |
| Sunday | 70°F | Slight Chance Rain Showers then Partly Sunny | 7 to 12 mph NE | 20% |
| Sunday Night | 47°F | Mostly Cloudy | 6 to 12 mph NE | 1% |
| Monday | 66°F | Mostly Cloudy | 10 mph ENE | 3% |
| Monday Night | 45°F | Mostly Cloudy | 9 mph ENE | 4% |
| Tuesday | 66°F | Partly Sunny | 7 to 10 mph ENE | 12% |
| Tuesday Night | 46°F | Partly Cloudy then Slight Chance Rain Showers | 8 mph ENE | 20% |
| Wednesday | 67°F | Slight Chance Rain Showers then Mostly Sunny | 8 mph NE | 20% |
| Wednesday Night | 48°F | Partly Cloudy | 7 mph ENE | 11% |
| Thursday | 69°F | Partly Sunny | 7 mph NNE | 2% |
| Thursday Night | 49°F | Partly Cloudy | 2 to 6 mph NE | 3% |
| Friday | 71°F | Mostly Sunny | 2 to 7 mph NNE | 4% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Pentwater, MI
Last spring frost
May 17
First fall frost
Oct 7
Growing season
144 days
Hardiness zone
6b
Explore more for Pentwater, MI: full frost dates · planting calendar · Michigan frost dates
Climate data from the nearest NOAA station, Ludington 4 Se, Mi (7.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.