St. John, IN Weather Forecast & Current Conditions

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Saint John Weather Map
UTC Time: 9/16/2026, 03:25
Your Time:
Aeronautical Observation: Automated synoptic observations via NWS Gateway.
Auto-refresh in: 5:02

St. John, IN Regional Weather

Expires:202609160400;;523337
ASUS43 KIND 160310
RWRIN 

WEATHER ROUNDUP FOR INDIANA
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
1100 PM EDT TUE SEP 15 2026

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

* - STATION DOES NOT REPORT WEATHER SUCH AS PRECIPITATION OR FOG.

+ - STATION NOT QUALITY CONTROLLED BY THE NATIONAL WEATHER SERVICE.
    USE DATA WITH CAUTION...ESPECIALLY DEWPOINT AND RELATIVE
    HUMIDITY OBSERVATIONS.


INZ001>003-010>013-019-020-160400-
NORTHWEST INDIANA
  
CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
GARY /AIRPORT/ MOCLDY    75  75 100 CALM      30.16R                  
KNOX *+        LGT RAIN  72  72 100 SE6       30.17R                  
LA PORTE +     RAIN      73  73 100 S7        30.18R                  
MICHIGAN CITY+ CLOUDY    72  70  94 S5        30.19R                  
MONTICELLO +   CLOUDY    74  71  89 CALM      30.18R                  
RENSSELAER +   LGT RAIN  72  72 100 E7        30.17F                  
VALPARAISO     CLOUDY    72  70  93 CALM      30.16F                  

$$


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

Saint John, IN

Tonight
Thunderstorms
65°18°
70%
Wednesday
Thunderstorms
75°/ 65° 24°/ 18°
50%
Thursday
Thunderstorms
78°/ 65° 26°/ 18°
50%
Friday
Thunderstorms
78°/ 62° 26°/ 17°
50%
Saturday
Thunderstorms
85°/ 65° 29°/ 18°
70%
Sunday
Rain Showers
78°/ 60° 26°/ 16°
50%
Monday
Rain Showers
75°/ 58° 24°/ 14°
40%
Tuesday
Cloudy
72°22°
0%

Night: Showers and thunderstorms likely. Lows in the mid 60s. North winds around 5 mph. Chance of precipitation 70 percent.

Calumet City, IL

Tonight
Thunderstorms
65°18°
50%
Wednesday
Thunderstorms
75°/ 68° 24°/ 20°
40%
Thursday
Thunderstorms
78°/ 65° 26°/ 18°
50%
Friday
Thunderstorms
78°/ 65° 26°/ 18°
50%
Saturday
Thunderstorms
82°/ 68° 28°/ 20°
70%
Sunday
Rain Showers
78°/ 62° 26°/ 17°
50%
Monday
Rain Showers
72°/ 58° 22°/ 14°
40%
Tuesday
Mostly Cloudy
72°22°
0%

Night: Cloudy. A slight chance of showers and thunderstorms late in the evening, then a chance of showers and thunderstorms in the late evening and overnight. Lows in the mid 60s. North winds around 5 mph. Chance of precipitation 50 percent.

Crete, IL

Tonight
Thunderstorms
65°18°
70%
Wednesday
Thunderstorms
78°/ 65° 26°/ 18°
50%
Thursday
Thunderstorms
78°/ 65° 26°/ 18°
50%
Friday
Thunderstorms
78°/ 65° 26°/ 18°
50%
Saturday
Thunderstorms
85°/ 65° 29°/ 18°
70%
Sunday
Rain Showers
78°/ 60° 26°/ 16°
50%
Monday
Rain Showers
72°/ 58° 22°/ 14°
40%
Tuesday
Cloudy
72°22°
0%

Night: A chance of showers and thunderstorms late in the evening, then showers and thunderstorms likely in the late evening and overnight. Lows in the mid 60s. North winds around 5 mph. Chance of precipitation 70 percent.

Portage, IN

Tonight
Thunderstorms
65°18°
70%
Wednesday
Thunderstorms
78°/ 65° 26°/ 18°
40%
Thursday
Thunderstorms
75°/ 65° 24°/ 18°
50%
Friday
Thunderstorms
78°/ 62° 26°/ 17°
50%
Saturday
Thunderstorms
82°/ 65° 28°/ 18°
70%
Sunday
Rain Showers
78°/ 60° 26°/ 16°
50%
Monday
Rain Showers
75°/ 58° 24°/ 14°
30%
Tuesday
Mostly Cloudy
75°24°
0%

Night: Showers and thunderstorms likely. Lows in the mid 60s. North winds around 5 mph. Chance of precipitation 70 percent.

Chicago, IL

Tonight
Thunderstorms
65°18°
50%
Wednesday
Thunderstorms
72°/ 68° 22°/ 20°
40%
Thursday
Thunderstorms
75°/ 65° 24°/ 18°
40%
Friday
Thunderstorms
75°/ 65° 24°/ 18°
60%
Saturday
Thunderstorms
82°/ 68° 28°/ 20°
70%
Sunday
Rain Showers
75°/ 62° 24°/ 17°
50%
Monday
Rain Showers
72°/ 62° 22°/ 17°
40%
Tuesday
Mostly Cloudy
72°22°
0%

Night: Cloudy. A slight chance of showers late in the evening. A slight chance of thunderstorms. A chance of showers in the late evening and overnight. Lows in the mid 60s. North winds 5 to 10 mph. Chance of precipitation 50 percent.

Kankakee, IL

Tonight
Thunderstorms
68°20°
70%
Wednesday
Thunderstorms
78°/ 68° 26°/ 20°
50%
Thursday
Thunderstorms
78°/ 65° 26°/ 18°
50%
Friday
Thunderstorms
80°/ 65° 27°/ 18°
40%
Saturday
Thunderstorms
85°/ 65° 29°/ 18°
70%
Sunday
Rain Showers
80°/ 62° 27°/ 17°
50%
Monday
Rain Showers
75°/ 58° 24°/ 14°
40%
Tuesday
Cloudy
75°24°
0%

Night: Showers and thunderstorms likely. Lows in the upper 60s. North winds around 5 mph. Chance of precipitation 70 percent.

Joliet, IL

Tonight
Thunderstorms
65°18°
50%
Wednesday
Thunderstorms
75°/ 65° 24°/ 18°
50%
Thursday
Thunderstorms
78°/ 65° 26°/ 18°
50%
Friday
Thunderstorms
78°/ 65° 26°/ 18°
50%
Saturday
Thunderstorms
82°/ 65° 28°/ 18°
70%
Sunday
Rain Showers
78°/ 62° 26°/ 17°
50%
Monday
Rain Showers
72°/ 58° 22°/ 14°
30%
Tuesday
Mostly Cloudy
72°22°
0%

Night: Cloudy. A slight chance of showers and thunderstorms late in the evening, then a chance of showers and thunderstorms in the late evening and overnight. Lows in the mid 60s. North winds around 5 mph. Chance of precipitation 50 percent.

Roselawn, IN

Tonight
Thunderstorms
68°20°
70%
Wednesday
Thunderstorms
82°/ 68° 28°/ 20°
50%
Thursday
Thunderstorms
80°/ 65° 27°/ 18°
50%
Friday
Thunderstorms
80°/ 65° 27°/ 18°
40%
Saturday
Thunderstorms
85°/ 65° 29°/ 18°
70%
Sunday
Rain Showers
82°/ 62° 28°/ 17°
50%
Monday
Rain Showers
75°/ 58° 24°/ 14°
30%
Tuesday
Cloudy
75°24°
0%

Night: Showers and thunderstorms likely. Lows in the upper 60s. North winds around 5 mph. Chance of precipitation 70 percent.

Rensselaer, IN

Tonight
Thunderstorms
68°20°
70%
Wednesday
Thunderstorms
82°/ 68° 28°/ 20°
50%
Thursday
Thunderstorms
80°/ 65° 27°/ 18°
50%
Friday
Thunderstorms
80°/ 62° 27°/ 17°
40%
Saturday
Thunderstorms
85°/ 65° 29°/ 18°
70%
Sunday
Rain Showers
82°/ 62° 28°/ 17°
50%
Monday
Rain Showers
75°/ 58° 24°/ 14°
30%
Tuesday
Cloudy
75°24°
0%

Night: Showers and thunderstorms likely. Lows in the upper 60s. North winds around 5 mph. Chance of precipitation 70 percent.

Channahon, IL

Tonight
Thunderstorms
65°18°
70%
Wednesday
Thunderstorms
78°/ 68° 26°/ 20°
50%
Thursday
Thunderstorms
78°/ 65° 26°/ 18°
50%
Friday
Thunderstorms
78°/ 65° 26°/ 18°
40%
Saturday
Thunderstorms
85°/ 68° 29°/ 20°
70%
Sunday
Rain Showers
78°/ 62° 26°/ 17°
50%
Monday
Rain Showers
75°/ 58° 24°/ 14°
30%
Tuesday
Cloudy
75°24°
0%

Night: A chance of showers and thunderstorms late in the evening, then showers and thunderstorms likely in the late evening and overnight. Lows in the mid 60s. North winds around 5 mph. Chance of precipitation 70 percent.

Wanatah, IN

Tonight
Thunderstorms
65°18°
60%
Wednesday
Thunderstorms
78°/ 68° 26°/ 20°
50%
Thursday
Thunderstorms
82°/ 62° 28°/ 17°
50%
Friday
Rain Showers
78°/ 62° 26°/ 17°
40%
Saturday
Thunderstorms
82°/ 65° 28°/ 18°
70%
Sunday
Thunderstorms
78°/ 58° 26°/ 14°
60%
Monday
Thunderstorms
75°/ 55° 24°/ 13°
40%
Tuesday
Rain Showers
75°24°
20%

Night: Showers likely with a chance of thunderstorms. Lows in the mid 60s. North winds around 5 mph. Chance of rain 60 percent.

Michigan City, IN

Tonight
Thunderstorms
65°18°
60%
Wednesday
Thunderstorms
78°/ 65° 26°/ 18°
50%
Thursday
Thunderstorms
78°/ 62° 26°/ 17°
50%
Friday
Rain Showers
78°/ 62° 26°/ 17°
50%
Saturday
Thunderstorms
82°/ 65° 28°/ 18°
70%
Sunday
Thunderstorms
78°/ 58° 26°/ 14°
60%
Monday
Thunderstorms
72°/ 55° 22°/ 13°
40%
Tuesday
Rain Showers
72°22°
20%

Night: Showers likely with a chance of thunderstorms. Lows in the mid 60s. North winds around 5 mph. Chance of rain 60 percent.

Naperville, IL

Tonight
Thunderstorms
65°18°
50%
Wednesday
Thunderstorms
72°/ 65° 22°/ 18°
40%
Thursday
Thunderstorms
78°/ 65° 26°/ 18°
40%
Friday
Thunderstorms
75°/ 65° 24°/ 18°
60%
Saturday
Thunderstorms
82°/ 65° 28°/ 18°
70%
Sunday
Rain Showers
75°/ 62° 24°/ 17°
50%
Monday
Rain Showers
72°/ 58° 22°/ 14°
30%
Tuesday
Mostly Cloudy
72°22°
0%

Night: Cloudy. A slight chance of showers late in the evening. A slight chance of thunderstorms. A chance of showers in the late evening and overnight. Lows in the mid 60s. North winds around 5 mph. Chance of precipitation 50 percent.

Knox, IN

Tonight
Thunderstorms
65°18°
60%
Wednesday
Thunderstorms
82°/ 68° 28°/ 20°
50%
Thursday
Thunderstorms
82°/ 62° 28°/ 17°
50%
Friday
Cloudy
78°/ 62° 26°/ 17°
40%
Saturday
Thunderstorms
85°/ 65° 29°/ 18°
70%
Sunday
Thunderstorms
78°/ 60° 26°/ 16°
60%
Monday
Thunderstorms
75°/ 55° 24°/ 13°
40%
Tuesday
Rain Showers
75°24°
20%

Night: Showers likely with a chance of thunderstorms. Lows in the mid 60s. North winds around 5 mph. Chance of rain 60 percent.

Watseka, IL

Tonight
Thunderstorms
68°20°
70%
Wednesday
Thunderstorms
82°/ 68° 28°/ 20°
50%
Thursday
Thunderstorms
80°/ 65° 27°/ 18°
50%
Friday
Thunderstorms
82°/ 65° 28°/ 18°
20%
Saturday
Thunderstorms
88°/ 68° 31°/ 20°
70%
Sunday
Rain Showers
82°/ 62° 28°/ 17°
50%
Monday
Rain Showers
75°/ 58° 24°/ 14°
30%
Tuesday
Cloudy
75°24°
0%

Night: Showers and thunderstorms likely. Lows in the upper 60s. North winds around 5 mph. Chance of precipitation 70 percent.

Winamac, IN

Tonight
Thunderstorms
65°18°
60%
Wednesday
Thunderstorms
82°/ 68° 28°/ 20°
50%
Thursday
Thunderstorms
85°/ 65° 29°/ 18°
50%
Friday
Thunderstorms
80°/ 62° 27°/ 17°
30%
Saturday
Thunderstorms
85°/ 68° 29°/ 20°
70%
Sunday
Thunderstorms
82°/ 62° 28°/ 17°
60%
Monday
Thunderstorms
75°/ 58° 24°/ 14°
40%
Tuesday
Rain Showers
75°24°
20%

Night: Showers likely with a chance of thunderstorms. Lows in the mid 60s. West winds around 5 mph, becoming north around 5 mph. Chance of rain 60 percent.

Niles, MI

Tonight
Thunderstorms
62°17°
60%
Wednesday
Thunderstorms
78°/ 65° 26°/ 18°
50%
Thursday
Thunderstorms
78°/ 60° 26°/ 16°
50%
Friday
Rain Showers
78°/ 58° 26°/ 14°
60%
Saturday
Thunderstorms
80°/ 62° 27°/ 17°
80%
Sunday
Thunderstorms
75°/ 58° 24°/ 14°
60%
Monday
Thunderstorms
72°/ 55° 22°/ 13°
40%
Tuesday
Rain Showers
75°24°
20%

Night: Mostly cloudy with a chance of thunderstorms. Showers likely late this evening, then a chance of showers. Lows in the lower 60s. North winds around 5 mph. Chance of rain 60 percent.

Evanston, IL

Tonight
Thunderstorms
62°17°
40%
Wednesday
Thunderstorms
72°/ 65° 22°/ 18°
30%
Thursday
Thunderstorms
78°/ 62° 26°/ 17°
40%
Friday
Thunderstorms
72°/ 65° 22°/ 18°
70%
Saturday
Thunderstorms
82°/ 65° 28°/ 18°
70%
Sunday
Rain Showers
75°/ 60° 24°/ 16°
50%
Monday
Rain Showers
72°/ 58° 22°/ 14°
30%
Tuesday
Mostly Cloudy
72°22°
0%

Night: Cloudy. A slight chance of showers late in the evening. A slight chance of thunderstorms. A chance of showers in the late evening and overnight. Lows in the lower 60s. North winds 5 to 10 mph. Chance of precipitation 40 percent.

Morris, IL

Tonight
Thunderstorms
65°18°
70%
Wednesday
Thunderstorms
78°/ 68° 26°/ 20°
50%
Thursday
Thunderstorms
78°/ 65° 26°/ 18°
50%
Friday
Thunderstorms
80°/ 68° 27°/ 20°
40%
Saturday
Thunderstorms
88°/ 68° 31°/ 20°
70%
Sunday
Rain Showers
80°/ 62° 27°/ 17°
50%
Monday
Rain Showers
75°/ 58° 24°/ 14°
30%
Tuesday
Mostly Cloudy
75°24°
0%

Night: A chance of showers and thunderstorms late in the evening, then showers and thunderstorms likely in the late evening and overnight. Lows in the mid 60s. North winds around 5 mph. Chance of precipitation 70 percent.

Oswego, IL

Tonight
Thunderstorms
65°18°
50%
Wednesday
Thunderstorms
75°/ 65° 24°/ 18°
50%
Thursday
Thunderstorms
78°/ 65° 26°/ 18°
50%
Friday
Thunderstorms
78°/ 65° 26°/ 18°
50%
Saturday
Thunderstorms
85°/ 65° 29°/ 18°
70%
Sunday
Rain Showers
78°/ 62° 26°/ 17°
50%
Monday
Rain Showers
75°/ 58° 24°/ 14°
30%
Tuesday
Cloudy
75°24°
0%

Night: Cloudy. A slight chance of showers and thunderstorms late in the evening, then a chance of showers and thunderstorms in the late evening and overnight. Lows in the mid 60s. North winds around 5 mph. Chance of precipitation 50 percent.

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