Watseka, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Watseka, a city in Iroquois County, Illinois.
This Afternoon
74°F
Slight Chance Rain Showers
A slight chance of rain showers. Partly sunny. High near 74, with temperatures falling to around 70 in the afternoon. South wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 20%.
7-day forecast for Watseka
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 74°F | Slight Chance Rain Showers | 15 mph S | 19% |
| Tonight | 60°F | Rain Showers | 15 to 20 mph S | 78% |
| Wednesday | 65°F | Chance Rain Showers then Mostly Cloudy | 10 to 15 mph SSW | 41% |
| Wednesday Night | 47°F | Mostly Cloudy | 10 mph SW | 5% |
| Thursday | 62°F | Partly Sunny | 5 to 15 mph WSW | 5% |
| Thursday Night | 43°F | Mostly Cloudy then Slight Chance Rain Showers | 0 to 5 mph WNW | 23% |
| Friday | 56°F | Slight Chance Rain Showers then Partly Sunny | 0 to 5 mph NNW | 24% |
| Friday Night | 35°F | Partly Cloudy | 0 to 5 mph NNW | 9% |
| Saturday | 54°F | Mostly Sunny | 0 mph | 6% |
| Saturday Night | 32°F | Partly Cloudy | 0 mph | 3% |
| Sunday | 60°F | Mostly Sunny | 0 to 5 mph W | 10% |
| Sunday Night | 32°F | Mostly Clear | 0 to 5 mph WNW | 10% |
| Monday | 63°F | Sunny | 0 to 5 mph WSW | 5% |
| Monday Night | 38°F | Mostly Clear | 0 to 5 mph WSW | 2% |
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 Nov 4, 2026.