Mastodon Lake, IL Weather Forecast & Current Conditions

Feedback E-mail the Weather

Quick Clicks

Weather World

Mastodon Lake, IL Weather Maps

°F °C°F °C
Mastodon Lake Weather Map
UTC Time: 9/29/2026, 09:45
Your Time:
Aeronautical Observation: Automated synoptic observations via NWS Gateway.
Auto-refresh in: 5:02

Mastodon Lake, IL Regional Weather

Expires:202609291000;;238601
ASUS43 KLOT 290912
RWRIL 

ILLINOIS REGIONAL WEATHER ROUNDUP
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
400 AM CDT TUE SEP 29 2026

NOTE: "FAIR" INDICATES FEW OR NO CLOUDS BELOW 12,000 FEET WITH NO
SIGNIFICANT WEATHER AND/OR OBSTRUCTIONS TO VISIBILITY.

* THESE STATIONS ARE NOT UNDER NWS QUALITY CONTROL. THEY ALSO MAY NOT
  REPORT WEATHER SUCH AS PRECIPITATION OR FOG.


ILZ005-006-012>014-019>023-291000-
NORTHEAST ILLINOIS
  
CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
CHICAGO-OHARE  CLEAR     55  53  93 CALM      30.03S TC  13           
CHICAGO-MIDWAY CLEAR     57  55  93 W3        30.04S TC  14           
AURORA         PTCLDY    47  47 100 CALM      30.05R FOG     TC   8   
JOLIET*        FOG       50  50 100 CALM      30.05S VSB 1   TC  10   
WAUKEGAN       FOG       52  52 100 CALM      30.04S VSB 1/2 TC  11   
DUPAGE AIRPORT CLEAR     50  49  96 CALM      30.05S TC  10           
KANKAKEE*      FOG       48  47  95 CALM      30.05S VSB<1/4 TC   9   
WHEELING       MOCLDY    53  53 100 NW3       30.06S FOG     TC  12   
ROMEOVILLE*    PTCLDY    54  54 100 CALM      30.06R FOG     TC  12   
LANSING*       CLOUDY    48  48 100 CALM      30.04S FOG     TC   9   
NORTHERLY ISL*   N/A     60  57  89 SE2         N/A  TC  16           
$$


SKY/WX - Weather  TMP - Temperature  DP - Dew Point  RH - Humidity
WIND - Wind Direction/Speed PRES - Barometric Pressure VSB - Visibility
WCI - Wind Chill Index E13G22 Wind - East Wind 13 mph/Gusts of 22 mph

Mastodon Lake, IL

Tonight
Cloudy
50°10°
0%
Tuesday
Cloudy
75°/ 62° 24°/ 17°
40%
Wednesday
Rain Showers
72°/ 65° 22°/ 18°
80%
Thursday
Thunderstorms
72°/ 55° 22°/ 13°
90%
Friday
Rain Showers
65°/ 48° 18°/ 9°
50%
Saturday
Cloudy
65°/ 48° 18°/ 9°
0%
Sunday
Cloudy
65°/ 45° 18°/ 7°
0%
Monday
Sunny
62°17°
0%

Night: Partly cloudy. Areas of fog. Lows around 50. Light and variable winds.

Oswego, IL

Tonight
Cloudy
50°10°
0%
Tuesday
Cloudy
78°/ 62° 26°/ 17°
40%
Wednesday
Rain Showers
75°/ 68° 24°/ 20°
70%
Thursday
Thunderstorms
75°/ 58° 24°/ 14°
90%
Friday
Rain Showers
65°/ 50° 18°/ 10°
50%
Saturday
Cloudy
65°/ 50° 18°/ 10°
0%
Sunday
Cloudy
68°/ 45° 20°/ 7°
0%
Monday
Sunny
65°18°
0%

Night: Partly cloudy. Areas of fog. Lows around 50. Light and variable winds.

Joliet, IL

Tonight
Cloudy
52°11°
0%
Tuesday
Cloudy
78°/ 62° 26°/ 17°
30%
Wednesday
Rain Showers
72°/ 68° 22°/ 20°
70%
Thursday
Thunderstorms
75°/ 60° 24°/ 16°
90%
Friday
Rain Showers
65°/ 52° 18°/ 11°
50%
Saturday
Cloudy
65°/ 52° 18°/ 11°
0%
Sunday
Cloudy
65°/ 48° 18°/ 9°
0%
Monday
Sunny
62°17°
0%

Night: Partly cloudy. Areas of fog. Near steady temperature in the lower 50s. Light and variable winds.

Naperville, IL

Tonight
Cloudy
55°13°
0%
Tuesday
Cloudy
75°/ 62° 24°/ 17°
40%
Wednesday
Rain Showers
72°/ 68° 22°/ 20°
70%
Thursday
Thunderstorms
72°/ 58° 22°/ 14°
90%
Friday
Rain Showers
65°/ 52° 18°/ 11°
50%
Saturday
Cloudy
65°/ 50° 18°/ 10°
0%
Sunday
Cloudy
65°/ 48° 18°/ 9°
0%
Monday
Sunny
62°17°
0%

Night: Partly cloudy. Patchy fog after midnight, then areas of fog late. Near steady temperature in the mid 50s. Light and variable winds.

Calumet City, IL

Tonight
Cloudy
52°11°
0%
Tuesday
Cloudy
78°/ 62° 26°/ 17°
20%
Wednesday
Rain Showers
72°/ 68° 22°/ 20°
50%
Thursday
Thunderstorms
75°/ 60° 24°/ 16°
90%
Friday
Rain Showers
65°/ 52° 18°/ 11°
50%
Saturday
Mostly Cloudy
65°/ 52° 18°/ 11°
0%
Sunday
Cloudy
65°/ 48° 18°/ 9°
0%
Monday
Sunny
62°17°
0%

Night: Partly cloudy. Areas of fog. Near steady temperature in the lower 50s. Light and variable winds.

DeKalb, IL

Tonight
Cloudy
48°9°
0%
Tuesday
Mostly Cloudy
75°/ 62° 24°/ 17°
50%
Wednesday
Rain Showers
72°/ 65° 22°/ 18°
80%
Thursday
Thunderstorms
72°/ 55° 22°/ 13°
90%
Friday
Rain Showers
65°/ 48° 18°/ 9°
50%
Saturday
Cloudy
65°/ 48° 18°/ 9°
0%
Sunday
Cloudy
65°/ 45° 18°/ 7°
0%
Monday
Sunny
62°17°
0%

Night: Partly cloudy. Patchy fog after midnight, then areas of fog late. Lows in the upper 40s. Southeast winds around 5 mph.

Morris, IL

Tonight
Clear
52°11°
0%
Tuesday
Cloudy
78°/ 65° 26°/ 18°
30%
Wednesday
Rain Showers
78°/ 68° 26°/ 20°
50%
Thursday
Thunderstorms
78°/ 60° 26°/ 16°
90%
Friday
Rain Showers
68°/ 52° 20°/ 11°
50%
Saturday
Cloudy
68°/ 52° 20°/ 11°
0%
Sunday
Cloudy
68°/ 45° 20°/ 7°
0%
Monday
Sunny
65°18°
0%

Night: Mostly clear. Patchy fog after midnight, then areas of fog late. Near steady temperature in the lower 50s. Light and variable winds.

Evanston, IL

Tonight
Mostly Cloudy
55°13°
0%
Tuesday
Mostly Cloudy
75°/ 62° 24°/ 17°
40%
Wednesday
Rain Showers
72°/ 65° 22°/ 18°
70%
Thursday
Thunderstorms
72°/ 58° 22°/ 14°
90%
Friday
Rain Showers
65°/ 52° 18°/ 11°
40%
Saturday
Cloudy
62°/ 52° 17°/ 11°
0%
Sunday
Cloudy
65°/ 48° 18°/ 9°
0%
Monday
Sunny
62°17°
0%

Night: Mostly cloudy. Patchy fog after midnight, then areas of fog late. Near steady temperature in the mid 50s. Light and variable winds.

Chicago, IL

Tonight
Cloudy
55°13°
0%
Tuesday
Cloudy
75°/ 62° 24°/ 17°
20%
Wednesday
Rain Showers
72°/ 68° 22°/ 20°
70%
Thursday
Thunderstorms
75°/ 60° 24°/ 16°
90%
Friday
Rain Showers
62°/ 52° 17°/ 11°
50%
Saturday
Cloudy
62°/ 52° 17°/ 11°
0%
Sunday
Cloudy
65°/ 50° 18°/ 10°
0%
Monday
Sunny
62°17°
0%

Night: Partly cloudy. Patchy fog after midnight, then areas of fog late. Near steady temperature in the mid 50s. Light and variable winds.

Channahon, IL

Tonight
Clear
52°11°
0%
Tuesday
Cloudy
78°/ 62° 26°/ 17°
20%
Wednesday
Rain Showers
75°/ 68° 24°/ 20°
50%
Thursday
Thunderstorms
78°/ 60° 26°/ 16°
90%
Friday
Rain Showers
68°/ 52° 20°/ 11°
50%
Saturday
Cloudy
65°/ 50° 18°/ 10°
0%
Sunday
Cloudy
68°/ 45° 20°/ 7°
0%
Monday
Sunny
65°18°
0%

Night: Mostly clear. Areas of fog. Near steady temperature in the lower 50s. Light and variable winds.

Ottawa, IL

Tonight
Clear
50°10°
0%
Tuesday
Cloudy
78°/ 65° 26°/ 18°
40%
Wednesday
Rain Showers
75°/ 68° 24°/ 20°
70%
Thursday
Thunderstorms
75°/ 58° 24°/ 14°
90%
Friday
Rain Showers
68°/ 50° 20°/ 10°
50%
Saturday
Cloudy
68°/ 50° 20°/ 10°
0%
Sunday
Cloudy
68°/ 45° 20°/ 7°
0%
Monday
Sunny
65°18°
0%

Night: Mostly clear. Patchy fog. Lows around 50. Southeast winds around 5 mph.

Crete, IL

Tonight
Cloudy
50°10°
0%
Tuesday
Cloudy
78°/ 62° 26°/ 17°
20%
Wednesday
Rain Showers
75°/ 68° 24°/ 20°
50%
Thursday
Rain Showers
78°/ 60° 26°/ 16°
90%
Friday
Rain Showers
65°/ 50° 18°/ 10°
50%
Saturday
Cloudy
65°/ 50° 18°/ 10°
0%
Sunday
Cloudy
65°/ 45° 18°/ 7°
0%
Monday
Sunny
62°17°
0%

Night: Partly cloudy. Areas of fog. Near steady temperature around 50. Light and variable winds.

Crystal Lake, IL

Tonight
Cloudy
50°10°
0%
Tuesday
Mostly Cloudy
75°/ 62° 24°/ 17°
50%
Wednesday
Rain Showers
68°/ 65° 20°/ 18°
90%
Thursday
Thunderstorms
70°/ 55° 21°/ 13°
90%
Friday
Rain Showers
65°/ 48° 18°/ 9°
40%
Saturday
Cloudy
65°/ 48° 18°/ 9°
0%
Sunday
Cloudy
65°/ 42° 18°/ 6°
0%
Monday
Sunny
62°17°
0%

Night: Partly cloudy. Areas of fog. Near steady temperature around 50. Light and variable winds.

Waukegan, IL

Tonight
Mostly Cloudy
52°11°
0%
Tuesday
Mostly Cloudy
75°/ 62° 24°/ 17°
40%
Wednesday
Rain Showers
68°/ 65° 20°/ 18°
80%
Thursday
Thunderstorms
72°/ 55° 22°/ 13°
90%
Friday
Rain Showers
62°/ 48° 17°/ 9°
40%
Saturday
Cloudy
62°/ 48° 17°/ 9°
0%
Sunday
Cloudy
65°/ 45° 18°/ 7°
0%
Monday
Sunny
62°17°
0%

Night: Mostly cloudy. Areas of fog. Near steady temperature in the lower 50s. Light and variable winds.

Dixon, IL

Tonight
Clear
50°10°
0%
Tuesday
Mostly Cloudy
75°/ 62° 24°/ 17°
50%
Wednesday
Rain Showers
72°/ 65° 22°/ 18°
80%
Thursday
Thunderstorms
72°/ 55° 22°/ 13°
90%
Friday
Rain Showers
65°/ 48° 18°/ 9°
40%
Saturday
Cloudy
65°/ 48° 18°/ 9°
0%
Sunday
Cloudy
65°/ 45° 18°/ 7°
0%
Monday
Sunny
62°17°
0%

Night: Mostly clear. Patchy fog late. Lows around 50. Southeast winds around 5 mph.

Rochelle, IL

Tonight
Clear
48°9°
0%
Tuesday
Mostly Cloudy
75°/ 62° 24°/ 17°
50%
Wednesday
Rain Showers
70°/ 65° 21°/ 18°
90%
Thursday
Thunderstorms
72°/ 55° 22°/ 13°
90%
Friday
Rain Showers
65°/ 45° 18°/ 7°
40%
Saturday
Cloudy
65°/ 48° 18°/ 9°
0%
Sunday
Cloudy
65°/ 42° 18°/ 6°
0%
Monday
Sunny
62°17°
0%

Night: Mostly clear. Patchy fog late. Lows in the upper 40s. Southeast winds around 5 mph.

Belvidere, IL

Tonight
Cloudy
52°11°
0%
Tuesday
Mostly Cloudy
75°/ 62° 24°/ 17°
50%
Wednesday
Rain Showers
68°/ 65° 20°/ 18°
90%
Thursday
Thunderstorms
70°/ 52° 21°/ 11°
90%
Friday
Rain Showers
65°/ 45° 18°/ 7°
40%
Saturday
Cloudy
65°/ 48° 18°/ 9°
0%
Sunday
Cloudy
65°/ 42° 18°/ 6°
0%
Monday
Sunny
62°17°
0%

Night: Partly cloudy. Patchy fog after midnight, then areas of fog late. Near steady temperature in the lower 50s. Light and variable winds.

Kankakee, IL

Tonight
Clear
50°10°
0%
Tuesday
Cloudy
78°/ 62° 26°/ 17°
20%
Wednesday
Rain Showers
78°/ 68° 26°/ 20°
40%
Thursday
Rain Showers
80°/ 60° 27°/ 16°
90%
Friday
Rain Showers
65°/ 50° 18°/ 10°
60%
Saturday
Cloudy
65°/ 50° 18°/ 10°
0%
Sunday
Cloudy
68°/ 45° 20°/ 7°
0%
Monday
Sunny
65°18°
0%

Night: Mostly clear. Areas of fog. Near steady temperature around 50. Light and variable winds.

Gary, IN

Tonight
Cloudy
50°10°
0%
Tuesday
Cloudy
78°/ 62° 26°/ 17°
0%
Wednesday
Rain Showers
75°/ 68° 24°/ 20°
50%
Thursday
Rain Showers
78°/ 58° 26°/ 14°
90%
Friday
Rain Showers
65°/ 48° 18°/ 9°
50%
Saturday
Mostly Cloudy
65°/ 50° 18°/ 10°
0%
Sunday
Cloudy
65°/ 45° 18°/ 7°
0%
Monday
Sunny
62°17°
0%

Night: Partly cloudy. Areas of fog. Near steady temperature around 50. Light and variable winds.

Pontiac, IL

Tonight
Clear
52°11°
0%
Tuesday
Cloudy
80°/ 62° 27°/ 17°
20%
Wednesday
Rain Showers
78°/ 68° 26°/ 20°
50%
Thursday
Rain Showers
80°/ 62° 27°/ 17°
90%
Friday
Rain Showers
68°/ 52° 20°/ 11°
60%
Saturday
Cloudy
68°/ 52° 20°/ 11°
0%
Sunday
Cloudy
68°/ 45° 20°/ 7°
0%
Monday
Sunny
65°18°
0%

Night: Clear. Patchy fog late. Near steady temperature in the lower 50s. Southeast winds around 5 mph.

Names listed above may include county names.

Trending Headlines

Trending Entertainment Headlines

Mastodon Lake Radar Loop

Use the map search tool if you want to place a location marker on the radar map...

Mastodon Lake Quick Facts

National Two Day Weather Forecast


E-mail the Mastodon Lake Weather Forecast

Voice your opinion or tell us about page issues...