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Sioux Falls, South Dakota weather · now

84°

Mostly Clear

Feels
90°
High / Low
85° / 68°
Wind
0 mph N
Humidity
66%
No precipitation expected in the next 1.6 hours.
GoodAir quality PollenTreeNoneGrassModerateWeedModerate
Sun 6:27 AM 8:36 PM 14h 9m
Moon Waning Crescent 3% lit

Current weather and 7-day forecast for Sioux Falls, South Dakota, sourced directly from the National Weather Service. Expect mostly sunny today. Today's high is 85° with a low near 68°.

What to wear today

T-shirt and shorts weather

85°F today — easy summer dressing.

Next 24 hours

65° 80° 90° ↑ 85° ↓ 68° 11 AM 2 PM 5 PM 8 PM 11 PM 2 AM 5 AM 8 AM

  1. 11 AM

    77°

    0%

  2. 1 PM

    82°

    7%

  3. 3 PM

    84°

    5%

  4. 5 PM

    84°

    3%

  5. 7 PM

    83°

    2%

  6. 9 PM

    79°

    4%

  7. 11 PM

    76°

    5%

  8. 1 AM

    72°

    21%

  9. 3 AM

    71°

    11%

  10. 5 AM

    69°

    8%

  11. 7 AM

    68°

    7%

  12. 9 AM

    71°

    0%

Live radar

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7 days

  1. Today 8/11 Mostly Sunny 21% 85° · 68°
    1. 11 AM 77° Partly Sunny
    2. 12 PM 80° Partly Sunny 4%
    3. 1 PM 82° Mostly Sunny 7%
    4. 2 PM 84° Mostly Sunny 7%
    5. 3 PM 84° Mostly Sunny 5%
    6. 4 PM 85° Mostly Sunny 6%
    7. 5 PM 84° Mostly Sunny 3%
    8. 6 PM 84° Partly Cloudy
    9. 7 PM 83° Partly Cloudy 2%
    10. 8 PM 83° Partly Cloudy 3%
    11. 9 PM 79° Partly Cloudy 4%
    12. 10 PM 77° Partly Cloudy 5%
    13. 11 PM 76° Partly Cloudy 5%
  2. Wed 8/12 Partly Sunny then Patchy Smoke 49% 86° · 67°
    1. 12 AM 73° Mostly Cloudy 13%
    2. 1 AM 72° Slight Chance Showers And Thunderstorms 21%
    3. 2 AM 72° Slight Chance Showers And Thunderstorms 16%
    4. 3 AM 71° Mostly Cloudy 11%
    5. 4 AM 70° Mostly Cloudy 9%
    6. 5 AM 69° Mostly Cloudy 8%
    7. 6 AM 68° Mostly Cloudy 8%
    8. 7 AM 68° Cloudy 7%
    9. 8 AM 70° Mostly Cloudy 8%
    10. 9 AM 71° Mostly Cloudy
    11. 10 AM 75° Mostly Cloudy
    12. 11 AM 77° Partly Sunny
    13. 12 PM 79° Patchy Smoke
    14. 1 PM 82° Patchy Smoke
    15. 2 PM 83° Patchy Smoke
    16. 3 PM 84° Patchy Smoke 1%
    17. 4 PM 84° Mostly Sunny 2%
    18. 5 PM 85° Mostly Sunny 9%
    19. 6 PM 84° Slight Chance Rain Showers 22%
    20. 7 PM 83° Chance Showers And Thunderstorms 29%
    21. 8 PM 81° Chance Showers And Thunderstorms 29%
    22. 9 PM 78° Chance Showers And Thunderstorms 29%
    23. 10 PM 76° Chance Showers And Thunderstorms 29%
    24. 11 PM 75° Chance Showers And Thunderstorms 29%
  3. Thu 8/13 Chance Rain Showers 49% 77° · 63°
    1. 12 AM 73° Chance Showers And Thunderstorms 29%
    2. 1 AM 71° Chance Rain Showers 49%
    3. 2 AM 70° Chance Rain Showers 49%
    4. 3 AM 69° Chance Rain Showers 49%
    5. 4 AM 69° Chance Rain Showers 49%
    6. 5 AM 68° Chance Rain Showers 49%
    7. 6 AM 67° Chance Rain Showers 49%
    8. 7 AM 67° Chance Rain Showers 33%
    9. 8 AM 68° Chance Rain Showers 33%
    10. 9 AM 69° Chance Rain Showers 33%
    11. 10 AM 70° Chance Rain Showers 33%
    12. 11 AM 71° Chance Rain Showers 33%
    13. 12 PM 73° Chance Rain Showers 33%
    14. 1 PM 74° Mostly Cloudy 8%
    15. 2 PM 76° Mostly Cloudy 8%
    16. 3 PM 76° Mostly Cloudy 8%
    17. 4 PM 77° Mostly Cloudy 8%
    18. 5 PM 76° Partly Sunny 8%
    19. 6 PM 76° Mostly Cloudy 8%
    20. 7 PM 75° Mostly Cloudy 10%
    21. 8 PM 73° Mostly Cloudy 10%
    22. 9 PM 72° Mostly Cloudy 10%
    23. 10 PM 70° Mostly Cloudy 10%
    24. 11 PM 69° Mostly Cloudy 10%
  4. Fri 8/14 Chance Showers And Thunderstorms 64% 75° · 64°
    1. 12 AM 68° Mostly Cloudy 10%
    2. 1 AM 67° Chance Showers And Thunderstorms 25%
    3. 2 AM 66° Chance Showers And Thunderstorms 25%
    4. 3 AM 65° Chance Showers And Thunderstorms 25%
    5. 4 AM 65° Chance Showers And Thunderstorms 25%
    6. 5 AM 64° Chance Showers And Thunderstorms 25%
    7. 6 AM 63° Chance Showers And Thunderstorms 25%
    8. 7 AM 63° Chance Showers And Thunderstorms 50%
    9. 8 AM 65° Chance Showers And Thunderstorms 50%
    10. 9 AM 66° Chance Showers And Thunderstorms 50%
    11. 10 AM 68° Chance Showers And Thunderstorms 50%
    12. 11 AM 69° Chance Showers And Thunderstorms 50%
    13. 12 PM 71° Chance Showers And Thunderstorms 50%
    14. 1 PM 72° Chance Showers And Thunderstorms 52%
    15. 2 PM 73° Chance Showers And Thunderstorms 52%
    16. 3 PM 74° Chance Showers And Thunderstorms 52%
    17. 4 PM 74° Chance Showers And Thunderstorms 52%
    18. 5 PM 74° Chance Showers And Thunderstorms 52%
    19. 6 PM 73° Chance Showers And Thunderstorms 52%
    20. 7 PM 71° Chance Showers And Thunderstorms 50%
    21. 8 PM 70° Chance Showers And Thunderstorms 50%
    22. 9 PM 69° Chance Showers And Thunderstorms 50%
    23. 10 PM 68° Chance Showers And Thunderstorms 50%
    24. 11 PM 68° Chance Showers And Thunderstorms 50%
  5. Sat 8/15 Showers And Thunderstorms Likely 64% 77° · 62°
    1. 12 AM 68° Chance Showers And Thunderstorms 50%
    2. 1 AM 68° Showers And Thunderstorms Likely 64%
    3. 2 AM 67° Showers And Thunderstorms Likely 64%
    4. 3 AM 67° Showers And Thunderstorms Likely 64%
    5. 4 AM 66° Showers And Thunderstorms Likely 64%
    6. 5 AM 65° Showers And Thunderstorms Likely 64%
    7. 6 AM 65° Showers And Thunderstorms Likely 64%
    8. 7 AM 65° Chance Showers And Thunderstorms 36%
    9. 8 AM 66° Chance Showers And Thunderstorms 36%
    10. 9 AM 68° Chance Showers And Thunderstorms 36%
    11. 10 AM 70° Chance Showers And Thunderstorms 36%
    12. 11 AM 71° Chance Showers And Thunderstorms 36%
    13. 12 PM 72° Chance Showers And Thunderstorms 36%
    14. 1 PM 73° Chance Showers And Thunderstorms 35%
    15. 2 PM 74° Chance Showers And Thunderstorms 35%
    16. 3 PM 75° Chance Showers And Thunderstorms 35%
    17. 4 PM 76° Chance Showers And Thunderstorms 35%
    18. 5 PM 76° Chance Showers And Thunderstorms 35%
    19. 6 PM 76° Chance Showers And Thunderstorms 35%
    20. 7 PM 75° Chance Showers And Thunderstorms 35%
    21. 8 PM 74° Chance Showers And Thunderstorms 35%
    22. 9 PM 72° Chance Showers And Thunderstorms 35%
    23. 10 PM 70° Chance Showers And Thunderstorms 35%
    24. 11 PM 69° Chance Showers And Thunderstorms 35%
  6. Sun 8/16 Chance Rain Showers then Partly Sunny 25% 75° · 59°
    1. 12 AM 68° Chance Showers And Thunderstorms 35%
    2. 1 AM 67° Chance Rain Showers 25%
    3. 2 AM 66° Chance Rain Showers 25%
    4. 3 AM 65° Chance Rain Showers 25%
    5. 4 AM 64° Chance Rain Showers 25%
    6. 5 AM 63° Chance Rain Showers 25%
    7. 6 AM 63° Chance Rain Showers 25%
    8. 7 AM 63° Mostly Cloudy 10%
    9. 8 AM 64° Mostly Cloudy 10%
    10. 9 AM 65° Mostly Cloudy 10%
    11. 10 AM 67° Mostly Cloudy 10%
    12. 11 AM 69° Mostly Cloudy 10%
    13. 12 PM 71° Mostly Cloudy 10%
    14. 1 PM 72° Mostly Sunny 5%
    15. 2 PM 73° Mostly Sunny 5%
    16. 3 PM 74° Mostly Sunny 5%
    17. 4 PM 74° Mostly Sunny 5%
    18. 5 PM 75° Mostly Sunny 5%
    19. 6 PM 75° Partly Cloudy 5%
    20. 7 PM 74° Partly Cloudy 13%
    21. 8 PM 72° Partly Cloudy 13%
    22. 9 PM 69° Partly Cloudy 13%
    23. 10 PM 66° Partly Cloudy 13%
    24. 11 PM 64° Partly Cloudy 13%
  7. Mon 8/17 Slight Chance Rain Showers then Partly Sunny 33% 77° · 62°
    1. 12 AM 63° Partly Cloudy 13%
    2. 1 AM 62° Slight Chance Rain Showers 15%
    3. 2 AM 61° Slight Chance Rain Showers 15%
    4. 3 AM 60° Slight Chance Rain Showers 15%
    5. 4 AM 60° Slight Chance Rain Showers 15%
    6. 5 AM 59° Slight Chance Rain Showers 15%
    7. 6 AM 59° Slight Chance Rain Showers 15%
    8. 7 AM 60° Mostly Cloudy 12%
    9. 8 AM 62° Mostly Cloudy 12%
    10. 9 AM 64° Mostly Cloudy 12%
    11. 10 AM 67° Mostly Cloudy 12%
    12. 11 AM 70° Mostly Cloudy 12%
    13. 12 PM 72° Mostly Cloudy 12%
    14. 1 PM 74° Mostly Sunny 7%
    15. 2 PM 75° Mostly Sunny 7%
    16. 3 PM 76° Mostly Sunny 7%
    17. 4 PM 76° Mostly Sunny 7%
    18. 5 PM 76° Mostly Sunny 7%
    19. 6 PM 76° Partly Cloudy 7%
    20. 7 PM 75° Slight Chance Showers And Thunderstorms 16%
    21. 8 PM 73° Slight Chance Showers And Thunderstorms 16%
    22. 9 PM 70° Slight Chance Showers And Thunderstorms 16%
    23. 10 PM 68° Slight Chance Showers And Thunderstorms 16%
Extended outlook days 8–16
  1. Tue 8/18 Cloudy 24% 94° · 62°
  2. Wed 8/19 Drizzle 15% 94° · 61°
  3. Thu 8/20 Drizzle 12% 107° · 63°
  4. Fri 8/21 Cloudy 11% 78° · 66°
  5. Sat 8/22 Cloudy 17% 82° · 51°
  6. Sun 8/23 Cloudy 19% 73° · 57°
  7. Mon 8/24 Drizzle 29% 72° · 56°
  8. Tue 8/25 Partly Cloudy 23% 93° · 61°
  9. Wed 8/26 Partly Cloudy 16% 103° · 62°

Days 8+ from the Open-Meteo multi-model ensemble — treat as a guide; accuracy drops past day 7.

Best day this week

Mild temps, low rain chance, clearer skies.

Wednesday, 8/12

Partly Sunny then Patchy Smoke, 86° / 67°, 49% rain

  1. Tomorrow86°67°
  2. Thu77°63°
  3. Fri75°64°
  4. Sat77°62°
  5. Sun75°59°
  6. Mon77°62°

Best time to head outside

Picks the upcoming daytime hour with the most favorable conditions for each activity. Factors in temperature, wind, precipitation timing, and pollen.

How well did we do?

Average miss by lead time.

Each morning we save the day's predicted high/low. As later days arrive, we grade what we said against what the station actually recorded.

Same day
±2°
2 days graded
1 day out
±2°
2 days graded
3 days out
±2°
2 days graded
7 days out
±7°
2 days graded
Day-by-day, 1 day out6 days
  1. Yesterday±3°
    High85°88°-3°
    Low67°66°+1°
  2. Sun, Aug 9±1°
    High85°86°-1°
    Low67°66°+1°
  3. Sat, Aug 8pending
    High86°——
    Low67°——
  4. Fri, Aug 7pending
    High85°——
    Low59°——
  5. Thu, Aug 6pending
    High83°——
    Low66°——
  6. Tue, Aug 4pending
    High75°——
    Low56°——

Climate normals

What weather to expect in Sioux Falls

Sioux Falls in August typically averages 80° highs and 63° lows, with about 15 days of rain. The hottest stretch is July (average high 85°); the coldest is January (average low 10°). June is the wettest month on average.

MonthAvg highAvg lowRainy days
Jan27°10°6
Feb34°15°5
Mar51°29°10
Apr59°38°14
May71°50°11
Jun80°61°18
Jul85°66°18
Aug80°63°15
Sep78°58°7
Oct65°47°8
Nov45°30°9
Dec33°17°10

Normals derived from the past two years of observations via Open-Meteo's historical archive.

More for Sioux Falls

Detailed forecast (NWS)

Today
Mostly sunny, with a high near 85. East northeast wind around 5 mph.
Wednesday
Patchy smoke between noon and 4pm. Partly sunny, with a high near 86. East wind around 5 mph. New rainfall amounts less than a tenth of an inch possible.
Thursday
A chance of rain showers before 1pm. Mostly cloudy, with a high near 77. East northeast wind 5 to 10 mph, with gusts as high as 25 mph. Chance of precipitation is 50%.
Friday
A chance of showers and thunderstorms before 1pm, then a chance of showers and thunderstorms. Cloudy, with a high near 75. Chance of precipitation is 50%.

Forecast details

NWS gridpoint
FSD 98,64
Radar station
KFSD
Time zone
America/Chicago
Coordinates
43.545, -96.731