Garwin, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Garwin, a city in Tama County, Iowa.
Overnight
66°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms before 4am, then patchy fog and a chance of showers and thunderstorms. Mostly cloudy. Low around 66, with temperatures rising to around 68 overnight. Southeast wind around 8 mph. Chance of precipitation is 50%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast for Garwin
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 66°F | Chance Showers And Thunderstorms | 8 mph SE | 50% |
| Saturday | 80°F | Showers And Thunderstorms Likely | 9 mph SW | 66% |
| Saturday Night | 60°F | Chance Showers And Thunderstorms | 7 to 10 mph N | 37% |
| Sunday | 66°F | Chance Rain Showers | 10 to 14 mph NE | 38% |
| Sunday Night | 54°F | Chance Rain Showers | 13 mph ENE | 45% |
| Monday | 62°F | Chance Rain Showers | 13 mph NE | 45% |
| Monday Night | 49°F | Chance Rain Showers | 7 to 10 mph NE | 44% |
| Tuesday | 60°F | Slight Chance Rain Showers then Partly Sunny | 9 mph ENE | 24% |
| Tuesday Night | 45°F | Partly Cloudy | 3 to 7 mph ENE | 3% |
| Wednesday | 65°F | Sunny | 5 mph ENE | 1% |
| Wednesday Night | 49°F | Partly Cloudy | 3 mph E | 4% |
| Thursday | 66°F | Partly Sunny | 3 mph E | 11% |
| Thursday Night | 52°F | Partly Cloudy | 2 mph E | 9% |
| Friday | 69°F | Partly Sunny | 5 mph E | 6% |
Forecast source: National Weather Service (api.weather.gov) for Garwin (42.093, -92.679). Updated through the day.
Growing snapshot for Garwin
Last spring frost
Apr 30
First fall frost
Oct 9
Growing season
162 days
Hardiness zone
5a
More local growing data for Garwin: nearby ZIP 50632 weather · frost dates · planting calendar · Iowa frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Toledo 3N, Ia (6.5 mi from Garwin). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.