Argonne, SD Weather Forecast & Current Conditions

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Argonne Weather Map
UTC Time: 9/21/2026, 21:53
Your Time:
Aeronautical Observation: Automated synoptic observations via NWS Gateway.
Auto-refresh in: 5:02

Argonne, SD Regional Weather

Expires:202609212200;;837690
ASUS43 KFSD 212110
RWRFSD

WEATHER ROUNDUP FOR SE SOUTH DAKOTA/SW MINNESOTA/NW IOWA
NATIONAL WEATHER SERVICE SIOUX FALLS SD
400 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.



SDZ038>040-050-052>070-212200-
SOUTHEAST SOUTH DAKOTA
  
CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
BROOKINGS      CLOUDY    53  50  89 NE9       30.23S TC  12           
CHAMBERLAIN    CLOUDY    60  53  76 E7        30.23S TC  16           
HURON          PTSUNNY   62  52  69 E10       30.21F TC  17           
MADISON        CLOUDY    54  54 100 NE9       30.21S TC  12           
MITCHELL       CLOUDY    58  54  86 E9        30.21S TC  14           
SIOUX FALLS    LGT RAIN  54  52  93 NE12      30.19S TC  12           
WINNER         CLOUDY    58  54  86 NE13      30.20S TC  14           
YANKTON        LGT RAIN  57  57 100 NE10      30.17S FOG     TC  14   
$$


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

Argonne, SD

Tonight
Rain Showers
48°
50%
Tuesday
Drizzle
62°/ 48° 17°/
0%
Wednesday
Rain Showers
65°/ 52° 18°/ 11°
70%
Thursday
Rain Showers
68°/ 55° 20°/ 13°
30%
Friday
Rain Showers
68°/ 55° 20°/ 13°
40%
Saturday
Cloudy
70°/ 55° 21°/ 13°
0%
Sunday
Sunny
72°/ 55° 22°/ 13°
0%
Monday
Rain Showers
70°21°
50%

Night: A chance of showers this evening. Cloudy with a chance of drizzle. Patchy fog this evening. Areas of fog after midnight. Lows in the upper 40s. East winds 5 to 10 mph. Chance of rain 50 percent.

De Smet, SD

Tonight
Drizzle
48°
0%
Tuesday
Drizzle
58°/ 48° 14°/
0%
Wednesday
Rain Showers
62°/ 52° 17°/ 11°
70%
Thursday
Rain Showers
68°/ 52° 20°/ 11°
20%
Friday
Rain Showers
65°/ 55° 18°/ 13°
60%
Saturday
Cloudy
68°/ 55° 20°/ 13°
0%
Sunday
Sunny
68°/ 55° 20°/ 13°
0%
Monday
Rain Showers
68°20°
50%

Night: Cloudy with a slight chance of drizzle. Patchy fog after midnight. Lows in the upper 40s. East winds 5 to 10 mph.

Madison, SD

Tonight
Rain Showers
50°10°
50%
Tuesday
Drizzle
58°/ 48° 14°/
0%
Wednesday
Rain Showers
62°/ 52° 17°/ 11°
80%
Thursday
Rain Showers
65°/ 52° 18°/ 11°
40%
Friday
Rain Showers
65°/ 55° 18°/ 13°
60%
Saturday
Rain Showers
68°/ 55° 20°/ 13°
40%
Sunday
Sunny
68°/ 55° 20°/ 13°
0%
Monday
Rain Showers
68°20°
50%

Night: A chance of showers this evening. Cloudy with a chance of drizzle. Patchy fog this evening. Areas of fog after midnight. Near steady temperature around 50. East winds 5 to 10 mph. Chance of rain 50 percent.

Woonsocket, SD

Tonight
Drizzle
52°11°
0%
Tuesday
Drizzle
62°/ 50° 17°/ 10°
20%
Wednesday
Rain Showers
65°/ 55° 18°/ 13°
70%
Thursday
Rain Showers
72°/ 55° 22°/ 13°
30%
Friday
Rain Showers
68°/ 58° 20°/ 14°
50%
Saturday
Cloudy
72°/ 55° 22°/ 13°
0%
Sunday
Sunny
72°/ 55° 22°/ 13°
0%
Monday
Rain Showers
72°22°
50%

Night: Cloudy. A slight chance of drizzle this evening, then a chance of drizzle after midnight. Patchy fog this evening, then areas of fog after midnight. Lows in the lower 50s. East winds 5 to 10 mph.

Salem, SD

Tonight
Rain Showers
52°11°
70%
Tuesday
Drizzle
62°/ 48° 17°/
0%
Wednesday
Rain Showers
65°/ 52° 18°/ 11°
80%
Thursday
Rain Showers
68°/ 55° 20°/ 13°
40%
Friday
Rain Showers
65°/ 58° 18°/ 14°
60%
Saturday
Rain Showers
70°/ 58° 21°/ 14°
30%
Sunday
Sunny
72°/ 55° 22°/ 13°
0%
Monday
Rain Showers
72°22°
50%

Night: Showers likely this evening. Cloudy with a chance of drizzle. Patchy fog this evening. Areas of fog after midnight. Near steady temperature in the lower 50s. East winds 5 to 10 mph. Chance of rain 70 percent.

Alexandria, SD

Tonight
Rain Showers
52°11°
50%
Tuesday
Drizzle
62°/ 50° 17°/ 10°
20%
Wednesday
Rain Showers
65°/ 55° 18°/ 13°
70%
Thursday
Rain Showers
70°/ 55° 21°/ 13°
40%
Friday
Rain Showers
68°/ 58° 20°/ 14°
50%
Saturday
Cloudy
72°/ 58° 22°/ 14°
0%
Sunday
Sunny
72°/ 55° 22°/ 13°
0%
Monday
Rain Showers
72°22°
50%

Night: A chance of showers this evening. Cloudy with a chance of drizzle. Patchy fog this evening. Areas of fog after midnight. Lows in the lower 50s. East winds 5 to 10 mph. Chance of rain 50 percent.

Huron, SD

Tonight
Drizzle
50°10°
0%
Tuesday
Drizzle
62°/ 48° 17°/
20%
Wednesday
Rain Showers
65°/ 55° 18°/ 13°
70%
Thursday
Mostly Cloudy
70°/ 55° 21°/ 13°
0%
Friday
Rain Showers
68°/ 55° 20°/ 13°
50%
Saturday
Mostly Cloudy
72°/ 55° 22°/ 13°
0%
Sunday
Sunny
68°/ 55° 20°/ 13°
40%
Monday
Rain Showers
70°21°
50%

Night: Mostly cloudy. A slight chance of drizzle after midnight. Patchy fog after midnight. Lows around 50. East winds 5 to 10 mph.

Mitchell, SD

Tonight
Drizzle
52°11°
0%
Tuesday
Drizzle
62°/ 50° 17°/ 10°
20%
Wednesday
Rain Showers
65°/ 55° 18°/ 13°
60%
Thursday
Rain Showers
72°/ 55° 22°/ 13°
30%
Friday
Rain Showers
68°/ 58° 20°/ 14°
50%
Saturday
Cloudy
72°/ 55° 22°/ 13°
0%
Sunday
Sunny
72°/ 55° 22°/ 13°
0%
Monday
Rain Showers
72°22°
50%

Night: Cloudy. A chance of drizzle, mainly this evening. Patchy fog this evening, then areas of fog after midnight. Lows in the lower 50s. East winds 5 to 10 mph.

Brookings, SD

Tonight
Drizzle
48°
0%
Tuesday
Drizzle
58°/ 45° 14°/
0%
Wednesday
Mostly Cloudy
62°/ 52° 17°/ 11°
80%
Thursday
Rain Showers
65°/ 52° 18°/ 11°
40%
Friday
Rain Showers
65°/ 55° 18°/ 13°
60%
Saturday
Rain Showers
65°/ 55° 18°/ 13°
50%
Sunday
Sunny
68°/ 55° 20°/ 13°
0%
Monday
Rain Showers
68°20°
50%

Night: Cloudy with a chance of drizzle. Patchy fog. Near steady temperature in the upper 40s. East winds 5 to 10 mph.

Hayti, SD

Tonight
Rain Showers
45°
20%
Tuesday
Mostly Cloudy
60°/ 48° 16°/
0%
Wednesday
Rain Showers
62°/ 52° 17°/ 11°
80%
Thu-Thu Night
Rain Showers
65°18°
20%
Friday
Rain Showers
65°/ 55° 18°/ 13°
50%
Saturday
Rain Showers
68°/ 55° 20°/ 13°
50%
Sunday
Partly Cloudy
68°/ 52° 20°/ 11°
30%
Monday
Rain Showers
68°20°
50%

Night: Mostly cloudy. A slight chance of showers after midnight. Patchy fog after midnight. Lows in the mid 40s. East winds 5 to 10 mph. Chance of rain 20 percent.

Wessington Springs, SD

Tonight
Drizzle
48°
0%
Tuesday
Cloudy
58°/ 50° 14°/ 10°
50%
Wednesday
Rain Showers
65°/ 55° 18°/ 13°
50%
Thursday
Mostly Cloudy
72°/ 55° 22°/ 13°
30%
Friday
Rain Showers
68°/ 58° 20°/ 14°
40%
Saturday
Mostly Cloudy
72°/ 55° 22°/ 13°
0%
Sunday
Sunny
68°/ 55° 20°/ 13°
30%
Monday
Rain Showers
70°21°
50%

Night: Mostly cloudy. Patchy fog this evening, then areas of fog after midnight. A slight chance of drizzle after midnight. Lows in the upper 40s. East winds 5 to 10 mph.

Clark, SD

Tonight
Mostly Cloudy
45°
0%
Tuesday
Mostly Cloudy
62°/ 48° 17°/
0%
Wednesday
Rain Showers
62°/ 52° 17°/ 11°
80%
Thursday
Mostly Cloudy
68°/ 55° 20°/ 13°
20%
Fri Night
Thunderstorms
55°13°
50%
Saturday
Rain Showers
68°/ 55° 20°/ 13°
20%
Sunday
Partly Cloudy
68°/ 55° 20°/ 13°
30%
Monday
Rain Showers
68°20°
50%

Night: Mostly cloudy. Patchy fog after midnight. Lows in the mid 40s. East winds 5 to 10 mph.

Sioux Falls, SD

Tonight
Drizzle
52°11°
0%
Tuesday
Drizzle
60°/ 48° 16°/
0%
Wednesday
Mostly Cloudy
62°/ 52° 17°/ 11°
80%
Thursday
Rain Showers
65°/ 55° 18°/ 13°
50%
Friday
Rain Showers
65°/ 55° 18°/ 13°
60%
Saturday
Rain Showers
68°/ 58° 20°/ 14°
40%
Sunday
Partly Cloudy
72°/ 55° 22°/ 13°
0%
Monday
Rain Showers
70°21°
40%

Night: Cloudy with drizzle. Patchy fog this evening. Areas of fog after midnight. Near steady temperature in the lower 50s. East winds 5 to 10 mph.

Flandreau, SD

Tonight
Drizzle
50°10°
0%
Tuesday
Drizzle
58°/ 45° 14°/
0%
Wednesday
Mostly Cloudy
62°/ 52° 17°/ 11°
80%
Thursday
Rain Showers
65°/ 52° 18°/ 11°
40%
Friday
Rain Showers
65°/ 55° 18°/ 13°
60%
Saturday
Rain Showers
65°/ 55° 18°/ 13°
40%
Sunday
Sunny
68°/ 55° 20°/ 13°
0%
Monday
Rain Showers
68°20°
50%

Night: Cloudy with a chance of drizzle. Patchy fog this evening. Areas of fog after midnight. Near steady temperature around 50. East winds 5 to 10 mph.

Parker, SD

Tonight
Drizzle
55°13°
0%
Tuesday
Drizzle
62°/ 50° 17°/ 10°
0%
Wednesday
Rain Showers
65°/ 55° 18°/ 13°
90%
Thursday
Rain Showers
68°/ 55° 20°/ 13°
50%
Friday
Rain Showers
65°/ 58° 18°/ 14°
50%
Saturday
Rain Showers
70°/ 58° 21°/ 14°
40%
Sunday
Partly Cloudy
72°/ 58° 22°/ 14°
0%
Monday
Rain Showers
72°22°
40%

Night: Cloudy. Drizzle likely, mainly this evening. Patchy fog this evening, then areas of fog after midnight. Near steady temperature in the mid 50s. East winds 5 to 10 mph.

Parkston, SD

Tonight
Drizzle
52°11°
0%
Tuesday
Drizzle
62°/ 50° 17°/ 10°
20%
Wednesday
Rain Showers
65°/ 55° 18°/ 13°
70%
Thursday
Rain Showers
70°/ 55° 21°/ 13°
40%
Friday
Rain Showers
68°/ 58° 20°/ 14°
50%
Saturday
Rain Showers
72°/ 58° 22°/ 14°
50%
Sunday
Partly Cloudy
72°/ 58° 22°/ 14°
0%
Monday
Rain Showers
72°22°
50%

Night: Cloudy. A chance of drizzle, mainly this evening. Patchy fog this evening, then areas of fog after midnight. Lows in the lower 50s. Northeast winds 5 to 10 mph.

Plankinton, SD

Tonight
Drizzle
50°10°
0%
Tuesday
Cloudy
62°/ 50° 17°/ 10°
50%
Wednesday
Rain Showers
65°/ 55° 18°/ 13°
50%
Thursday
Mostly Cloudy
72°/ 55° 22°/ 13°
30%
Friday
Rain Showers
68°/ 58° 20°/ 14°
40%
Saturday
Mostly Cloudy
72°/ 55° 22°/ 13°
0%
Sunday
Sunny
72°/ 55° 22°/ 13°
30%
Monday
Rain Showers
72°22°
50%

Night: Cloudy with a slight chance of drizzle. Patchy fog this evening. Areas of fog after midnight. Lows around 50. East winds 5 to 10 mph.

Redfield, SD

Tonight
Mostly Cloudy
45°
0%
Tuesday
Mostly Cloudy
62°/ 48° 17°/
0%
Wednesday
Thunderstorms
65°/ 52° 18°/ 11°
70%
Thursday
Mostly Cloudy
70°/ 55° 21°/ 13°
20%
Fri Night
Thunderstorms
55°13°
50%
Saturday
Mostly Cloudy
72°/ 52° 22°/ 11°
0%
Sun Night
Thunderstorms
52°11°
40%
Monday
Thunderstorms
68°20°
50%

Night: Partly cloudy this evening, then becoming mostly cloudy. Patchy fog. Lows in the mid 40s. East winds 5 to 10 mph.

Clear Lake, SD

Tonight
Rain Showers
45°
20%
Tuesday
Mostly Cloudy
58°/ 45° 14°/
0%
Wednesday
Partly Cloudy
62°/ 52° 17°/ 11°
90%
Thursday
Rain Showers
65°/ 52° 18°/ 11°
30%
Fri Night-Sat
Rain Showers
55°13°
50%
Sat Night
Rain Showers
55°13°
20%
Sunday
Partly Cloudy
68°/ 52° 20°/ 11°
20%
Monday
Thunderstorms
68°20°
50%

Night: Mostly cloudy. A slight chance of showers after midnight. Patchy fog after midnight. Lows in the mid 40s. East winds 5 to 10 mph. Chance of rain 20 percent.

Watertown, SD

Tonight
Rain Showers
45°
20%
Tuesday
Mostly Cloudy
60°/ 45° 16°/
0%
Wednesday
Rain Showers
62°/ 52° 17°/ 11°
90%
Thursday
Mostly Cloudy
68°/ 55° 20°/ 13°
20%
Friday
Rain Showers
65°/ 55° 18°/ 13°
50%
Saturday
Rain Showers
68°/ 55° 20°/ 13°
50%
Sunday
Partly Cloudy
68°/ 52° 20°/ 11°
30%
Monday
Thunderstorms
68°20°
50%

Night: Mostly cloudy. A slight chance of showers after midnight. Patchy fog after midnight. Lows in the mid 40s. East winds 5 to 10 mph. Chance of rain 20 percent.

Names listed above may include county names.

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