Otterville, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Otterville, a town in Jersey County, Illinois.
Tonight
72°F
Slight Chance Showers And Thunderstorms then Mostly Clear
A slight chance of showers and thunderstorms before 9pm. Mostly clear, with a low around 72. Southeast wind around 6 mph. Chance of precipitation is 20%.
7-day forecast for Otterville
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 72°F | Slight Chance Showers And Thunderstorms then Mostly Clear | 6 mph SE | 23% |
| Saturday | 97°F | Mostly Sunny | 5 to 9 mph SW | 7% |
| Saturday Night | 72°F | Partly Cloudy | 6 mph SW | 9% |
| Sunday | 91°F | Chance Rain Showers then Chance Showers And Thunderstorms | 3 to 8 mph NW | 35% |
| Sunday Night | 64°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 7 to 10 mph NE | 67% |
| Monday | 77°F | Showers And Thunderstorms Likely | 8 to 13 mph NE | 67% |
| Monday Night | 57°F | Showers And Thunderstorms Likely | 9 to 14 mph N | 62% |
| Tuesday | 71°F | Slight Chance Rain Showers then Mostly Cloudy | 14 mph N | 23% |
| Tuesday Night | 52°F | Mostly Cloudy | 6 to 13 mph N | 5% |
| Wednesday | 74°F | Mostly Sunny | 7 to 10 mph N | 1% |
| Wednesday Night | 54°F | Partly Cloudy | 3 to 8 mph N | 1% |
| Thursday | 75°F | Mostly Sunny | 5 to 8 mph N | 4% |
| Thursday Night | 56°F | Partly Cloudy | 3 to 7 mph NE | 3% |
| Friday | 76°F | Mostly Sunny | 5 to 8 mph NE | 6% |
Forecast source: National Weather Service (api.weather.gov) for Otterville (39.051, -90.398). Updated through the day.
Growing snapshot for Otterville
Last spring frost
Apr 5
First fall frost
Oct 27
Growing season
203 days
Hardiness zone
6b
More local growing data for Otterville: nearby ZIP 62037 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, St Charles Co Ap, Mo (6 mi from Otterville). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.