Plymouth, IL Weather Forecast

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Plymouth, IL Weather Forecast

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Plymouth IL weather  - Hazy - 89°F
Hazy
89°F
Updated 4:31 pm
Feels Like 90°F
Humidity 43%
Wind S 14 mph
Barometer  29.8 in
Dew Point 64°F
Plymouth IL weather  - Hazy - 32°C
Hazy
32°C
Updated 4:31 pm
Feels Like 32°C
Humidity 43%
Wind S 23 km/h
Barometer  100.9 kPa
Dew Point 18°C

Plymouth Weather Forecast

THIS AFTERNOON TONIGHT TUESDAY TUESDAY NIGHT WEDNESDAY WEDNESDAY NIGHT THURSDAY THURSDAY NIGHT FRIDAY FRIDAY NIGHT SATURDAY SUNDAY
Plymouth, IL Weather - This Afternoon Mostly Sunny Plymouth, IL Weather - Tonight Mostly Clear Plymouth, IL Weather - Tuesday Sunny Plymouth, IL Weather - Tuesday Night Chance Of T-Storm Plymouth, IL Weather - Wednesday Showers Plymouth, IL Weather - Wednesday Night Showers Plymouth, IL Weather - Thursday Chance Of T-Storm Plymouth, IL Weather - Thursday Night Mostly Cloudy Plymouth, IL Weather - Friday Mostly Sunny Plymouth, IL Weather - Friday Night Mostly Clear Plymouth, IL Weather - Saturday Mostly Clear Plymouth, IL Weather - Sunday Sunny
Mostly Sunny Mostly Clear Sunny Chance of T-Storm Showers Showers Chance of T-Storm Mostly Cloudy Mostly Sunny Mostly Clear Mostly Clear Sunny
Hi: 89°FHi: 32°C
Lo: 70°FLo: 21°C Hi: 85°FHi: 29°C
Lo: 65°FLo: 18°C Hi: 75°FHi: 24°C
Lo: 59°FLo: 15°C Hi: 71°FHi: 22°C
Lo: 49°FLo: 9°C Hi: 60°FHi: 16°C
Hi: 61°FHi: 16°C
Lo: 40°FLo: 4°C
Hi: 61°FHi: 16°C
Lo: 40°FLo: 4°C
Hi: 69°FHi: 21°C
POP: 70% POP: 70% POP: 60% POP: 100%
POP = Probability of Precipitation.
Weather Outlook Updated: 126 PM CDT Mon Oct 12 2026 Plymouth, IL Weather - WeatherWorld.com

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Issued: 155 PM CDT Mon Oct 12 2026

Key Messages

  • Continued unseasonably warm through Tuesday. Refer to the climate section for specific numbers.
  • There is a Marginal (level 1 of 5) risk for isolated severe storms Tuesday night, with the main hazards heavy downpours and large hail.
  • A strong cold front to sweep through Friday will bring much cooler temps for the weekend and the risk for frost, especially Friday night.
  • Above normal temps return Sunday and Monday.

Aviation

/18Z TAFS THROUGH 18Z TUESDAY/... Issued at 1241 PM CDT Mon Oct 12...