Garden Prairie, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Garden Prairie, a community in Boone County, Illinois.
This Afternoon
70°F
Showers And Thunderstorms Likely
Showers and thunderstorms likely. Cloudy. High near 70, with temperatures falling to around 68 in the afternoon. Southeast wind around 5 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Garden Prairie
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 70°F | Showers And Thunderstorms Likely | 5 mph SE | 72% |
| Tonight | 62°F | Showers And Thunderstorms | 0 to 5 mph NE | 100% |
| Sunday | 66°F | Showers And Thunderstorms | 10 to 15 mph NE | 81% |
| Sunday Night | 54°F | Slight Chance Rain Showers | 10 to 15 mph ENE | 19% |
| Monday | 64°F | Chance Rain Showers | 10 to 15 mph ENE | 39% |
| Monday Night | 49°F | Chance Rain Showers | 10 to 15 mph ENE | 43% |
| Tuesday | 61°F | Chance Rain Showers | 10 to 15 mph NE | 43% |
| Tuesday Night | 48°F | Mostly Cloudy | 5 to 10 mph NE | 11% |
| Wednesday | 64°F | Mostly Cloudy | 5 to 15 mph NE | 7% |
| Wednesday Night | 50°F | Mostly Cloudy | 0 to 10 mph NE | 2% |
| Thursday | 67°F | Partly Sunny | 0 to 5 mph NE | 6% |
| Thursday Night | 51°F | Mostly Cloudy | 0 to 5 mph NNE | 10% |
| Friday | 70°F | Mostly Cloudy | 0 to 5 mph NE | 9% |
| Friday Night | 51°F | Partly Cloudy | 0 to 5 mph NE | 6% |
Forecast source: National Weather Service (api.weather.gov) for Garden Prairie (42.254, -88.713). Updated through the day.
Growing snapshot for Garden Prairie
Last spring frost
Apr 28
First fall frost
Oct 12
Growing season
166 days
Hardiness zone
5b
More local growing data for Garden Prairie: nearby ZIP 61038 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Marengo, Il (6.7 mi from Garden Prairie). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.