Lyon School, SD Weather Forecast & Current Conditions

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Lyon School Weather Map
UTC Time: 9/20/2026, 14:50
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Aeronautical Observation: Automated synoptic observations via NWS Gateway.
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Lyon School, SD Regional Weather

Expires:202609201500;;767428
ASUS43 KFSD 201410
RWRFSD

WEATHER ROUNDUP FOR SE SOUTH DAKOTA/SW MINNESOTA/NW IOWA
NATIONAL WEATHER SERVICE SIOUX FALLS SD
900 AM CDT SUN SEP 20 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>070-201500-
SOUTHEAST SOUTH DAKOTA
  
CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
BROOKINGS      CLOUDY    57  53  86 NE14      30.15R TC  14           
CHAMBERLAIN    CLOUDY    58  56  94 E7        30.15S TC  14           
HURON          PTSUNNY   60  56  86 NE9       30.14R TC  16           
MADISON        CLOUDY    57  57 100 NE14G20   30.12R TC  14           
MITCHELL       CLOUDY    59  54  83 NE9       30.14R TC  15           
SIOUX FALLS    CLOUDY    57  54  89 NE15      30.11R TC  14           
WINNER         CLOUDY    58  57  97 NE6       30.12S FOG     TC  14   
YANKTON        CLOUDY    59  58  96 NE10      30.09R TC  15           
$$


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

Lyon School, SD

Today
Rain Showers
58°/ 50° 14°/ 10°
100%
Monday
Rain Showers
58°/ 45° 14°/
70%
Tuesday
Partly Cloudy
62°/ 48° 17°/
0%
Wednesday
Partly Cloudy
65°/ 52° 18°/ 11°
40%
Thursday
Partly Cloudy
72°/ 52° 22°/ 11°
0%
Friday
Mostly Cloudy
72°/ 55° 22°/ 13°
0%
Saturday
Mostly Cloudy
75°24°
0%

Day: Cloudy. Patchy fog this morning. A chance of showers with patchy drizzle this morning, then showers likely this afternoon. Near steady temperature in the upper 50s. Northeast winds 5 to 10 mph with gusts up to 20 mph. Chance of rain 70 percent.

Night: Showers. Lows around 50. East winds around 10 mph with gusts up to 20 mph. Chance of rain near 100 percent.

Fort Thompson, SD

Today
Rain Showers
62°/ 50° 17°/ 10°
100%
Monday
Rain Showers
58°/ 42° 14°/
50%
Tuesday
Partly Cloudy
62°/ 48° 17°/
0%
Wednesday
Rain Showers
65°/ 52° 18°/ 11°
40%
Thursday
Partly Cloudy
72°/ 52° 22°/ 11°
0%
Friday
Rain Showers
72°/ 55° 22°/ 13°
20%

Day: Cloudy. A chance of showers this morning, then showers likely this afternoon. Patchy fog this afternoon. Highs in the lower 60s. Northeast winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 70 percent.

Night: Showers. Patchy fog. Lows around 50. East winds around 10 mph. Chance of rain near 100 percent.

Plankinton, SD

Today
Rain Showers
58°/ 52° 14°/ 11°
100%
Monday
Rain Showers
58°/ 45° 14°/
50%
Tuesday
Partly Cloudy
62°/ 48° 17°/
0%
Wednesday
Mostly Cloudy
65°/ 52° 18°/ 11°
50%
Thursday
Mostly Cloudy
72°/ 52° 22°/ 11°
0%
Friday
Mostly Cloudy
72°/ 55° 22°/ 13°
0%
Saturday
Mostly Cloudy
72°22°
0%

Day: Cloudy. A chance of showers with patchy drizzle this morning, then showers likely this afternoon. Near steady temperature in the upper 50s. Northeast winds 10 to 15 mph. Chance of rain 70 percent.

Night: Showers. Lows in the lower 50s. Northeast winds around 10 mph with gusts up to 20 mph. Chance of rain near 100 percent.

Kennebec, SD

Today
Rain Showers
62°/ 50° 17°/ 10°
100%
Monday
Rain Showers
60°/ 45° 16°/
70%
Tuesday
Mostly Cloudy
65°/ 48° 18°/
20%
Wed Night
Thunderstorms
52°11°
40%
Thu-Thu Night
Cloudy
75°24°
0%
Friday
Mostly Cloudy
78°26°
0%
Saturday
Mostly Cloudy
78°26°
0%

Day: A chance of showers this morning, then showers this afternoon. Patchy fog. Highs in the lower 60s. East winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 90 percent.

Night: Showers. Patchy fog. Lows around 50. East winds 10 to 15 mph with gusts up to 25 mph. Chance of rain near 100 percent.

Wessington Springs, SD

Today
Rain Showers
62°/ 52° 17°/ 11°
90%
Monday
Rain Showers
58°/ 45° 14°/
50%
Tuesday
Partly Cloudy
62°/ 48° 17°/
0%
Wednesday
Partly Cloudy
65°/ 52° 18°/ 11°
40%
Thursday
Mostly Cloudy
72°/ 52° 22°/ 11°
0%
Friday
Mostly Cloudy
72°/ 55° 22°/ 13°
0%
Saturday
Mostly Cloudy
72°22°
0%

Day: Cloudy. A slight chance of showers this morning, then a chance of showers this afternoon. Highs in the lower 60s. Northeast winds 10 to 15 mph. Chance of rain 50 percent.

Night: Showers. Lows in the lower 50s. Northeast winds 5 to 10 mph. Chance of rain 90 percent.

Miller, SD

Today
Rain Showers
62°/ 48° 17°/
70%
Monday
Rain Showers
60°/ 42° 16°/
50%
Tuesday
Partly Cloudy
62°/ 45° 17°/
0%
Wednesday
Rain Showers
65°/ 52° 18°/ 11°
40%
Thursday
Partly Cloudy
72°/ 52° 22°/ 11°
0%
Friday
Mostly Cloudy
72°22°
0%
Saturday
Mostly Cloudy
72°22°
0%

Day: Cloudy. A chance of showers this afternoon. Highs in the lower 60s. Northeast winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 50 percent.

Night: Showers likely. Patchy fog. Lows in the upper 40s. Northeast winds 10 to 15 mph. Chance of rain 70 percent.

Wagner, SD

Today
Rain Showers
58°/ 52° 14°/ 11°
100%
Monday
Thunderstorms
58°/ 45° 14°/
80%
Tuesday
Mostly Cloudy
62°/ 48° 17°/
0%
Wednesday
Partly Cloudy
65°/ 52° 18°/ 11°
50%
Thursday
Mostly Cloudy
72°/ 55° 22°/ 13°
0%
Friday
Mostly Cloudy
72°/ 55° 22°/ 13°
0%
Saturday
Mostly Cloudy
72°22°
0%

Day: Cloudy. Patchy fog this morning. A chance of showers with patchy drizzle this morning, then showers this afternoon. Near steady temperature in the upper 50s. Northeast winds 5 to 10 mph with gusts up to 20 mph. Chance of rain 80 percent.

Night: Showers. A slight chance of thunderstorms after midnight. Lows in the lower 50s. Northeast winds 5 to 10 mph. Chance of rain near 100 percent.

Highmore, SD

Today
Rain Showers
62°/ 48° 17°/
100%
Monday
Rain Showers
60°/ 42° 16°/
50%
Tuesday
Partly Cloudy
62°/ 48° 17°/
0%
Wednesday
Rain Showers
65°/ 52° 18°/ 11°
40%
Thursday
Partly Cloudy
75°/ 52° 24°/ 11°
0%
Friday
Mostly Cloudy
75°24°
0%
Saturday
Mostly Cloudy
75°24°
0%

Day: Cloudy. A slight chance of showers this morning, then showers likely this afternoon. Patchy fog this afternoon. Highs in the lower 60s. East winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 70 percent.

Night: Showers. Patchy fog. Lows in the upper 40s. East winds 10 to 15 mph with gusts up to 25 mph. Chance of rain near 100 percent.

Armour, SD

Today
Rain Showers
58°/ 52° 14°/ 11°
100%
Monday
Rain Showers
58°/ 45° 14°/
80%
Tuesday
Mostly Cloudy
62°/ 48° 17°/
0%
Wednesday
Partly Cloudy
65°/ 52° 18°/ 11°
50%
Thursday
Mostly Cloudy
72°/ 52° 22°/ 11°
0%
Friday
Mostly Cloudy
72°/ 55° 22°/ 13°
0%
Saturday
Mostly Cloudy
72°22°
0%

Day: Cloudy. A chance of showers with patchy drizzle this morning, then showers this afternoon. Near steady temperature in the upper 50s. Northeast winds around 10 mph with gusts up to 20 mph. Chance of rain 80 percent.

Night: Showers in the evening, then showers with a slight chance of thunderstorms after midnight. Lows in the lower 50s. Northeast winds around 10 mph. Chance of rain near 100 percent.

Woonsocket, SD

Today
Rain Showers
65°/ 52° 18°/ 11°
90%
Monday
Rain Showers
60°/ 45° 16°/
50%
Tuesday
Sunny
65°/ 45° 18°/
0%
Wednesday
Partly Cloudy
65°/ 50° 18°/ 10°
50%
Thursday
Mostly Cloudy
72°/ 52° 22°/ 11°
0%
Friday
Mostly Cloudy
72°/ 55° 22°/ 13°
0%
Saturday
Mostly Cloudy
72°22°
0%

Day: Cloudy. Patchy drizzle this morning, then a chance of showers this afternoon. Highs in the mid 60s. Northeast winds 10 to 15 mph. Chance of rain 50 percent.

Night: Showers. Lows in the lower 50s. Northeast winds 5 to 10 mph. Chance of rain 90 percent.

Mitchell, SD

Today
Rain Showers
62°/ 52° 17°/ 11°
100%
Monday
Rain Showers
60°/ 45° 16°/
70%
Tuesday
Partly Cloudy
65°/ 45° 18°/
0%
Wednesday
Partly Cloudy
65°/ 52° 18°/ 11°
50%
Thursday
Mostly Cloudy
72°/ 52° 22°/ 11°
0%
Friday
Mostly Cloudy
72°/ 55° 22°/ 13°
0%
Saturday
Mostly Cloudy
75°24°
0%

Day: Cloudy. A slight chance of showers with patchy drizzle this morning, then showers likely this afternoon. Highs in the lower 60s. Northeast winds 5 to 10 mph with gusts up to 20 mph. Chance of rain 70 percent.

Night: Showers. Lows in the lower 50s. Northeast winds around 10 mph. Chance of rain near 100 percent.

Huron, SD

Today
Rain Showers
65°/ 50° 18°/ 10°
70%
Monday
Rain Showers
60°/ 42° 16°/
50%
Tuesday
Sunny
65°/ 45° 18°/
0%
Wednesday
Partly Cloudy
65°/ 50° 18°/ 10°
50%
Thursday
Mostly Cloudy
72°/ 52° 22°/ 11°
0%
Friday
Mostly Cloudy
72°/ 55° 22°/ 13°
0%
Saturday
Mostly Cloudy
72°22°
0%

Day: Cloudy. Patchy drizzle this morning, then a slight chance of showers this afternoon. Highs in the mid 60s. Northeast winds around 10 mph with gusts up to 20 mph. Chance of rain 20 percent.

Night: A chance of showers in the evening, then showers likely after midnight. Lows around 50. Northeast winds 5 to 10 mph. Chance of rain 70 percent.

Gregory, SD

Today
Rain Showers
58°/ 52° 14°/ 11°
100%
Monday
Rain Showers
58°/ 45° 14°/
90%
Tuesday
Mostly Cloudy
62°/ 48° 17°/
20%
Wednesday
Mostly Cloudy
65°/ 52° 18°/ 11°
50%
Thursday
Partly Cloudy
72°/ 55° 22°/ 13°
0%
Friday
Mostly Cloudy
72°/ 55° 22°/ 13°
0%
Saturday
Mostly Cloudy
72°22°
0%

Day: Showers. Patchy fog. Near steady temperature in the upper 50s. Northeast winds 5 to 10 mph with gusts up to 20 mph. Chance of rain 90 percent.

Night: Showers with a slight chance of thunderstorms. Lows in the lower 50s. Northeast winds around 10 mph with gusts up to 20 mph. Chance of rain near 100 percent.

Alexandria, SD

Today
Rain Showers
65°/ 52° 18°/ 11°
100%
Monday
Rain Showers
60°/ 45° 16°/
70%
Tuesday
Partly Cloudy
65°/ 45° 18°/
0%
Wednesday
Partly Cloudy
68°/ 52° 20°/ 11°
50%
Thursday
Mostly Cloudy
72°/ 52° 22°/ 11°
0%
Friday
Mostly Cloudy
72°/ 55° 22°/ 13°
0%
Saturday
Mostly Cloudy
72°22°
0%

Day: Cloudy. A slight chance of showers with patchy drizzle this morning, then a chance of showers this afternoon. Highs in the mid 60s. Northeast winds 5 to 10 mph with gusts up to 20 mph. Chance of rain 50 percent.

Night: Showers. Lows in the lower 50s. Northeast winds 5 to 10 mph. Chance of rain near 100 percent.

Pierre, SD

Today
Rain Showers
62°/ 50° 17°/ 10°
100%
Monday
Rain Showers
62°/ 45° 17°/
50%
Tuesday
Partly Cloudy
65°/ 48° 18°/
0%
Wednesday
Rain Showers
68°/ 52° 20°/ 11°
40%
Thu-Thu Night
Cloudy
75°24°
0%
Friday
Mostly Cloudy
78°26°
0%
Saturday
Mostly Cloudy
78°26°
0%

Day: Cloudy. A chance of showers this morning, then showers this afternoon. Patchy fog this afternoon. Highs in the lower 60s. East winds 10 to 15 mph with gusts up to 30 mph. Chance of rain 90 percent.

Night: Showers. Patchy fog. Lows around 50. East winds 10 to 15 mph. Chance of rain near 100 percent.

Parkston, SD

Today
Rain Showers
62°/ 52° 17°/ 11°
100%
Monday
Rain Showers
58°/ 45° 14°/
80%
Tuesday
Mostly Cloudy
62°/ 45° 17°/
0%
Wednesday
Partly Cloudy
65°/ 52° 18°/ 11°
50%
Thursday
Mostly Cloudy
72°/ 52° 22°/ 11°
0%
Friday
Mostly Cloudy
72°/ 55° 22°/ 13°
0%
Saturday
Mostly Cloudy
72°22°
0%

Day: Cloudy. A slight chance of showers with patchy drizzle this morning, then showers likely this afternoon. Highs in the lower 60s. Northeast winds 5 to 10 mph with gusts up to 20 mph. Chance of rain 70 percent.

Night: Showers. A slight chance of thunderstorms after midnight. Lows in the lower 50s. Northeast winds 5 to 10 mph with gusts up to 20 mph. Chance of rain near 100 percent.

Howard, SD

Today
Rain Showers
65°/ 50° 18°/ 10°
90%
Monday
Rain Showers
58°/ 42° 14°/
20%
Tuesday
Sunny
65°/ 45° 18°/
0%
Wednesday
Partly Cloudy
65°/ 48° 18°/
50%
Thursday
Mostly Cloudy
70°/ 52° 21°/ 11°
0%
Friday
Mostly Cloudy
72°/ 55° 22°/ 13°
0%
Saturday
Mostly Cloudy
72°22°
0%

Day: Cloudy. Patchy drizzle this morning, then a chance of showers this afternoon. Highs in the mid 60s. Northeast winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 40 percent.

Night: Showers. Lows around 50. Northeast winds around 10 mph with gusts up to 20 mph. Chance of rain 90 percent.

Redfield, SD

Today
Rain Showers
65°/ 48° 18°/
50%
Monday
Rain Showers
62°/ 42° 17°/
20%
Tuesday
Partly Cloudy
65°/ 45° 18°/
0%
Wednesday
Rain Showers
68°/ 50° 20°/ 10°
50%
Thursday
Rain Showers
72°/ 55° 22°/ 13°
20%
Fri Night
Mostly Cloudy
55°13°
0%
Saturday
Rain Showers
72°22°
20%

Day: Mostly cloudy. A slight chance of showers this afternoon. Highs in the mid 60s. Northeast winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 20 percent.

Night: Cloudy with a 50 percent chance of showers. Lows in the upper 40s. Northeast winds 5 to 10 mph.

De Smet, SD

Today
Rain Showers
65°/ 48° 18°/
70%
Monday
Rain Showers
58°/ 42° 14°/
50%
Tuesday
Sunny
62°/ 45° 17°/
0%
Wednesday
Sunny
65°/ 48° 18°/
50%
Thursday
Mostly Cloudy
68°/ 52° 20°/ 11°
0%
Friday
Mostly Cloudy
72°/ 55° 22°/ 13°
0%
Saturday
Mostly Cloudy
72°22°
0%

Day: Cloudy. Patchy drizzle this morning, then a slight chance of showers this afternoon. Highs in the mid 60s. Northeast winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 20 percent.

Night: Cloudy. A chance of showers in the evening, then showers likely after midnight. Lows in the upper 40s. East winds 10 to 15 mph. Chance of rain 70 percent.

Faulkton, SD

Today
Rain Showers
65°/ 48° 18°/
70%
Monday
Rain Showers
62°/ 42° 17°/
20%
Tuesday
Partly Cloudy
65°/ 45° 18°/
0%
Wednesday
Rain Showers
68°/ 50° 20°/ 10°
40%
Thursday
Partly Cloudy
72°/ 52° 22°/ 11°
0%
Friday
Mostly Cloudy
72°22°
0%
Saturday
Mostly Cloudy
72°22°
0%

Day: Cloudy. Patchy fog this morning. A slight chance of very light drizzle this morning, then a slight chance of showers this afternoon. Highs in the mid 60s. Northeast winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 20 percent.

Night: A chance of showers in the evening, then showers likely after midnight. Lows in the upper 40s. Northeast winds 10 to 15 mph. Chance of rain 70 percent.

Names listed above may include county names.

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