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Main Lake, IL Weather Forecast

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Clear

51°F

Updated	8:09 am
Feels Like	56°F
Humidity	95%
Wind	N 0 mph
Barometer	30.15 in
Dew Point	50°F

Clear

11°C

Updated	8:09 am
Feels Like	14°C
Humidity	95%
Wind	N 0 km/h
Barometer	102 kPa
Dew Point	10°C

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Cloud Cover	0%
uv UV Index	5
Sunrise	6:57 AM
Sunset	6:25 PM
Moonrise	5:54 AM
Moonset	5:44 PM

Civil Twilight
6:28 AM to 6:54 AM
6:24 PM to 6:51 PM
Main Lake IL Weather - Waning Crescent Moon

Waning Crescent Moon

Main Lake Weather Forecast

TODAY	TONIGHT	SATURDAY	SATURDAY NIGHT	SUNDAY	SUNDAY NIGHT	COLUMBUS DAY	MONDAY NIGHT	TUESDAY	WEDNESDAY	WEDNESDAY NIGHT	THURSDAY

Sunny	Partly Cloudy	Showers	Showers	Mostly Cloudy	Mostly Clear	Mostly Clear	Mostly Clear	Mostly Clear	Partly Cloudy	Partly Cloudy	Chance of Showers
Hi: 89°FHi: 32°C	Lo: 59°FLo: 15°C	Hi: 75°FHi: 24°C	Lo: 59°FLo: 15°C	Hi: 75°FHi: 24°C	Hi: 89°FHi: 32°C Lo: 55°FLo: 13°C	Hi: 89°FHi: 32°C Lo: 55°FLo: 13°C	Hi: 89°FHi: 32°C Lo: 61°FLo: 16°C	Hi: 89°FHi: 32°C Lo: 61°FLo: 16°C	Hi: 81°FHi: 27°C Lo: 61°FLo: 16°C	Hi: 81°FHi: 27°C Lo: 61°FLo: 16°C	Hi: 81°FHi: 27°C
		POP: 70%	POP: 90%								POP: 30%

POP = Probability of Precipitation.

Weather Outlook Updated: 607 AM CDT Fri Oct 09 2026 Main Lake, IL Weather - WeatherWorld.com

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Meteorlogic Glosserator
Instant definitions for any meteorological term.

Issued: 630 AM CDT Fri Oct 9 2026

Key Messages

Well above normal temperatures can again be expected today with highs mostly in the upper 80s.
As the remnants of Isaias move north through Alabama, then east of the PAH forecast area over the weekend, 50-100% chances of showers and some thunderstorms can be expected by Saturday afternoon into Saturday night, ending west to east late Saturday night into Sunday morning.
Current forecast rainfall totals range from a quarter inch to one and one quarter inches, with the highest totals ac...

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Weather 101: Term of the Day

Cap

(also called "Lid") A layer of relatively warm air aloft, usually several thousand feet above the ground, which suppresses or delays the development of thunderstorms. Air parcels rising into this layer become cooler than the surrounding air, which inhibits their ability to rise further and produce thunderstorms. As such, the cap often prevents or delays thunderstorm development even in the presence of extreme instability. However, if the cap is removed or weakened, then explosive thunderstorm development can occur. The cap is an important ingredient in most severe thunderstorm episodes, as it serves to separate warm, moist air below and cooler, drier air above. With the cap in place, air below it can continue to warm and/or moisten, thus increasing the amount of potential instability. Or, air above it can cool, which also increases potential instability. But without a cap, either process (warming/moistening at low levels or cooling aloft) results in a faster release of available instability - often before instability levels become large enough to support severe weather development.