Marathon, IA Weather Forecast & Current Conditions

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Marathon Weather Map
UTC Time: 9/21/2026, 20:15
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Aeronautical Observation: Automated synoptic observations via NWS Gateway.
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Marathon, IA Regional Weather

Expires:202609212100;;835673
ASUS43 KFSD 212010
RWRFSD

WEATHER ROUNDUP FOR SE SOUTH DAKOTA/SW MINNESOTA/NW IOWA
NATIONAL WEATHER SERVICE SIOUX FALLS SD
300 PM CDT MON SEP 21 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-SDZ071-212100-
NORTHWEST IOWA
  
CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
CHEROKEE       DRIZZLE   57  57 100 NE7       30.17S FOG     TC  14   
DENISON        PTSUNNY   59  59 100 E8        30.14F TC  15           
ESTHERVILLE    LGT RAIN  55  53  93 NE7       30.19S FOG     TC  13   
LE MARS        CLOUDY   N/A N/A N/A NE7       30.15F                  
MAURICE        PTSUNNY   57  57 100 E8        30.17S TC  14           
SHELDON        PTSUNNY   55  55 100 E6        30.16S FOG     TC  13   
SIOUX CITY     CLOUDY    59  56  89 NE9       30.16S TC  15           
SPENCER        CLOUDY    55  54  96 E8        30.18F TC  13           
STORM LAKE     PTSUNNY   55  55 100 NE6       30.16F FOG     TC  13   
$$
 
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

Afternoon
Thunderstorms
55°/ 52° 13°/ 11°
70%
Tuesday
Mostly Cloudy
58°/ 45° 14°/
0%
Wednesday
Partly Cloudy
65°/ 52° 18°/ 11°
50%
Thursday
Rain Showers
62°/ 52° 17°/ 11°
80%
Friday
Rain Showers
65°/ 55° 18°/ 13°
60%
Saturday
Rain Showers
68°/ 58° 20°/ 14°
60%
Sunday
Mostly Cloudy
72°22°
0%

Day: Showers likely with a slight chance of thunderstorms. Patchy fog. Near steady temperature in the mid 50s. Northeast winds 5 to 10 mph. Chance of rain 70 percent.

Night: Cloudy. A chance of showers in the evening. Patchy fog. Near steady temperature in the lower 50s. Northeast winds 5 to 10 mph. Chance of rain 50 percent.

Spencer, IA

Afternoon
Rain Showers
55°/ 48° 13°/
70%
Tuesday
Mostly Cloudy
58°/ 45° 14°/
0%
Wednesday
Partly Cloudy
65°/ 50° 18°/ 10°
50%
Thursday
Rain Showers
62°/ 52° 17°/ 11°
70%
Friday
Rain Showers
65°/ 55° 18°/ 13°
60%
Saturday
Rain Showers
68°/ 55° 20°/ 13°
60%
Sunday
Partly Cloudy
72°22°
0%

Day: Showers likely. Patchy fog. Near steady temperature in the mid 50s. Northeast winds around 10 mph. Chance of rain 70 percent.

Night: Cloudy. A chance of showers in the evening. Patchy fog. Lows in the upper 40s. Northeast winds 5 to 10 mph. Chance of rain 50 percent.

Cherokee, IA

Afternoon
Rain Showers
55°/ 55° 13°/ 13°
50%
Tuesday
Mostly Cloudy
60°/ 48° 16°/
0%
Wednesday
Mostly Cloudy
65°/ 52° 18°/ 11°
70%
Thursday
Rain Showers
62°/ 52° 17°/ 11°
80%
Friday
Rain Showers
65°/ 55° 18°/ 13°
70%
Saturday
Rain Showers
70°/ 58° 21°/ 14°
50%
Sunday
Mostly Cloudy
72°22°
0%

Day: Cloudy with a 50 percent chance of showers. Patchy fog. Near steady temperature in the mid 50s. Northeast winds 5 to 10 mph.

Night: Cloudy. A chance of showers in the evening. Patchy fog. Near steady temperature in the mid 50s. Northeast winds 5 to 10 mph. Chance of rain 50 percent.

Sheldon, IA

Afternoon
Rain Showers
55°/ 52° 13°/ 11°
50%
Tuesday
Mostly Cloudy
58°/ 45° 14°/
0%
Wednesday
Mostly Cloudy
65°/ 52° 18°/ 11°
70%
Thursday
Rain Showers
62°/ 52° 17°/ 11°
70%
Friday
Rain Showers
65°/ 55° 18°/ 13°
60%
Saturday
Rain Showers
68°/ 58° 20°/ 14°
60%
Sunday
Partly Cloudy
72°22°
0%

Day: Cloudy with a 50 percent chance of showers. Patchy fog. Near steady temperature in the mid 50s. Northeast winds around 10 mph.

Night: Cloudy. A chance of showers in the evening. Patchy fog. Near steady temperature in the lower 50s. East winds 5 to 10 mph. Chance of rain 50 percent.

Spirit Lake, IA

Afternoon
Rain Showers
52°/ 52° 11°/ 11°
70%
Tuesday
Mostly Cloudy
58°/ 45° 14°/
0%
Wednesday
Sunny
62°/ 52° 17°/ 11°
60%
Thursday
Rain Showers
62°/ 52° 17°/ 11°
70%
Friday
Rain Showers
65°/ 55° 18°/ 13°
50%
Saturday
Rain Showers
68°/ 58° 20°/ 14°
60%
Sunday
Partly Cloudy
70°21°
0%

Day: Showers likely. Patchy fog. Near steady temperature in the lower 50s. Northeast winds around 10 mph. Chance of rain 70 percent.

Night: Cloudy. A chance of showers in the evening. Patchy fog. Near steady temperature in the lower 50s. Northeast winds 5 to 10 mph. Chance of rain 50 percent.

Ida Grove, IA

Afternoon
Rain Showers
55°/ 55° 13°/ 13°
50%
Tuesday
Cloudy
60°/ 48° 16°/
0%
Wednesday
Partly Cloudy
65°/ 52° 18°/ 11°
70%
Thursday
Rain Showers
62°/ 55° 17°/ 13°
80%
Friday
Rain Showers
65°/ 55° 18°/ 13°
70%
Saturday
Rain Showers
72°/ 58° 22°/ 14°
50%
Sunday
Mostly Cloudy
72°22°
0%

Day: Cloudy with a 50 percent chance of showers. Patchy fog. Near steady temperature in the mid 50s. Northeast winds 5 to 10 mph.

Night: Cloudy. A chance of showers in the evening. Patchy fog. Near steady temperature in the mid 50s. Northeast winds 5 to 10 mph. Chance of rain 50 percent.

Sibley, IA

Afternoon
Rain Showers
52°/ 52° 11°/ 11°
70%
Tuesday
Mostly Cloudy
58°/ 45° 14°/
0%
Wednesday
Mostly Cloudy
62°/ 52° 17°/ 11°
70%
Thursday
Rain Showers
62°/ 52° 17°/ 11°
70%
Friday
Rain Showers
65°/ 55° 18°/ 13°
60%
Saturday
Rain Showers
68°/ 55° 20°/ 13°
50%
Sunday
Partly Cloudy
72°22°
0%

Day: Showers likely. Patchy fog. Near steady temperature in the lower 50s. Northeast winds around 10 mph. Chance of rain 70 percent.

Night: Cloudy. A chance of showers in the evening. Patchy fog. Near steady temperature in the lower 50s. East winds 5 to 10 mph. Chance of rain 50 percent.

Sioux City, IA

Afternoon
Rain Showers
58°/ 55° 14°/ 13°
50%
Tuesday
Mostly Cloudy
62°/ 48° 17°/
0%
Wednesday
Mostly Cloudy
65°/ 52° 18°/ 11°
70%
Thursday
Rain Showers
65°/ 55° 18°/ 13°
80%
Friday
Rain Showers
65°/ 58° 18°/ 14°
70%
Saturday
Rain Showers
72°/ 58° 22°/ 14°
50%
Sunday
Mostly Cloudy
72°22°
0%

Day: Mostly cloudy with a 50 percent chance of showers. Patchy fog. Near steady temperature in the upper 50s. Northeast winds 5 to 10 mph.

Night: Cloudy. A chance of showers in the evening. Patchy fog. Near steady temperature in the mid 50s. Northeast winds 5 to 10 mph. Chance of rain 50 percent.

Sioux Center, IA

Afternoon
Rain Showers
55°/ 52° 13°/ 11°
50%
Tuesday
Mostly Cloudy
60°/ 48° 16°/
0%
Wednesday
Mostly Cloudy
65°/ 52° 18°/ 11°
80%
Thursday
Rain Showers
65°/ 55° 18°/ 13°
70%
Friday
Rain Showers
65°/ 55° 18°/ 13°
60%
Saturday
Rain Showers
70°/ 58° 21°/ 14°
50%
Sunday
Partly Cloudy
72°22°
0%

Day: Cloudy with a 50 percent chance of showers. Patchy fog. Near steady temperature in the mid 50s. Northeast winds around 10 mph.

Night: Cloudy. A chance of showers in the evening. Patchy fog. Near steady temperature in the lower 50s. East winds 5 to 10 mph. Chance of rain 40 percent.

Fairmont, MN

Today
Rain Showers
52°/ 45° 11°/
70%
Tuesday
Sunny
60°/ 42° 16°/
0%
Wednesday
Sunny
65°/ 48° 18°/
50%
Thursday
Rain Showers
62°/ 52° 17°/ 11°
50%
Friday
Rain Showers
65°/ 55° 18°/ 13°
40%
Saturday
Rain Showers
62°/ 55° 17°/ 13°
50%
Sunday
Rain Showers
70°21°
30%

Day: Cooler. Rain showers likely. Near steady temperature in the lower 50s. Northeast winds 5 to 10 mph. Chance of showers 70 percent.

Night: Mostly cloudy. A 50 percent chance of rain showers in the evening. Lows in the mid 40s. Northeast winds 5 to 10 mph.

Le Mars, IA

Afternoon
Rain Showers
55°/ 55° 13°/ 13°
40%
Tuesday
Mostly Cloudy
62°/ 48° 17°/
0%
Wednesday
Mostly Cloudy
65°/ 52° 18°/ 11°
70%
Thursday
Rain Showers
65°/ 55° 18°/ 13°
70%
Friday
Rain Showers
68°/ 58° 20°/ 14°
70%
Saturday
Rain Showers
72°/ 58° 22°/ 14°
50%
Sunday
Mostly Cloudy
72°22°
0%

Day: Cloudy with a 40 percent chance of showers. Patchy fog. Near steady temperature in the mid 50s. Northeast winds around 10 mph.

Night: Cloudy. A chance of showers in the evening. Patchy fog. Near steady temperature in the mid 50s. Northeast winds 5 to 10 mph. Chance of rain 40 percent.

Jackson, MN

Afternoon
Rain Showers
52°/ 50° 11°/ 10°
70%
Tuesday
Mostly Cloudy
58°/ 45° 14°/
0%
Wednesday
Sunny
62°/ 50° 17°/ 10°
70%
Thursday
Rain Showers
62°/ 52° 17°/ 11°
70%
Friday
Rain Showers
65°/ 55° 18°/ 13°
50%
Saturday
Rain Showers
65°/ 55° 18°/ 13°
50%
Sunday
Partly Cloudy
68°20°
0%

Day: Showers likely. Patchy fog. Cooler. Near steady temperature in the lower 50s. Northeast winds around 10 mph. Chance of rain 70 percent.

Night: Cloudy. Showers likely in the evening. Patchy fog. Near steady temperature around 50. East winds 5 to 10 mph. Chance of rain 70 percent.

Worthington, MN

Afternoon
Rain Showers
52°/ 50° 11°/ 10°
70%
Tuesday
Mostly Cloudy
58°/ 45° 14°/
0%
Wednesday
Mostly Cloudy
62°/ 50° 17°/ 10°
70%
Thursday
Rain Showers
62°/ 52° 17°/ 11°
70%
Friday
Rain Showers
62°/ 55° 17°/ 13°
60%
Saturday
Rain Showers
68°/ 55° 20°/ 13°
50%
Sunday
Partly Cloudy
68°20°
0%

Day: Showers likely. Patchy fog. Cooler. Near steady temperature in the lower 50s. Northeast winds around 10 mph. Chance of rain 70 percent.

Night: Cloudy. A chance of showers in the evening. Patchy fog. Near steady temperature around 50. East winds 5 to 10 mph. Chance of rain 50 percent.

Rock Rapids, IA

Afternoon
Rain Showers
55°/ 52° 13°/ 11°
50%
Tuesday
Mostly Cloudy
60°/ 48° 16°/
0%
Wednesday
Mostly Cloudy
65°/ 52° 18°/ 11°
80%
Thursday
Rain Showers
65°/ 52° 18°/ 11°
50%
Friday
Rain Showers
65°/ 55° 18°/ 13°
60%
Saturday
Rain Showers
68°/ 55° 20°/ 13°
50%
Sunday
Partly Cloudy
72°22°
0%

Day: Cloudy with a 50 percent chance of showers. Patchy fog. Near steady temperature in the mid 50s. Northeast winds around 10 mph.

Night: Cloudy. A chance of showers in the evening. Patchy fog. Near steady temperature in the lower 50s. East winds 5 to 10 mph. Chance of rain 50 percent.

Onawa, IA

Afternoon
Rain
58°/ 55° 14°/ 13°
50%
Tuesday
Mostly Cloudy
62°/ 50° 17°/ 10°
0%
Wednesday
Mostly Cloudy
65°/ 52° 18°/ 11°
70%
Thursday
Thunderstorms
62°/ 55° 17°/ 13°
80%
Friday
Thunderstorms
65°/ 58° 18°/ 14°
70%
Saturday
Thunderstorms
72°/ 58° 22°/ 14°
50%
Sunday
Rain Showers
75°24°
20%

Day: Cloudy with a chance of rain. A chance of drizzle. Patchy fog. Near steady temperature in the upper 50s. East winds 5 to 10 mph. Chance of rain 50 percent.

Night: Cloudy. A chance of rain in the evening. Patchy fog. Near steady temperature in the mid 50s. Temperature rising into the mid 50s after midnight. Northeast winds 5 to 10 mph. Chance of rain 50 percent.

Blue Earth, MN

Today
Rain Showers
55°/ 45° 13°/
70%
Tuesday
Sunny
60°/ 42° 16°/
0%
Wednesday
Sunny
65°/ 48° 18°/
0%
Thursday
Rain Showers
62°/ 52° 17°/ 11°
50%
Friday
Partly Cloudy
65°/ 55° 18°/ 13°
30%
Saturday
Rain Showers
62°/ 55° 17°/ 13°
50%
Sunday
Rain Showers
70°21°
40%

Day: Cooler. Chance of rain showers early in the morning, then rain showers likely in the late morning and afternoon. Highs in the mid 50s. Northeast winds 5 to 10 mph. Chance of showers 70 percent.

Night: Cloudy with a 50 percent chance of rain showers in the evening, then partly cloudy after midnight. Lows in the mid 40s. Northeast winds 5 to 10 mph.

St James, MN

Today
Rain Showers
52°/ 45° 11°/
70%
Tuesday
Sunny
62°/ 42° 17°/
0%
Wednesday
Sunny
65°/ 48° 18°/
50%
Thursday
Rain Showers
65°/ 52° 18°/ 11°
50%
Friday
Partly Cloudy
68°/ 55° 20°/ 13°
40%
Saturday
Rain Showers
65°/ 55° 18°/ 13°
50%
Sunday
Partly Cloudy
72°22°
0%

Day: Cooler. Rain showers likely. Near steady temperature in the lower 50s. Northeast winds 5 to 10 mph. Chance of showers 70 percent.

Night: Mostly cloudy. A 50 percent chance of rain showers in the evening. Lows in the mid 40s. Northeast winds 5 to 10 mph.

Windom, MN

Afternoon
Rain Showers
52°/ 50° 11°/ 10°
70%
Tuesday
Sunny
58°/ 45° 14°/
0%
Wednesday
Sunny
62°/ 50° 17°/ 10°
70%
Thursday
Rain Showers
62°/ 52° 17°/ 11°
70%
Friday
Rain Showers
62°/ 55° 17°/ 13°
40%
Saturday
Rain Showers
65°/ 55° 18°/ 13°
50%
Sunday
Partly Cloudy
68°20°
0%

Day: Showers likely. Patchy fog. Cooler. Near steady temperature in the lower 50s. Northeast winds around 10 mph. Chance of rain 70 percent.

Night: Mostly cloudy. Showers likely in the evening. Patchy fog. Near steady temperature around 50. East winds 5 to 10 mph. Chance of rain 70 percent.

Harlan, IA

Afternoon
Rain
58°/ 55° 14°/ 13°
50%
Tuesday
Cloudy
60°/ 48° 16°/
0%
Wednesday
Partly Cloudy
65°/ 52° 18°/ 11°
50%
Thursday
Thunderstorms
62°/ 55° 17°/ 13°
70%
Friday
Thunderstorms
65°/ 58° 18°/ 14°
70%
Saturday
Thunderstorms
70°/ 58° 21°/ 14°
70%
Sunday
Rain Showers
75°24°
20%

Day: Mostly cloudy with a chance of rain. A chance of drizzle. Patchy fog. Near steady temperature in the upper 50s. Northeast winds 5 to 10 mph. Chance of rain 50 percent.

Night: Cloudy. A chance of rain in the evening. Patchy fog. Near steady temperature in the mid 50s. Northeast winds 5 to 10 mph. Chance of rain 50 percent.

Luverne, MN

Afternoon
Rain Showers
52°/ 50° 11°/ 10°
50%
Tuesday
Mostly Cloudy
58°/ 45° 14°/
0%
Wednesday
Mostly Cloudy
62°/ 52° 17°/ 11°
80%
Thursday
Rain Showers
62°/ 52° 17°/ 11°
50%
Friday
Rain Showers
65°/ 55° 18°/ 13°
60%
Saturday
Rain Showers
68°/ 55° 20°/ 13°
50%
Sunday
Partly Cloudy
70°21°
0%

Day: Cloudy with a 50 percent chance of showers. Patchy fog. Near steady temperature in the lower 50s. Northeast winds around 10 mph with gusts up to 20 mph.

Night: Cloudy. A chance of showers, mainly in the evening. Patchy fog. Near steady temperature around 50. East winds 5 to 10 mph. Chance of rain 50 percent.

Names listed above may include county names.

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