Pecatonica, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Pecatonica, a village in Winnebago County, Illinois.
This Afternoon
67°F
Rain
Rain and a slight chance of thunderstorms. Cloudy, with a high near 67. South wind 15 to 20 mph, with gusts as high as 35 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Pecatonica
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 67°F | Rain | 15 to 20 mph S | 84% |
| Tonight | 56°F | Rain | 15 mph S | 83% |
| Wednesday | 59°F | Chance Rain | 15 mph SSW | 41% |
| Wednesday Night | 45°F | Chance Rain | 15 mph SW | 30% |
| Thursday | 54°F | Rain Likely | 10 to 15 mph WSW | 57% |
| Thursday Night | 39°F | Chance Rain | 5 to 10 mph NNW | 29% |
| Friday | 50°F | Partly Sunny | 10 to 15 mph N | 14% |
| Friday Night | 31°F | Partly Cloudy | 0 to 5 mph NNW | 2% |
| Saturday | 52°F | Mostly Sunny | 0 to 5 mph WNW | 2% |
| Saturday Night | 32°F | Partly Cloudy | 0 to 5 mph WSW | 4% |
| Sunday | 58°F | Mostly Sunny then Slight Chance Rain | 5 to 10 mph W | 15% |
| Sunday Night | 32°F | Mostly Clear | 5 to 10 mph W | 4% |
| Monday | 61°F | Sunny | 5 to 15 mph SW | 1% |
| Monday Night | 37°F | Mostly Clear | 5 to 10 mph W | 0% |
Forecast source: National Weather Service (api.weather.gov) for Pecatonica (42.309, -89.357). Updated through the day.
Growing snapshot for Pecatonica
Last spring frost
Apr 26
First fall frost
Oct 13
Growing season
169 days
Hardiness zone
5b
More local growing data for Pecatonica: nearby ZIP 61063 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Cherry Valley
Durand
Loves Park
Machesney Park
New Milford
Rockford
Rockton
Roscoe
South Beloit
Westlake Village
Winnebago
Climate data from the nearest NOAA station, Freeport Waste Wtp, Il (13.5 mi from Pecatonica). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.