Watseka, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Watseka, a city in Iroquois County, Illinois.
This Afternoon
77°F
Slight Chance Rain Showers
A slight chance of rain showers. Partly sunny, with a high near 77. East wind around 10 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Watseka
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 77°F | Slight Chance Rain Showers | 10 mph E | 21% |
| Tonight | 64°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 5 to 10 mph ESE | 15% |
| Saturday | 82°F | Chance Showers And Thunderstorms | 5 to 10 mph SSE | 54% |
| Saturday Night | 68°F | Chance Showers And Thunderstorms | 5 mph SW | 62% |
| Sunday | 76°F | Showers And Thunderstorms Likely | 5 to 10 mph NNE | 68% |
| Sunday Night | 56°F | Showers And Thunderstorms Likely | 5 to 10 mph NE | 66% |
| Monday | 67°F | Showers And Thunderstorms Likely | 10 mph ENE | 66% |
| Monday Night | 51°F | Chance Showers And Thunderstorms | 5 to 10 mph NE | 41% |
| Tuesday | 66°F | Slight Chance Rain Showers | 5 to 10 mph NE | 23% |
| Tuesday Night | 51°F | Slight Chance Rain Showers then Mostly Cloudy | 5 mph NNE | 16% |
| Wednesday | 68°F | Partly Sunny | 5 mph NNE | 7% |
| Wednesday Night | 52°F | Mostly Cloudy | 0 to 5 mph NNE | 7% |
| Thursday | 71°F | Partly Sunny | 0 to 5 mph NNE | 3% |
| Thursday Night | 53°F | Partly Cloudy | 0 to 5 mph NNE | 3% |
Forecast source: National Weather Service (api.weather.gov) for Watseka (40.775, -87.730). Updated through the day.
Growing snapshot for Watseka
Last spring frost
Apr 24
First fall frost
Oct 16
Growing season
174 days
Hardiness zone
5b
More local growing data for Watseka: nearby ZIP 60970 weather · frost dates · planting calendar · Illinois frost dates
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Iroquois
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Onarga
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Sheldon
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Climate data from the nearest NOAA station, Watseka 2 Nw, Il (0.7 mi from Watseka). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.