Marathon, IA Weather Forecast & Current Conditions

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Marathon Weather Map
UTC Time: 9/16/2026, 23:39
Your Time:
Aeronautical Observation: Automated synoptic observations via NWS Gateway.
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Marathon, IA Regional Weather

Expires:202609170000;;570715
ASUS43 KFSD 162310
RWRFSD

WEATHER ROUNDUP FOR SE SOUTH DAKOTA/SW MINNESOTA/NW IOWA
NATIONAL WEATHER SERVICE SIOUX FALLS SD
600 PM CDT WED SEP 16 2026

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



IAZ001>003-012>014-020>022-031-032-NEZ013-014-SDZ071-170000-
NORTHWEST IOWA
  
CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
CHEROKEE       LGT RAIN  68  63  83 S2        30.20R TC  20           
DENISON        CLOUDY    70  66  88 SE5       30.20F TC  21           
ESTHERVILLE    CLOUDY    71  54  54 SE8       30.20F TC  22           
LE MARS        CLOUDY   N/A N/A N/A SE6       30.17F FOG              
MAURICE        CLOUDY    64  64 100 SE6       30.19S TC  18           
SHELDON        CLOUDY    68  61  77 SE7       30.18S TC  20           
SIOUX CITY     LGT RAIN  66  63  90 CALM      30.18S TC  19           
SPENCER        CLOUDY    70  56  61 SE9       30.20S TC  21           
STORM LAKE     CLOUDY    68  61  77 SE9G16    30.21S TC  20           
$$
 
ABBREVIATIONS USED IN REMARKS
   TC - TEMPERATURE IN CELSIUS
  WCI - WIND CHILL INDEX
   HX - HEAT INDEX
  VSB - VISIBILITY

  

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

Marathon, IA

Tonight
Rain Showers
60°16°
40%
Thursday
Sprinkles
72°/ 62° 22°/ 17°
70%
Friday
Thunderstorms
82°/ 65° 28°/ 18°
80%
Saturday
Rain Showers
72°/ 58° 22°/ 14°
20%
Sunday
Rain Showers
62°/ 55° 17°/ 13°
50%
Monday
Rain Showers
62°/ 55° 17°/ 13°
50%
Tuesday
Mostly Cloudy
68°/ 52° 20°/ 11°
0%
Wednesday
Partly Cloudy
72°22°
0%

Night: Cloudy with a 40 percent chance of showers. Patchy fog. Lows around 60. Southeast winds around 5 mph this evening, becoming light and variable.

Spencer, IA

Tonight
Rain Showers
60°16°
40%
Thursday
Sprinkles
75°/ 62° 24°/ 17°
70%
Friday
Thunderstorms
82°/ 62° 28°/ 17°
70%
Saturday
Rain Showers
72°/ 58° 22°/ 14°
20%
Sunday
Rain Showers
62°/ 55° 17°/ 13°
50%
Monday
Rain Showers
62°/ 52° 17°/ 11°
40%
Tuesday
Mostly Cloudy
68°/ 52° 20°/ 11°
0%
Wednesday
Partly Cloudy
72°22°
0%

Night: Cloudy. A chance of showers this evening, then a chance of sprinkles after midnight. Areas of fog after midnight. Not as cool with lows around 60. Southeast winds 5 to 10 mph, becoming south after midnight. Chance of rain 40 percent.

Cherokee, IA

Tonight
Rain Showers
62°17°
40%
Thursday
Rain Showers
72°/ 62° 22°/ 17°
70%
Friday
Thunderstorms
82°/ 65° 28°/ 18°
70%
Saturday
Mostly Cloudy
72°/ 58° 22°/ 14°
0%
Sunday
Rain Showers
62°/ 55° 17°/ 13°
40%
Monday
Rain Showers
65°/ 52° 18°/ 11°
40%
Tuesday
Mostly Cloudy
68°/ 52° 20°/ 11°
0%
Wednesday
Partly Cloudy
70°21°
0%

Night: Cloudy. A chance of showers this evening, then a chance of sprinkles after midnight. Patchy fog this evening, then areas of fog after midnight. Lows in the lower 60s. Southeast winds around 5 mph this evening, becoming light and variable. Chance of rain 40 percent.

Sheldon, IA

Tonight
Rain Showers
60°16°
40%
Thursday
Sprinkles
75°/ 62° 24°/ 17°
70%
Friday
Thunderstorms
82°/ 62° 28°/ 17°
70%
Saturday
Mostly Cloudy
70°/ 58° 21°/ 14°
0%
Sunday
Rain Showers
62°/ 55° 17°/ 13°
40%
Monday
Rain Showers
62°/ 52° 17°/ 11°
40%
Tuesday
Mostly Cloudy
68°/ 52° 20°/ 11°
0%
Wednesday
Partly Cloudy
72°22°
0%

Night: Cloudy. A chance of showers this evening. Areas of fog after midnight. Not as cool with lows around 60. Southeast winds 5 to 10 mph, becoming south after midnight. Chance of rain 40 percent.

Spirit Lake, IA

Tonight
Rain Showers
60°16°
40%
Thursday
Mostly Cloudy
75°/ 62° 24°/ 17°
90%
Friday
Thunderstorms
80°/ 62° 27°/ 17°
80%
Saturday
Mostly Cloudy
68°/ 58° 20°/ 14°
0%
Sunday
Rain Showers
62°/ 55° 17°/ 13°
50%
Monday
Rain Showers
62°/ 52° 17°/ 11°
50%
Tuesday
Mostly Cloudy
68°/ 52° 20°/ 11°
0%
Wednesday
Partly Cloudy
72°22°
0%

Night: Cloudy with a 40 percent chance of showers. Patchy fog after midnight. Not as cool with lows around 60. Southeast winds 5 to 10 mph.

Ida Grove, IA

Tonight
Rain Showers
62°17°
40%
Thursday
Rain Showers
72°/ 65° 22°/ 18°
70%
Friday
Thunderstorms
85°/ 65° 29°/ 18°
70%
Saturday
Rain Showers
72°/ 58° 22°/ 14°
20%
Sunday
Rain Showers
65°/ 55° 18°/ 13°
50%
Monday
Rain Showers
65°/ 55° 18°/ 13°
40%
Tuesday
Mostly Cloudy
68°/ 55° 20°/ 13°
0%
Wednesday
Partly Cloudy
68°20°
0%

Night: Cloudy with a 40 percent chance of showers. Patchy fog. Near steady temperature in the lower 60s. Southeast winds around 5 mph this evening, becoming light and variable.

Sibley, IA

Tonight
Rain Showers
60°16°
40%
Thursday
Mostly Cloudy
75°/ 62° 24°/ 17°
90%
Friday
Thunderstorms
82°/ 62° 28°/ 17°
70%
Saturday
Mostly Cloudy
68°/ 55° 20°/ 13°
0%
Sunday
Rain Showers
62°/ 55° 17°/ 13°
40%
Monday
Rain Showers
62°/ 52° 17°/ 11°
40%
Tuesday
Mostly Cloudy
68°/ 52° 20°/ 11°
0%
Wednesday
Partly Cloudy
72°22°
0%

Night: Cloudy. A chance of showers this evening, then a chance of sprinkles after midnight. Patchy fog after midnight. Not as cool with lows around 60. Southeast winds 5 to 10 mph. Chance of rain 40 percent.

Sioux City, IA

Tonight
Rain Showers
62°17°
40%
Thursday
Rain Showers
72°/ 65° 22°/ 18°
60%
Friday
Thunderstorms
85°/ 65° 29°/ 18°
60%
Saturday
Mostly Cloudy
72°/ 58° 22°/ 14°
0%
Sunday
Rain Showers
65°/ 55° 18°/ 13°
40%
Monday
Rain Showers
65°/ 55° 18°/ 13°
40%
Tuesday
Partly Cloudy
68°/ 55° 20°/ 13°
0%
Wednesday
Partly Cloudy
70°21°
0%

Night: Cloudy. A chance of showers this evening, then a chance of sprinkles after midnight. Patchy fog after midnight. Near steady temperature in the lower 60s. Southeast winds around 5 mph this evening, becoming light and variable. Chance of rain 40 percent.

Sioux Center, IA

Tonight
Rain Showers
60°16°
30%
Thursday
Mostly Cloudy
75°/ 62° 24°/ 17°
70%
Friday
Thunderstorms
82°/ 62° 28°/ 17°
60%
Saturday
Cloudy
70°/ 58° 21°/ 14°
0%
Sunday
Rain Showers
62°/ 55° 17°/ 13°
40%
Monday
Rain Showers
65°/ 52° 18°/ 11°
40%
Tuesday
Mostly Cloudy
68°/ 55° 20°/ 13°
0%
Wednesday
Partly Cloudy
72°22°
0%

Night: Cloudy. A chance of showers this evening. Patchy fog after midnight. Lows around 60. Southeast winds 5 to 10 mph this evening, becoming light and variable. Chance of rain 30 percent.

Fairmont, MN

Tonight
Thunderstorms
60°16°
50%
Thursday
Mostly Cloudy
75°/ 60° 24°/ 16°
80%
Friday
Thunderstorms
78°/ 62° 26°/ 17°
90%
Saturday
Mostly Cloudy
68°/ 58° 20°/ 14°
0%
Sunday
Rain Showers
62°/ 55° 17°/ 13°
50%
Monday
Rain Showers
62°/ 52° 17°/ 11°
50%
Tuesday
Partly Cloudy
65°/ 52° 18°/ 11°
0%
Wednesday
Partly Cloudy
72°22°
0%

Night: Warmer. Mostly cloudy. Slight chance of thunderstorms in the evening. Chance of showers in the late evening and early morning. Slight chance of showers late in the night. Patchy fog after midnight. Lows around 60. Southeast winds up to 10 mph. Chance of precipitation 50 percent.

Le Mars, IA

Tonight
Rain Showers
62°17°
40%
Thursday
Sprinkles
72°/ 65° 22°/ 18°
70%
Friday
Thunderstorms
85°/ 65° 29°/ 18°
50%
Saturday
Mostly Cloudy
70°/ 58° 21°/ 14°
0%
Sunday
Rain Showers
65°/ 55° 18°/ 13°
40%
Monday
Rain Showers
65°/ 55° 18°/ 13°
40%
Tuesday
Partly Cloudy
68°/ 55° 20°/ 13°
0%
Wednesday
Partly Cloudy
72°22°
0%

Night: Cloudy. A chance of showers this evening. Areas of fog after midnight. Near steady temperature in the lower 60s. Southeast winds 5 to 10 mph this evening, becoming light and variable. Chance of rain 40 percent.

Jackson, MN

Tonight
Rain Showers
58°14°
40%
Thursday
Mostly Cloudy
75°/ 62° 24°/ 17°
90%
Friday
Thunderstorms
78°/ 60° 26°/ 16°
90%
Saturday
Mostly Cloudy
68°/ 55° 20°/ 13°
0%
Sunday
Rain Showers
62°/ 55° 17°/ 13°
50%
Monday
Rain Showers
62°/ 52° 17°/ 11°
50%
Tuesday
Mostly Cloudy
68°/ 52° 20°/ 11°
0%
Wednesday
Partly Cloudy
72°22°
0%

Night: Mostly cloudy with a 40 percent chance of showers. Patchy fog after midnight. Not as cool with lows in the upper 50s. Southeast winds 5 to 10 mph.

Worthington, MN

Tonight
Rain Showers
58°14°
40%
Thursday
Mostly Cloudy
75°/ 62° 24°/ 17°
90%
Friday
Thunderstorms
78°/ 58° 26°/ 14°
90%
Saturday
Cloudy
68°/ 55° 20°/ 13°
0%
Sunday
Rain Showers
62°/ 52° 17°/ 11°
50%
Monday
Rain Showers
62°/ 52° 17°/ 11°
50%
Tuesday
Mostly Cloudy
68°/ 52° 20°/ 11°
0%
Wednesday
Partly Cloudy
72°22°
0%

Night: Cloudy. A chance of showers this evening, then a chance of sprinkles after midnight. Patchy fog after midnight. Not as cool with lows in the upper 50s. Southeast winds 5 to 10 mph. Chance of rain 40 percent.

Rock Rapids, IA

Tonight
Rain Showers
58°14°
40%
Thursday
Mostly Cloudy
75°/ 62° 24°/ 17°
90%
Friday
Thunderstorms
82°/ 62° 28°/ 17°
70%
Saturday
Cloudy
70°/ 55° 21°/ 13°
0%
Sunday
Rain Showers
62°/ 55° 17°/ 13°
50%
Monday
Rain Showers
65°/ 52° 18°/ 11°
50%
Tuesday
Mostly Cloudy
68°/ 52° 20°/ 11°
0%
Wednesday
Partly Cloudy
72°22°
0%

Night: Cloudy. A chance of showers this evening. Patchy fog after midnight. Not as cool with lows in the upper 50s. Southeast winds around 5 mph this evening, becoming light and variable. Chance of rain 40 percent.

Onawa, IA

Tonight
Thunderstorms
65°18°
40%
Thursday
Rain Showers
75°/ 65° 24°/ 18°
50%
Friday
Thunderstorms
85°/ 65° 29°/ 18°
70%
Saturday
Mostly Cloudy
72°/ 60° 22°/ 16°
20%
Sunday
Thunderstorms
62°/ 58° 17°/ 14°
50%
Monday
Rain Showers
65°/ 55° 18°/ 13°
20%
Tuesday
Partly Cloudy
68°/ 55° 20°/ 13°
20%
Wednesday
Partly Cloudy
70°21°
0%

Night: Cloudy with a slight chance of thunderstorms. A chance of showers, mainly this evening. Patchy fog after midnight. Near steady temperature in the mid 60s. Southeast winds around 5 mph this evening, becoming light and variable. Chance of rain 40 percent.

Blue Earth, MN

Tonight
Thunderstorms
62°17°
50%
Thursday
Rain Showers
75°/ 60° 24°/ 16°
70%
Friday
Thunderstorms
75°/ 62° 24°/ 17°
100%
Saturday
Rain Showers
70°/ 58° 21°/ 14°
50%
Sunday
Rain Showers
62°/ 55° 17°/ 13°
50%
Monday
Rain Showers
62°/ 52° 17°/ 11°
50%
Tuesday
Partly Cloudy
65°/ 52° 18°/ 11°
0%
Wednesday
Partly Cloudy
70°21°
0%

Night: Warmer. Mostly cloudy. Slight chance of thunderstorms late in the evening. Chance of rain showers in the late evening and early morning. Slight chance of rain showers late in the night. Patchy fog after midnight. Lows in the lower 60s. Southeast winds up to 10 mph in the evening becoming light. Chance of precipitation 50 percent.

St James, MN

Tonight
Thunderstorms
58°14°
50%
Thursday
Partly Cloudy
75°/ 60° 24°/ 16°
80%
Friday
Thunderstorms
75°/ 60° 24°/ 16°
100%
Saturday
Mostly Cloudy
68°/ 55° 20°/ 13°
0%
Sunday
Rain Showers
62°/ 55° 17°/ 13°
50%
Monday
Rain Showers
62°/ 52° 17°/ 11°
50%
Tuesday
Partly Cloudy
68°/ 52° 20°/ 11°
0%
Wednesday
Partly Cloudy
72°22°
0%

Night: Warmer. Mostly cloudy. Slight chance of thunderstorms in the evening. Chance of showers in the late evening and early morning. Slight chance of showers late in the night. Patchy fog after midnight. Lows in the upper 50s. Southeast winds up to 10 mph in the evening becoming light. Chance of precipitation 50 percent.

Windom, MN

Tonight
Rain Showers
58°14°
40%
Thursday
Mostly Cloudy
75°/ 58° 24°/ 14°
90%
Friday
Thunderstorms
75°/ 58° 24°/ 14°
100%
Saturday
Mostly Cloudy
68°/ 55° 20°/ 13°
0%
Sunday
Rain Showers
65°/ 52° 18°/ 11°
50%
Monday
Rain Showers
62°/ 52° 17°/ 11°
50%
Tuesday
Partly Cloudy
68°/ 52° 20°/ 11°
0%
Wednesday
Partly Cloudy
72°22°
0%

Night: Mostly cloudy. A chance of showers this evening, then a chance of sprinkles after midnight. Patchy fog after midnight. Not as cool with lows in the upper 50s. East winds 5 to 10 mph. Chance of rain 40 percent.

Harlan, IA

Tonight
Thunderstorms
65°18°
40%
Thursday
Rain Showers
75°/ 65° 24°/ 18°
40%
Friday
Sunny
85°/ 65° 29°/ 18°
70%
Saturday
Thunderstorms
75°/ 60° 24°/ 16°
50%
Sunday
Thunderstorms
65°/ 58° 18°/ 14°
50%
Monday
Thunderstorms
65°/ 55° 18°/ 13°
40%
Tuesday
Rain Showers
68°/ 55° 20°/ 13°
20%
Wednesday
Partly Cloudy
68°20°
0%

Night: Cloudy. A slight chance of showers and thunderstorms this evening, then a chance of showers and thunderstorms after midnight. Patchy fog after midnight. Near steady temperature in the mid 60s. Southeast winds around 5 mph this evening, becoming light and variable. Chance of rain 40 percent.

Luverne, MN

Tonight
Rain Showers
58°14°
40%
Thursday
Mostly Cloudy
75°/ 62° 24°/ 17°
100%
Friday
Thunderstorms
80°/ 58° 27°/ 14°
70%
Saturday
Cloudy
68°/ 55° 20°/ 13°
0%
Sunday
Rain Showers
62°/ 52° 17°/ 11°
50%
Monday
Rain Showers
62°/ 52° 17°/ 11°
50%
Tuesday
Mostly Cloudy
68°/ 52° 20°/ 11°
0%
Wednesday
Partly Cloudy
72°22°
0%

Night: Cloudy. A chance of showers this evening. Patchy fog after midnight. Not as cool with lows in the upper 50s. Southeast winds 5 to 10 mph this evening, becoming light and variable. Chance of rain 40 percent.

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