Toronto, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Toronto, a city in Clinton County, Iowa.
Tonight
62°F
Showers And Thunderstorms Likely
A chance of rain showers before 11pm, then showers and thunderstorms likely between 11pm and 1am, then showers and thunderstorms. Some of the storms could produce heavy rain. Mostly cloudy. Low around 62, with temperatures rising to around 65 overnight. North wind 0 to 5 mph. Chance of precipitation is 90%. New rainfall amounts between 1 and 2 inches possible.
7-day forecast for Toronto
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 62°F | Showers And Thunderstorms Likely | 0 to 5 mph N | 90% |
| Sunday | 66°F | Rain Showers Likely | 5 to 10 mph NE | 62% |
| Sunday Night | 55°F | Chance Rain Showers | 5 to 10 mph NE | 39% |
| Monday | 63°F | Rain Showers Likely | 10 mph NE | 69% |
| Monday Night | 51°F | Rain Showers Likely | 5 mph NE | 69% |
| Tuesday | 61°F | Chance Rain Showers | 5 mph NE | 54% |
| Tuesday Night | 48°F | Mostly Cloudy | 0 to 5 mph NE | 9% |
| Wednesday | 64°F | Partly Sunny | 5 mph NE | 3% |
| Wednesday Night | 51°F | Partly Cloudy | 0 to 5 mph NE | 2% |
| Thursday | 66°F | Partly Sunny | 0 mph | 10% |
| Thursday Night | 54°F | Slight Chance Rain Showers | 0 mph | 19% |
| Friday | 69°F | Partly Sunny | 0 mph | 13% |
| Friday Night | 54°F | Mostly Cloudy | 0 mph | 11% |
| Saturday | 69°F | Mostly Sunny | 0 mph | 8% |
Forecast source: National Weather Service (api.weather.gov) for Toronto (41.903, -90.863). Updated through the day.
Growing snapshot for Toronto
Last spring frost
Apr 27
First fall frost
Oct 10
Growing season
165 days
Hardiness zone
5a
More local growing data for Toronto: nearby ZIP 52777 weather · frost dates · planting calendar · Iowa frost dates
Nearby towns & communities
Andover
Calamus
Camanche
Charlotte
Clinton
Delmar
DeWitt
Goose Lake
Grand Mound
Lost Nation
Low Moor
Welton
Wheatland
Climate data from the nearest NOAA station, Lowden, Ia (3.6 mi from Toronto). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.