Jerome, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Jerome, a village in Sangamon County, Illinois.
This Afternoon
72°F
Light Rain
Rain and a slight chance of thunderstorms. Cloudy, with a high near 72. South southeast wind around 21 mph, with gusts as high as 35 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast for Jerome
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 72°F | Light Rain | 21 mph SSE | 87% |
| Tonight | 54°F | Rain | 12 to 18 mph S | 80% |
| Wednesday | 60°F | Chance Rain Showers then Mostly Cloudy | 10 to 14 mph SW | 11% |
| Wednesday Night | 45°F | Mostly Cloudy | 9 mph SW | 1% |
| Thursday | 61°F | Mostly Sunny | 8 to 12 mph WSW | 4% |
| Thursday Night | 44°F | Mostly Cloudy then Slight Chance Light Rain | 6 mph NW | 22% |
| Friday | 56°F | Mostly Cloudy | 6 to 9 mph NNW | 12% |
| Friday Night | 38°F | Mostly Cloudy | 1 to 8 mph NNW | 4% |
| Saturday | 54°F | Mostly Sunny | 1 to 5 mph NW | 1% |
| Saturday Night | 36°F | Partly Cloudy | 2 mph W | 1% |
| Sunday | 60°F | Sunny | 2 to 8 mph W | 7% |
| Sunday Night | 36°F | Mostly Clear | 6 mph WNW | 5% |
| Monday | 64°F | Sunny | 3 to 9 mph SW | 2% |
| Monday Night | 41°F | Mostly Clear | 3 to 7 mph WSW | 1% |
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 Nov 3, 2026.