Foster, SD Weather Forecast & Current Conditions

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Foster Weather Map
UTC Time: 9/18/2026, 00:10
Your Time:
Aeronautical Observation: Automated synoptic observations via NWS Gateway.
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Foster, SD Regional Weather

Expires:202609180100;;627950
ASUS43 KFSD 180002
RWRSD 

WEATHER ROUNDUP FOR SOUTH DAKOTA
NATIONAL WEATHER SERVICE SIOUX FALLS SD
700 PM CDT THU SEP 17 2026

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



SDZ004>011-016>023-039-040-180100-
NORTHEAST SOUTH DAKOTA
  
CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
ABERDEEN       CLOUDY    67  58  72 SE7       30.25S TC  19           
WATERTOWN      MOCLDY    64  56  75 CALM      30.28R TC  18           
BROOKINGS      CLOUDY    66  58  75 E10       30.28R TC  19           
SISSETON         N/A     67  57  70 E5        30.25F TC  19           
$$
 

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

Foster, SD

Tonight
Thunderstorms
55°13°
90%
Friday
Rain Showers
65°/ 52° 18°/ 11°
70%
Saturday
Cloudy
65°/ 52° 18°/ 11°
0%
Sun-Sun Night
Rain Showers
65°18°
50%
Monday
Rain Showers
62°/ 48° 17°/
50%
Tue Night
Rain Showers
52°11°
20%
Wednesday
Rain Showers
72°/ 55° 22°/ 13°
40%
Thursday
Partly Cloudy
75°24°
0%

Night: Cloudy. A slight chance of showers this evening, then showers with a slight chance of thunderstorms after midnight. Lows in the mid 50s. East winds 15 to 20 mph with gusts up to 30 mph. Chance of rain 90 percent.

McIntosh, SD

Tonight
Rain Showers
55°13°
90%
Friday
Rain Showers
68°/ 52° 20°/ 11°
70%
Saturday
Rain Showers
65°/ 52° 18°/ 11°
50%
Sunday
Rain Showers
65°/ 52° 18°/ 11°
70%
Monday
Rain Showers
65°/ 50° 18°/ 10°
20%
Tuesday
Rain Showers
70°/ 52° 21°/ 11°
40%
Wed Night
Thunderstorms
55°13°
20%
Thursday
Partly Cloudy
78°26°
0%

Night: Cloudy. A chance of showers this evening, then showers after midnight. Not as cool with lows in the mid 50s. East winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 90 percent.

Isabel, SD

Tonight
Thunderstorms
58°14°
100%
Friday
Rain Showers
68°/ 52° 20°/ 11°
70%
Saturday
Rain Showers
65°/ 52° 18°/ 11°
40%
Sun-Sun Night
Rain Showers
65°18°
70%
Monday
Rain Showers
65°/ 50° 18°/ 10°
50%
Tuesday
Rain Showers
70°/ 52° 21°/ 11°
40%
Wednesday
Rain Showers
75°/ 55° 24°/ 13°
40%
Thursday
Partly Cloudy
78°26°
0%

Night: A chance of showers this evening, then showers with a slight chance of thunderstorms after midnight. Lows in the upper 50s. East winds 15 to 20 mph with gusts up to 30 mph. Chance of rain near 100 percent.

Herreid, SD

Tonight
Rain Showers
55°13°
90%
Friday
Rain Showers
65°/ 52° 18°/ 11°
70%
Saturday
Rain Showers
68°/ 52° 20°/ 11°
20%
Sunday
Rain Showers
65°/ 50° 18°/ 10°
50%
Monday
Rain Showers
65°/ 48° 18°/
20%
Tue Night
Rain Showers
52°11°
20%
Wednesday
Rain Showers
72°/ 52° 22°/ 11°
40%
Thursday
Partly Cloudy
75°24°
0%

Night: Cloudy. Showers after midnight. Not as cool with lows in the mid 50s. East winds 15 to 20 mph. Chance of rain 90 percent.

Gettysburg, SD

Tonight
Thunderstorms
55°13°
100%
Friday
Thunderstorms
65°/ 52° 18°/ 11°
70%
Saturday
Cloudy
65°/ 52° 18°/ 11°
20%
Sunday
Rain Showers
65°/ 52° 18°/ 11°
70%
Monday
Rain Showers
62°/ 48° 17°/
50%
Tue Night
Rain Showers
52°11°
30%
Wednesday
Rain Showers
72°/ 55° 22°/ 13°
40%
Thursday
Partly Cloudy
75°24°
0%

Night: A chance of showers this evening, then showers with a slight chance of thunderstorms after midnight. Lows in the mid 50s. East winds 15 to 20 mph with gusts up to 30 mph. Chance of rain near 100 percent.

Ipswich, SD

Tonight
Thunderstorms
55°13°
90%
Friday
Rain Showers
65°/ 52° 18°/ 11°
90%
Saturday
Cloudy
65°/ 52° 18°/ 11°
0%
Sunday
Rain Showers
65°/ 52° 18°/ 11°
50%
Monday
Rain Showers
62°/ 48° 17°/
50%
Tue Night
Rain Showers
52°11°
30%
Wednesday
Rain Showers
68°/ 52° 20°/ 11°
40%
Thursday
Partly Cloudy
75°24°
0%

Night: Cloudy. Showers with a slight chance of thunderstorms after midnight. Locally heavy rainfall possible after midnight. Lows in the mid 50s. East winds 15 to 20 mph. Chance of rain 90 percent.

Fort Yates, ND

Today
Mostly Cloudy
75°/ 55° 24°/ 13°
40%
Friday
Rain Showers
68°/ 52° 20°/ 11°
40%
Saturday
Rain Showers
68°/ 52° 20°/ 11°
20%
Sunday
Rain Showers
65°/ 52° 18°/ 11°
40%
Monday
Mostly Cloudy
68°/ 52° 20°/ 11°
0%
Tuesday
Mostly Cloudy
68°/ 52° 20°/ 11°
30%
Wednesday
Thunderstorms
72°22°
40%

Day: Mostly cloudy. Highs in the mid 70s. Temperature falling into the in the upper 60s late. Southeast winds around 15 mph.

Night: Cloudy. A slight chance of showers in the evening, then a chance of showers after midnight. Lows in the mid 50s. Southeast winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 40 percent.

Linton, ND

Today
Partly Cloudy
72°/ 55° 22°/ 13°
60%
Friday
Rain Showers
68°/ 50° 20°/ 10°
50%
Saturday
Mostly Cloudy
68°/ 50° 20°/ 10°
0%
Sunday
Rain Showers
68°/ 50° 20°/ 10°
30%
Monday
Mostly Cloudy
68°/ 48° 20°/
0%
Tuesday
Partly Cloudy
70°/ 50° 21°/ 10°
30%
Wednesday
Rain Showers
72°22°
40%

Day: Partly sunny. Highs in the lower 70s. Southeast winds around 15 mph.

Night: Cloudy. A slight chance of showers in the evening, then showers likely after midnight. Lows in the mid 50s. Southeast winds 10 to 15 mph. Chance of rain 60 percent.

Ashley, ND

Today
Partly Cloudy
70°/ 55° 21°/ 13°
60%
Friday
Rain Showers
65°/ 52° 18°/ 11°
60%
Saturday
Mostly Cloudy
65°/ 52° 18°/ 11°
0%
Sunday
Rain Showers
65°/ 50° 18°/ 10°
30%
Monday
Partly Cloudy
65°/ 48° 18°/
0%
Tuesday
Partly Cloudy
68°/ 50° 20°/ 10°
30%
Wednesday
Rain Showers
65°18°
40%

Day: Partly sunny. Highs around 70. East winds around 10 mph.

Night: Cloudy. Showers likely after midnight. Lows in the mid 50s. East winds 10 to 20 mph. Chance of rain 60 percent.

Eureka, SD

Tonight
Rain Showers
55°13°
70%
Friday
Rain Showers
65°/ 52° 18°/ 11°
70%
Saturday
Cloudy
65°/ 52° 18°/ 11°
0%
Sunday
Rain Showers
65°/ 52° 18°/ 11°
40%
Monday
Rain Showers
65°/ 48° 18°/
20%
Tue Night
Rain Showers
52°11°
30%
Wednesday
Rain Showers
65°/ 52° 18°/ 11°
40%
Thursday
Partly Cloudy
72°22°
0%

Night: Cloudy. Showers likely after midnight. Lows in the mid 50s. East winds 15 to 20 mph. Chance of rain 70 percent.

Onida, SD

Tonight
Thunderstorms
58°14°
100%
Friday
Thunderstorms
68°/ 55° 20°/ 13°
70%
Saturday
Cloudy
65°/ 52° 18°/ 11°
20%
Sun-Sun Night
Rain Showers
65°18°
70%
Monday
Rain Showers
62°/ 48° 17°/
50%
Tuesday
Rain Showers
68°/ 52° 20°/ 11°
40%
Wed Night
Thunderstorms
55°13°
20%
Thursday
Partly Cloudy
75°24°
0%

Night: A chance of showers this evening, then showers with a chance of thunderstorms after midnight. Locally heavy rainfall possible after midnight. Lows in the upper 50s. East winds 15 to 20 mph with gusts up to 30 mph. Chance of rain near 100 percent.

Faulkton, SD

Tonight
Thunderstorms
55°13°
100%
Friday
Thunderstorms
65°/ 52° 18°/ 11°
100%
Saturday
Rain Showers
65°/ 52° 18°/ 11°
20%
Sunday
Rain Showers
65°/ 52° 18°/ 11°
70%
Monday
Rain Showers
62°/ 48° 17°/
50%
Tue Night
Rain Showers
52°11°
30%
Wednesday
Rain Showers
68°/ 55° 20°/ 13°
40%
Thursday
Partly Cloudy
75°24°
0%

Night: Showers with a slight chance of thunderstorms after midnight. Locally heavy rainfall possible after midnight. Lows in the mid 50s. East winds 15 to 20 mph with gusts up to 30 mph. Chance of rain near 100 percent.

Porcupine, ND

Today
Cloudy
75°/ 55° 24°/ 13°
60%
Friday
Rain Showers
68°/ 52° 20°/ 11°
30%
Saturday
Rain Showers
65°/ 52° 18°/ 11°
20%
Sunday
Rain Showers
62°/ 52° 17°/ 11°
60%
Monday
Rain Showers
65°/ 52° 18°/ 11°
20%
Tuesday
Rain Showers
68°/ 55° 20°/ 13°
20%
Wednesday
Thunderstorms
75°24°
30%

Day: Cloudy. Highs in the mid 70s. Temperature falling into the in the upper 60s late. Southeast winds around 15 mph with gusts up to 25 mph.

Night: Cloudy. A chance of showers in the evening, then showers likely after midnight. Lows in the mid 50s. Southeast winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 60 percent.

Elgin, ND

Today
Mostly Cloudy
72°/ 55° 22°/ 13°
50%
Friday
Rain Showers
70°/ 52° 21°/ 11°
N/A
Saturday
Rain Showers
65°/ 52° 18°/ 11°
40%
Sunday
Rain Showers
62°/ 50° 17°/ 10°
50%
Monday
Rain Showers
68°/ 50° 20°/ 10°
20%
Tuesday
Partly Cloudy
70°/ 52° 21°/ 11°
20%
Wednesday
Thunderstorms
75°24°
20%

Day: Mostly cloudy. Highs in the lower 70s. Southeast winds around 15 mph with gusts up to 25 mph.

Night: Cloudy with a 50 percent chance of showers. Lows in the mid 50s. Southeast winds 10 to 15 mph with gusts up to 25 mph.

Fort Pierre, SD

Tonight
Thunderstorms
58°14°
100%
Friday
Rain Showers
72°/ 55° 22°/ 13°
70%
Saturday
Rain Showers
65°/ 52° 18°/ 11°
50%
Sun-Sun Night
Rain Showers
65°18°
70%
Monday
Rain Showers
65°/ 50° 18°/ 10°
50%
Tuesday
Rain Showers
72°/ 55° 22°/ 13°
40%
Wed Night
Rain Showers
55°13°
20%
Thursday
Partly Cloudy
78°26°
0%

Night: A chance of showers with a slight chance of thunderstorms this evening, then showers with a chance of thunderstorms after midnight. Lows in the upper 50s. East winds 15 to 20 mph with gusts up to 30 mph. Chance of rain near 100 percent.

Mandan, ND

Today
Mostly Cloudy
72°/ 55° 22°/ 13°
40%
Friday
Rain Showers
70°/ 52° 21°/ 11°
N/A
Saturday
Rain Showers
68°/ 52° 20°/ 11°
20%
Sunday
Rain Showers
65°/ 52° 18°/ 11°
30%
Monday
Partly Cloudy
68°/ 50° 20°/ 10°
0%
Tuesday
Partly Cloudy
68°/ 52° 20°/ 11°
20%
Wednesday
Thunderstorms
72°22°
30%

Day: Mostly cloudy. Highs in the lower 70s. Southeast winds around 15 mph with gusts up to 25 mph.

Night: Cloudy. A slight chance of showers in the evening, then a chance of showers after midnight. Lows in the mid 50s. Southeast winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 40 percent.

Napoleon, ND

Today
Partly Cloudy
68°/ 55° 20°/ 13°
40%
Friday
Rain Showers
65°/ 52° 18°/ 11°
30%
Saturday
Mostly Cloudy
68°/ 52° 20°/ 11°
0%
Sunday
Mostly Cloudy
65°/ 50° 18°/ 10°
20%
Monday
Partly Cloudy
68°/ 48° 20°/
0%
Tuesday
Partly Cloudy
68°/ 52° 20°/ 11°
20%
Wednesday
Rain Showers
68°20°
40%

Day: Partly sunny. Highs in the upper 60s. Southeast winds around 15 mph.

Night: Cloudy. A chance of showers after midnight. Lows in the mid 50s. Southeast winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 40 percent.

Pierre, SD

Tonight
Thunderstorms
58°14°
100%
Friday
Thunderstorms
70°/ 55° 21°/ 13°
70%
Saturday
Cloudy
65°/ 52° 18°/ 11°
40%
Sun-Sun Night
Rain Showers
65°18°
70%
Monday
Rain Showers
62°/ 50° 17°/ 10°
50%
Tuesday
Rain Showers
68°/ 52° 20°/ 11°
40%
Wednesday
Rain Showers
72°/ 55° 22°/ 13°
40%
Thursday
Partly Cloudy
78°26°
0%

Night: A chance of showers with a slight chance of thunderstorms this evening, then showers with a chance of thunderstorms after midnight. Locally heavy rainfall possible after midnight. Breezy and not as cool with lows in the upper 50s. East winds 10 to 15 mph with gusts up to 25 mph, increasing to 15 to 25 mph with gusts up to 35 mph after midnight. Chance of rain near 100 percent.

Bismarck, ND

Today
Partly Cloudy
72°/ 55° 22°/ 13°
30%
Friday
Rain Showers
72°/ 52° 22°/ 11°
30%
Saturday
Mostly Cloudy
70°/ 52° 21°/ 11°
20%
Sunday
Rain Showers
65°/ 52° 18°/ 11°
30%
Monday
Partly Cloudy
70°/ 50° 21°/ 10°
0%
Tuesday
Partly Cloudy
72°/ 52° 22°/ 11°
20%
Wednesday
Thunderstorms
72°22°
40%

Day: Partly sunny. Highs in the lower 70s. Southeast winds around 15 mph.

Night: Cloudy. A chance of showers after midnight. Lows in the mid 50s. East winds 10 to 15 mph. Chance of rain 30 percent.

Highmore, SD

Tonight
Thunderstorms
58°14°
100%
Friday
Thunderstorms
68°/ 55° 20°/ 13°
90%
Saturday
Cloudy
62°/ 52° 17°/ 11°
20%
Sunday
Rain Showers
65°/ 52° 18°/ 11°
70%
Monday
Rain Showers
62°/ 48° 17°/
50%
Tuesday
Mostly Cloudy
68°/ 52° 20°/ 11°
40%
Wed Night
Thunderstorms
55°13°
20%
Thursday
Partly Cloudy
75°24°
0%

Night: A chance of showers with a slight chance of thunderstorms this evening, then showers with a chance of thunderstorms after midnight. Locally heavy rainfall possible after midnight. Breezy with lows in the upper 50s. East winds 10 to 15 mph with gusts up to 25 mph, increasing to 15 to 25 mph with gusts up to 35 mph after midnight. Chance of rain near 100 percent.

Names listed above may include county names.

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