Pecatonica, IL Weather & Growing Conditions
Overnight
61°F
Mostly Clear
Mostly clear, with a low around 61. South southwest wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 61°F | Mostly Clear | 5 mph SSW | 0% |
| Tuesday | 84°F | Mostly Sunny | 5 to 10 mph SSW | 13% |
| Tuesday Night | 64°F | Chance Showers And Thunderstorms | 0 to 5 mph W | 74% |
| Wednesday | 76°F | Showers And Thunderstorms Likely | 0 to 5 mph WSW | 74% |
| Wednesday Night | 58°F | Showers And Thunderstorms Likely | 0 to 5 mph NW | 64% |
| Thursday | 78°F | Chance Rain Showers then Mostly Sunny | 0 to 5 mph NE | 30% |
| Thursday Night | 57°F | Mostly Clear | 0 mph | 8% |
| Friday | 81°F | Mostly Sunny | 0 to 5 mph SSE | 5% |
| Friday Night | 61°F | Mostly Clear | 0 to 5 mph SSW | 6% |
| Saturday | 83°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 5 to 10 mph SSW | 15% |
| Saturday Night | 67°F | Slight Chance Showers And Thunderstorms | 5 to 10 mph SSW | 22% |
| Sunday | 85°F | Slight Chance Showers And Thunderstorms | 5 to 15 mph SW | 22% |
| Sunday Night | 67°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 5 to 10 mph SSW | 42% |
| Monday | 84°F | Chance Showers And Thunderstorms | 5 to 10 mph SSW | 40% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Pecatonica, IL
Last spring frost
Apr 26
First fall frost
Oct 13
Growing season
169 days
Hardiness zone
5b
Explore more for Pecatonica, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Freeport Waste Wtp, Il (13.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.