Jerome, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Jerome, a village in Sangamon County, Illinois.
Tonight
72°F
Partly Cloudy
Partly cloudy, with a low around 72. Southeast wind around 8 mph, with gusts as high as 16 mph.
7-day forecast for Jerome
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 72°F | Partly Cloudy | 8 mph SE | 5% |
| Saturday | 93°F | Partly Sunny | 9 mph SSW | 11% |
| Saturday Night | 71°F | Mostly Cloudy then Chance Showers And Thunderstorms | 7 mph SSW | 28% |
| Sunday | 87°F | Chance Rain Showers | 3 to 9 mph NNW | 53% |
| Sunday Night | 63°F | Chance Showers And Thunderstorms | 8 to 12 mph NE | 69% |
| Monday | 73°F | Showers And Thunderstorms Likely | 9 to 13 mph NE | 69% |
| Monday Night | 57°F | Chance Showers And Thunderstorms | 8 to 13 mph NE | 48% |
| Tuesday | 70°F | Chance Rain Showers then Mostly Cloudy | 12 mph NNE | 32% |
| Tuesday Night | 53°F | Mostly Cloudy | 5 to 12 mph NNE | 4% |
| Wednesday | 73°F | Partly Sunny | 6 to 9 mph NNE | 2% |
| Wednesday Night | 55°F | Partly Cloudy | 2 to 8 mph NNE | 1% |
| Thursday | 74°F | Mostly Sunny | 3 to 7 mph NNE | 3% |
| Thursday Night | 57°F | Partly Cloudy | 2 to 6 mph NNE | 5% |
| Friday | 76°F | Mostly Sunny | 2 to 7 mph NNE | 5% |
Forecast source: National Weather Service (api.weather.gov) for Jerome (39.768, -89.678). Updated through the day.
Growing snapshot for Jerome
Last spring frost
Apr 15
First fall frost
Oct 22
Growing season
188 days
Hardiness zone
6a
More local growing data for Jerome: nearby ZIP 62704 weather · frost dates · planting calendar · Illinois frost dates
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Climate data from the nearest NOAA station, Springfield #2, Il (1.6 mi from Jerome). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.