Weather Saint Marys Lake Dam week

Weather forecast for Saint Marys Lake Dam for this and next week.

Tuesday, Jan 13

46 / 32°F

0.00 in

17 mph

32 °F	27 °F	12 am
37 °F	32 °F	6 am
46 °F	39 °F	12 pm
43 °F	37 °F	6 pm

sunrise 7:18 am
sunset 4:42 pm

HOURLY

During the day morning overcast, later morning light sleet, in the afternoon clear, in the evening initially clear, later overcast. The highest temperature 46 °F. Total rainfall 0.02 in. At night light sleet. The lowest temperature 32 °F. Total rainfall 0.04 in.

Interactive map weather Illinois, USA

GPS: 42.2831; -87.9804

altitude: 741 ft
local time:

PLACES IN THE AREA

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Weather forecast Saint Marys Lake Dam, Illinois, USA extended forecast

Time			Precip.	Wind	Pressure	Humidity	Dew	total	Fog	Low	Middle	High
Tuesday 01/13/2026
12 AM 1 AM	overcast	32 °F 27 °F	0.0 in	16 fps 11 mph southwest	29.9 in	82 %	28 °F	0 %	0%	0%	0%	0%
6 AM 7 AM	light sleet	37 °F 32 °F	0.02 in	23 fps 16 mph southwest	29.7 in	75 %	32 °F	100 %	0%	0%	100%	100%
12 PM 1 PM	clear	46 °F 41 °F	0.0 in	25 fps 17 mph west-southwest	29.6 in	64 %	34 °F	1 %	0%	1%	0%	0%
6 PM 7 PM	overcast	43 °F 37 °F	0.0 in	18 fps 12 mph west-southwest	29.6 in	73 %	34 °F	96 %	0%	1%	96%	16%
Wednesday 01/14/2026
12 AM 1 AM	overcast	39 °F 34 °F	0.00 in	15 fps 10 mph west	29.6 in	81 %	32 °F	100 %	0%	100%	20%	0%
6 AM 7 AM	light sleet	36 °F 30 °F	0.04 in	15 fps 10 mph west-northwest	29.7 in	87 %	32 °F	100 %	0%	100%	100%	0%
12 PM 1 PM	overcast	28 °F 21 °F	0.00 in	25 fps 17 mph north	29.9 in	72 %	23 °F	100 %	0%	100%	97%	0%
6 PM 7 PM	overcast	23 °F 16 °F	0.0 in	19 fps 13 mph north	30.1 in	61 %	12 °F	97 %	0%	97%	0%	0%

Saint Marys Lake Dam, Illinois, USA - information

State: Illinois, USA

GPS coordinates: 42.2831; -87.9804

Time zone: America / Chicago time difference in hours with time in NY is -7 hours

Altitude: 741 ft
The administrative part:

Illinois, Springfield
Lake County, Waukegan

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Weather Saint Marys Lake Dam, Illinois, USA. Weather forecast Saint Marys Lake Dam.

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Data source

Weather forecast for Saint Marys Lake Dam is supplied by MET Norway Norwegian Meteorological Institute and the NRK.

Feels like

To calculate the perceived temperature, we use the Australian Apparent Temperature (AAT) model, which is designed for year-round calculations and takes air humidity into account in addition to temperature and wind speed.

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Astronomical information Saint Marys Lake Dam

data are always in the local time

Sun and light

Jan. 13, 2026

Sunrise:	Sunset:
7:18 am	4:42 pm
Noon:	Length of day:
noon	09:24
Start of civil twilight*:	End of civil twilight*:
6:47 am	5:14 pm
Start of nautical twilight*:	End of nautical twilight*:
6:13 am	5:48 pm
Start of astronomical twilight*:	End of astronomical twilight*:
5:39 am	6:22 pm
* What is Twilight?

Moon and moon phases

Moonrise:	Moonset:
01/13/2026 3:09 am	01/13/2026 12:16 pm
Next new moon:	Next full moon:
01/18/2026	02/01/2026