Pecatonica, IL Weather & Growing Conditions
Today
59°F
Patchy Drizzle
Patchy drizzle and isolated rain showers. Mostly cloudy. High near 59, with temperatures falling to around 53 in the afternoon. Southwest wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 59°F | Patchy Drizzle | 15 mph SW | 17% |
| Tonight | 45°F | Patchy Drizzle | 15 mph SW | 29% |
| Thursday | 55°F | Chance Rain Showers | 10 to 15 mph W | 35% |
| Thursday Night | 38°F | Slight Chance Rain Showers then Mostly Cloudy | 10 to 15 mph NNW | 20% |
| Friday | 48°F | Partly Sunny | 10 to 15 mph N | 4% |
| Friday Night | 29°F | Partly Cloudy | 0 to 10 mph NNW | 0% |
| Saturday | 51°F | Sunny | 0 to 5 mph NW | 0% |
| Saturday Night | 31°F | Mostly Clear | 5 mph W | 1% |
| Sunday | 56°F | Sunny | 5 to 10 mph W | 5% |
| Sunday Night | 32°F | Mostly Clear | 5 mph WSW | 0% |
| Monday | 60°F | Sunny | 5 to 10 mph SW | 0% |
| Monday Night | 38°F | Mostly Clear | 5 to 10 mph W | 0% |
| Tuesday | 61°F | Sunny | 5 mph WNW | 0% |
| Tuesday Night | 36°F | Partly Cloudy | 0 to 5 mph NNW | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Pecatonica, IL
Last spring frost
Apr 24
First fall frost
Oct 17
Growing season
174 days
Hardiness zone
5b
Explore more for Pecatonica, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Rockford Gtr Rockford Ap, Il (13.4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.