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St. Simeon School, IL Weather Forecast

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Mostly Cloudy

67°F

Updated	11:23 am
Feels Like	64°F
Humidity	70%
Wind	N 8 mph
Barometer	30.11 in
Dew Point	57°F

Mostly Cloudy

19°C

Updated	11:23 am
Feels Like	18°C
Humidity	70%
Wind	N 13 km/h
Barometer	102 kPa
Dew Point	14°C

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Cloud Cover	5%
uv UV Index	5
Sunrise	6:45 AM
Sunset	6:38 PM
Moonrise	7:21 PM
Moonset	9:03 AM

Civil Twilight
6:15 AM to 6:42 AM
6:38 PM to 7:06 PM
St. Simeon School IL Weather - Waning Gibbous Moon

Waning Gibbous Moon

St. Simeon School Weather Forecast

REST OF TODAY	TONIGHT	TUESDAY	TUESDAY NIGHT	WEDNESDAY	WEDNESDAY NIGHT	THURSDAY	THURSDAY NIGHT	FRIDAY	FRIDAY NIGHT	SATURDAY	SATURDAY NIGHT

Clearing	Patchy Fog	Patchy Fog	Mostly Cloudy	Chance of Showers	Chance of Showers	Chance of T-Storm	Chance of Showers	Mostly Cloudy	Partly Cloudy	Partly Cloudy	Partly Cloudy
Hi: 71°FHi: 22°C	Lo: 55°FLo: 13°C	Hi: 75°FHi: 24°C	Lo: 61°FLo: 16°C	Hi: 79°FHi: 26°C	Lo: 69°FLo: 21°C	Hi: 71°FHi: 22°C	Lo: 59°FLo: 15°C	Hi: 65°FHi: 18°C	Lo: 55°FLo: 13°C	Hi: 65°FHi: 18°C	Lo: 55°FLo: 13°C
				POP: 20%	POP: 50%	POP: 90%	POP: 50%

POP = Probability of Precipitation.

Weather Outlook Updated: 906 AM CDT Mon Sep 28 2026 St. Simeon School, IL Weather - WeatherWorld.com

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Meteorlogic Glosserator
Instant definitions for any meteorological term.

Issued: 636 AM CDT Mon Sep 28 2026

Key Messages

Fog, including areas of dense fog, will persist through mid- morning across portions of northern Illinois and northwestern Indiana. The greatest coverage of dense fog is expected to remain near/south of I-80 and near/east of I-55.
Widespread rain is likely across the region in the late Wednesday through Thursday time frame.

Discussion

... Issued at 337 AM CDT Mon Sep 28 2026

Calm winds and mostly clear skies have allowed for fog to develop in portions of northern Illinois and northwest ...

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Weather 101: Term of the Day

Tides

The periodic (occurring at regular intervals) variations in the surface water level of the oceans, bays, gulfs, and inlets. Tides are the result of the gravitiational attraction of the sun and the moon on the earth. The attraction of the moon is far greater than the attraction of the sun due to the close proximity of the earth and the moon. The sun is 360 times further from the earth than the moon. Therefore, the moon plays a larger role than the sun in producing tides. Every 27.3 days, the earth and the moon revolve around a common point. This means that the oceans and other water bodies which are affected by the earth-moon system experience a new tidal cycle every 27.3 days. Because of the physical processes which occur to produce the tidal system, there are two high tides and two low tides each day. Because of the angle of the moon with respect to the earth, the two high tides each day do not have to be of equal height. The same holds true for the two low tides each day. Tides also differ in height on a daily basis. The daily differences between tidal heights is due to the changing distance between the earth and the moon. Scientists use measurements of the height of the water level to examine tides and the various phenomena which influence tides, such as hurricanes and winter storms.