Weather Alert
Cast Weather Warning NWS WEATHER ALERT FOR THE CAST, IL AREA - HARD FROST ADVISORY Issued: 841 AM CDT Sat Oct 17 2026 Cast Weather Warning

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Cast, IL Weather Forecast

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Cast, IL Weather Forecast

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Cast IL weather - Clear - 48°F
Clear
48°F
Updated 10:37 am
Feels Like 45°F
Humidity 52%
Wind NE 8 mph
Barometer  30.56 in
Dew Point 31°F
Cast IL weather - Clear - 9°C
Clear
9°C
Updated 10:37 am
Feels Like 7°C
Humidity 52%
Wind NE 13 km/h
Barometer  103.5 kPa
Dew Point -0°C
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Cast Weather Forecast

REST OF TODAY TONIGHT SUNDAY SUNDAY NIGHT MONDAY MONDAY NIGHT TUESDAY WEDNESDAY THURSDAY THURSDAY NIGHT FRIDAY
Cast, IL Weather - Rest Of Today Sunny Cast, IL Weather - Tonight Clear Cast, IL Weather - Sunday Sunny Cast, IL Weather - Sunday Night Clear Cast, IL Weather - Monday Sunny Cast, IL Weather - Monday Night Mostly Clear Cast, IL Weather - Tuesday Mostly Clear Cast, IL Weather - Wednesday Mostly Clear Cast, IL Weather - Thursday Mostly Clear Cast, IL Weather - Thursday Night Mostly Clear Cast, IL Weather - Friday Mostly Clear
Sunny Clear Sunny Clear Sunny Mostly Clear Mostly Clear Mostly Clear Mostly Clear Mostly Clear Mostly Clear
Hi: 59°FHi: 15°C
 Lo: 35°FLo: 2°C Hi: 65°FHi: 18°C
 Lo: 35°FLo: 2°C Hi: 71°FHi: 22°C
 Hi: 79°FHi: 26°C
Lo: 41°FLo: 5°C		 Hi: 79°FHi: 26°C
Lo: 41°FLo: 5°C		 Hi: 79°FHi: 26°C
Lo: 41°FLo: 5°C		 Hi: 79°FHi: 26°C
Lo: 41°FLo: 5°C		 Hi: 80°FHi: 27°C
Lo: 49°FLo: 9°C		 Hi: 80°FHi: 27°C
Lo: 49°FLo: 9°C
POP = Probability of Precipitation.
Weather Outlook Updated: 847 AM CDT Sat Oct 17 2026 Cast, IL Weather - WeatherWorld.com

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Meteorlogic Glosserator
Instant definitions for any meteorological term.

Issued: 552 AM CDT Sat Oct 17 2026

Key Messages

  • A Frost Advisory is in effect this morning along and west of a Lacon...to Lincoln...to Taylorville line.
  • Frost will be likely across areas generally east of I-55 tonight. Sensitive outdoor plants need to be protected this weekend in order to avoid damage.

Discussion

... Issued at 143 AM CDT Sat Oct 17 2026

The large eastern US trough is approaching the eastern seaboard this morning with NNW flow aloft in its wake. At the surface, high pressure is centered over the central and southern H...