Weather Alert
Pecatonica Weather Warning NWS WEATHER ALERT FOR THE PECATONICA, IL AREA - Issued: 903 PM CDT Fri Sep 4 2026 Pecatonica Weather Warning

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Pecatonica, IL Weather Forecast

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Pecatonica, IL Weather Forecast

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Pecatonica IL weather - Lightning Observed - 78°F
Lightning Observed
78°F
Updated 11:48 pm
Feels Like 84°F
Humidity 95%
Wind N 0 mph
Barometer  29.94 in
Dew Point 76°F
Pecatonica IL weather - Lightning Observed - 25°C
Lightning Observed
25°C
Updated 11:48 pm
Feels Like 29°C
Humidity 95%
Wind N 0 km/h
Barometer  101.3 kPa
Dew Point 25°C
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Pecatonica Weather Forecast

TONIGHT SATURDAY SATURDAY NIGHT SUNDAY SUNDAY NIGHT LABOR DAY MONDAY NIGHT TUESDAY TUESDAY NIGHT WEDNESDAY WEDNESDAY NIGHT THURSDAY
Pecatonica, IL Weather - Tonight Chance Of T-Storm Pecatonica, IL Weather - Saturday Patchy Fog Pecatonica, IL Weather - Saturday Night Partly Cloudy Pecatonica, IL Weather - Sunday Partly Cloudy Pecatonica, IL Weather - Sunday Night Partly Cloudy Pecatonica, IL Weather - Labor Day Partly Cloudy Pecatonica, IL Weather - Monday Night Partly Cloudy Pecatonica, IL Weather - Tuesday Mostly Cloudy Pecatonica, IL Weather - Tuesday Night Chance Of Showers Pecatonica, IL Weather - Wednesday Partly Cloudy Pecatonica, IL Weather - Wednesday Night Clearing Pecatonica, IL Weather - Thursday Partly Cloudy
Chance of T-Storm Patchy Fog Partly Cloudy Partly Cloudy Partly Cloudy Partly Cloudy Partly Cloudy Mostly Cloudy Chance of Showers Partly Cloudy Clearing Partly Cloudy
Lo: 71°FLo: 22°C Hi: 85°FHi: 29°C
 Lo: 61°FLo: 16°C Hi: 81°FHi: 27°C
 Lo: 59°FLo: 15°C Hi: 81°FHi: 27°C
 Lo: 61°FLo: 16°C Hi: 89°FHi: 32°C
 Lo: 70°FLo: 21°C Hi: 89°FHi: 32°C
 Lo: 61°FLo: 16°C Hi: 80°FHi: 27°C
POP: 60% POP: 50%
POP = Probability of Precipitation.
Weather Outlook Updated: 856 PM CDT Fri Sep 04 2026 Pecatonica, IL Weather - WeatherWorld.com

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Issued: 835 PM CDT Fri Sep 4 2026

Key Messages

  • Chance of scattered showers and thunderstorms tonight.
  • Gradually turning cooler and less humid this weekend, though remaining seasonably warm.
  • Moderate to high swim risk expected late Saturday into early Sunday during the final weekend of beach season.

Discussion

... Issued at 314 PM CDT Fri Sep 4 2026

Breezy east-northeasterly winds this morning in the wake of the outflow boundary have significantly impacted the ability to heat up through early afternoon. This has particularly been tru...