Sioux Falls, South Dakota weather · now
Mostly Clear
- Feels
- 90°
- High / Low
- 85° / 68°
- Wind
- 0 mph N
- Humidity
- 66%
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
-
11 AM
77°
0%
-
1 PM
82°
7%
-
3 PM
84°
5%
-
5 PM
84°
3%
-
7 PM
83°
2%
-
9 PM
79°
4%
-
11 PM
76°
5%
-
1 AM
72°
21%
-
3 AM
71°
11%
-
5 AM
69°
8%
-
7 AM
68°
7%
-
9 AM
71°
0%
Live radar
View full radar →7 days
-
Today 8/11
Mostly Sunny 21% 85° · 68° - 11 AM
77° Partly Sunny - 12 PM
80° Partly Sunny 4% - 1 PM
82° Mostly Sunny 7% - 2 PM
84° Mostly Sunny 7% - 3 PM
84° Mostly Sunny 5% - 4 PM
85° Mostly Sunny 6% - 5 PM
84° Mostly Sunny 3% - 6 PM
84° Partly Cloudy - 7 PM
83° Partly Cloudy 2% - 8 PM
83° Partly Cloudy 3% - 9 PM
79° Partly Cloudy 4% - 10 PM
77° Partly Cloudy 5% - 11 PM
76° Partly Cloudy 5%
- 11 AM
-
Wed 8/12
Partly Sunny then Patchy Smoke 49% 86° · 67° - 12 AM
73° Mostly Cloudy 13% - 1 AM
72° Slight Chance Showers And Thunderstorms 21% - 2 AM
72° Slight Chance Showers And Thunderstorms 16% - 3 AM
71° Mostly Cloudy 11% - 4 AM
70° Mostly Cloudy 9% - 5 AM
69° Mostly Cloudy 8% - 6 AM
68° Mostly Cloudy 8% - 7 AM
68° Cloudy 7% - 8 AM
70° Mostly Cloudy 8% - 9 AM
71° Mostly Cloudy - 10 AM
75° Mostly Cloudy - 11 AM
77° Partly Sunny - 12 PM
79° Patchy Smoke - 1 PM
82° Patchy Smoke - 2 PM
83° Patchy Smoke - 3 PM
84° Patchy Smoke 1% - 4 PM
84° Mostly Sunny 2% - 5 PM
85° Mostly Sunny 9% - 6 PM
84° Slight Chance Rain Showers 22% - 7 PM
83° Chance Showers And Thunderstorms 29% - 8 PM
81° Chance Showers And Thunderstorms 29% - 9 PM
78° Chance Showers And Thunderstorms 29% - 10 PM
76° Chance Showers And Thunderstorms 29% - 11 PM
75° Chance Showers And Thunderstorms 29%
- 12 AM
-
Thu 8/13
Chance Rain Showers 49% 77° · 63° - 12 AM
73° Chance Showers And Thunderstorms 29% - 1 AM
71° Chance Rain Showers 49% - 2 AM
70° Chance Rain Showers 49% - 3 AM
69° Chance Rain Showers 49% - 4 AM
69° Chance Rain Showers 49% - 5 AM
68° Chance Rain Showers 49% - 6 AM
67° Chance Rain Showers 49% - 7 AM
67° Chance Rain Showers 33% - 8 AM
68° Chance Rain Showers 33% - 9 AM
69° Chance Rain Showers 33% - 10 AM
70° Chance Rain Showers 33% - 11 AM
71° Chance Rain Showers 33% - 12 PM
73° Chance Rain Showers 33% - 1 PM
74° Mostly Cloudy 8% - 2 PM
76° Mostly Cloudy 8% - 3 PM
76° Mostly Cloudy 8% - 4 PM
77° Mostly Cloudy 8% - 5 PM
76° Partly Sunny 8% - 6 PM
76° Mostly Cloudy 8% - 7 PM
75° Mostly Cloudy 10% - 8 PM
73° Mostly Cloudy 10% - 9 PM
72° Mostly Cloudy 10% - 10 PM
70° Mostly Cloudy 10% - 11 PM
69° Mostly Cloudy 10%
- 12 AM
-
Fri 8/14
Chance Showers And Thunderstorms 64% 75° · 64° - 12 AM
68° Mostly Cloudy 10% - 1 AM
67° Chance Showers And Thunderstorms 25% - 2 AM
66° Chance Showers And Thunderstorms 25% - 3 AM
65° Chance Showers And Thunderstorms 25% - 4 AM
65° Chance Showers And Thunderstorms 25% - 5 AM
64° Chance Showers And Thunderstorms 25% - 6 AM
63° Chance Showers And Thunderstorms 25% - 7 AM
63° Chance Showers And Thunderstorms 50% - 8 AM
65° Chance Showers And Thunderstorms 50% - 9 AM
66° Chance Showers And Thunderstorms 50% - 10 AM
68° Chance Showers And Thunderstorms 50% - 11 AM
69° Chance Showers And Thunderstorms 50% - 12 PM
71° Chance Showers And Thunderstorms 50% - 1 PM
72° Chance Showers And Thunderstorms 52% - 2 PM
73° Chance Showers And Thunderstorms 52% - 3 PM
74° Chance Showers And Thunderstorms 52% - 4 PM
74° Chance Showers And Thunderstorms 52% - 5 PM
74° Chance Showers And Thunderstorms 52% - 6 PM
73° Chance Showers And Thunderstorms 52% - 7 PM
71° Chance Showers And Thunderstorms 50% - 8 PM
70° Chance Showers And Thunderstorms 50% - 9 PM
69° Chance Showers And Thunderstorms 50% - 10 PM
68° Chance Showers And Thunderstorms 50% - 11 PM
68° Chance Showers And Thunderstorms 50%
- 12 AM
-
Sat 8/15
Showers And Thunderstorms Likely 64% 77° · 62° - 12 AM
68° Chance Showers And Thunderstorms 50% - 1 AM
68° Showers And Thunderstorms Likely 64% - 2 AM
67° Showers And Thunderstorms Likely 64% - 3 AM
67° Showers And Thunderstorms Likely 64% - 4 AM
66° Showers And Thunderstorms Likely 64% - 5 AM
65° Showers And Thunderstorms Likely 64% - 6 AM
65° Showers And Thunderstorms Likely 64% - 7 AM
65° Chance Showers And Thunderstorms 36% - 8 AM
66° Chance Showers And Thunderstorms 36% - 9 AM
68° Chance Showers And Thunderstorms 36% - 10 AM
70° Chance Showers And Thunderstorms 36% - 11 AM
71° Chance Showers And Thunderstorms 36% - 12 PM
72° Chance Showers And Thunderstorms 36% - 1 PM
73° Chance Showers And Thunderstorms 35% - 2 PM
74° Chance Showers And Thunderstorms 35% - 3 PM
75° Chance Showers And Thunderstorms 35% - 4 PM
76° Chance Showers And Thunderstorms 35% - 5 PM
76° Chance Showers And Thunderstorms 35% - 6 PM
76° Chance Showers And Thunderstorms 35% - 7 PM
75° Chance Showers And Thunderstorms 35% - 8 PM
74° Chance Showers And Thunderstorms 35% - 9 PM
72° Chance Showers And Thunderstorms 35% - 10 PM
70° Chance Showers And Thunderstorms 35% - 11 PM
69° Chance Showers And Thunderstorms 35%
- 12 AM
-
Sun 8/16
Chance Rain Showers then Partly Sunny 25% 75° · 59° - 12 AM
68° Chance Showers And Thunderstorms 35% - 1 AM
67° Chance Rain Showers 25% - 2 AM
66° Chance Rain Showers 25% - 3 AM
65° Chance Rain Showers 25% - 4 AM
64° Chance Rain Showers 25% - 5 AM
63° Chance Rain Showers 25% - 6 AM
63° Chance Rain Showers 25% - 7 AM
63° Mostly Cloudy 10% - 8 AM
64° Mostly Cloudy 10% - 9 AM
65° Mostly Cloudy 10% - 10 AM
67° Mostly Cloudy 10% - 11 AM
69° Mostly Cloudy 10% - 12 PM
71° Mostly Cloudy 10% - 1 PM
72° Mostly Sunny 5% - 2 PM
73° Mostly Sunny 5% - 3 PM
74° Mostly Sunny 5% - 4 PM
74° Mostly Sunny 5% - 5 PM
75° Mostly Sunny 5% - 6 PM
75° Partly Cloudy 5% - 7 PM
74° Partly Cloudy 13% - 8 PM
72° Partly Cloudy 13% - 9 PM
69° Partly Cloudy 13% - 10 PM
66° Partly Cloudy 13% - 11 PM
64° Partly Cloudy 13%
- 12 AM
-
Mon 8/17
Slight Chance Rain Showers then Partly Sunny 33% 77° · 62° - 12 AM
63° Partly Cloudy 13% - 1 AM
62° Slight Chance Rain Showers 15% - 2 AM
61° Slight Chance Rain Showers 15% - 3 AM
60° Slight Chance Rain Showers 15% - 4 AM
60° Slight Chance Rain Showers 15% - 5 AM
59° Slight Chance Rain Showers 15% - 6 AM
59° Slight Chance Rain Showers 15% - 7 AM
60° Mostly Cloudy 12% - 8 AM
62° Mostly Cloudy 12% - 9 AM
64° Mostly Cloudy 12% - 10 AM
67° Mostly Cloudy 12% - 11 AM
70° Mostly Cloudy 12% - 12 PM
72° Mostly Cloudy 12% - 1 PM
74° Mostly Sunny 7% - 2 PM
75° Mostly Sunny 7% - 3 PM
76° Mostly Sunny 7% - 4 PM
76° Mostly Sunny 7% - 5 PM
76° Mostly Sunny 7% - 6 PM
76° Partly Cloudy 7% - 7 PM
75° Slight Chance Showers And Thunderstorms 16% - 8 PM
73° Slight Chance Showers And Thunderstorms 16% - 9 PM
70° Slight Chance Showers And Thunderstorms 16% - 10 PM
68° Slight Chance Showers And Thunderstorms 16%
- 12 AM
Extended outlook days 8–16
- Tue 8/18
Cloudy 24% 94° · 62° - Wed 8/19
Drizzle 15% 94° · 61° - Thu 8/20
Drizzle 12% 107° · 63° - Fri 8/21
Cloudy 11% 78° · 66° - Sat 8/22
Cloudy 17% 82° · 51° - Sun 8/23
Cloudy 19% 73° · 57° - Mon 8/24
Drizzle 29% 72° · 56° - Tue 8/25
Partly Cloudy 23% 93° · 61° - 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
- Tomorrow
86°67° - Thu
77°63° - Fri
75°64° - Sat
77°62° - Sun
75°59° - Mon
77°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.
- RunTomorrow 6 AM
comfortable at 63°F · light wind (10 mph) · slight chance of rain (25%) · pollen moderate today
Excellent100 / 100 - BikeTomorrow 6 AM
comfortable at 68°F · calm wind · no rain expected · pollen moderate today
Excellent100 / 100 - Golf12 PM
comfortable at 80°F · calm wind · no rain expected · pollen moderate today
Excellent100 / 100 - Picnic12 PM
comfortable at 80°F · calm wind · no rain expected · pollen moderate today
Excellent100 / 100 - Magic ShowAnytime
Any weather is magic show weather. Indoors or out, magic doesn't care.
Corporate Magician Scott Henderson
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.
Day-by-day, 1 day out
- Yesterday±3°High85°88°-3°Low67°66°+1°
- Sun, Aug 9±1°High85°86°-1°Low67°66°+1°
- Sat, Aug 8pendingHigh86°——Low67°——
- Fri, Aug 7pendingHigh85°——Low59°——
- Thu, Aug 6pendingHigh83°——Low66°——
- Tue, Aug 4pendingHigh75°——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.
| Month | Avg high | Avg low | Rainy days |
|---|---|---|---|
| Jan | 27° | 10° | 6 |
| Feb | 34° | 15° | 5 |
| Mar | 51° | 29° | 10 |
| Apr | 59° | 38° | 14 |
| May | 71° | 50° | 11 |
| Jun | 80° | 61° | 18 |
| Jul | 85° | 66° | 18 |
| Aug | 80° | 63° | 15 |
| Sep | 78° | 58° | 7 |
| Oct | 65° | 47° | 8 |
| Nov | 45° | 30° | 9 |
| Dec | 33° | 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%.