Plymouth, IA Weather & Growing Conditions
Today
50°F
Rain Showers Likely
Rain showers likely. Cloudy. High near 50, with temperatures falling to around 48 in the afternoon. West wind 12 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 60%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 50°F | Rain Showers Likely | 12 to 15 mph W | 55% |
| Tonight | 43°F | Rain Showers Likely | 10 to 14 mph WNW | 70% |
| Thursday | 50°F | Chance Rain Showers then Cloudy | 15 mph NNW | 38% |
| Thursday Night | 34°F | Mostly Cloudy | 5 to 12 mph N | 4% |
| Friday | 46°F | Mostly Sunny | 3 to 7 mph NNE | 1% |
| Friday Night | 26°F | Partly Cloudy | 2 mph NNW | 0% |
| Saturday | 50°F | Sunny | 1 to 6 mph SW | 0% |
| Saturday Night | 33°F | Mostly Clear | 5 mph W | 2% |
| Sunday | 55°F | Sunny | 7 mph W | 3% |
| Sunday Night | 34°F | Mostly Clear | 5 mph SW | 0% |
| Monday | 61°F | Sunny | 5 to 10 mph SW | 0% |
| Monday Night | 38°F | Mostly Clear | 6 mph WNW | 0% |
| Tuesday | 59°F | Mostly Sunny | 5 mph NW | 0% |
| Tuesday Night | 38°F | Partly Cloudy | 3 mph SSW | 1% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Plymouth, IA
Last spring frost
Apr 29
First fall frost
Oct 7
Growing season
161 days
Hardiness zone
5a
Explore more for Plymouth, IA: full frost dates · planting calendar · Iowa frost dates
Climate data from the nearest NOAA station, Mason City, Ia (8.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.