South Dakota

South Dakota Weather in August

Average temperatures, rainfall, sunshine and the best places to visit in South Dakota, the United States of America in August.

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Sioux Falls Pierre Rapid City Deadwood

Thinking about venturing to South Dakota, the United States of America this August and curious about the weather conditions to expect? This page holds all the key information you seek, responding to your question:

What to Expect in South Dakota in August

South Dakota, the United States of America is a region in the United States of America. August in South Dakota generally has temperatures that range from warm to very warm, with precipitation levels ranging from moderate to high. August is a summer month.

Temperatures

The average highest temperatures fluctuate between warm in Lead at 26°C (79°F) to very warm in Kadoka at 31°C (88°F). Nighttime temperatures generally drop to 15°C (59°F) in Kadoka and 12°C (54°F) in Lead.

For specific regional insights in South Dakota, the United States of America, refer to the map provided below.

Precipitation

In August, precipitation varies across different areas. From moderate rainfall in Belle Fourche with an average of 50 mm (2 in) to high rainfall in North Sioux City with 103 mm (4.1 in).

Explore South Dakota by month

Pick a month to see the average temperature, rainfall and sunshine in South Dakota — and find the best time to visit. (based on Sioux Falls)

January-3°C (27°F) February-2°C (28°F) March7°C (45°F) April14°C (57°F) May21°C (70°F) June26°C (79°F) This monthJuly29°C (84°F) August28°C (82°F) September24°C (75°F) October16°C (61°F) November8°C (46°F) December-2°C (28°F)
Best Time to Visit South Dakota →

Best Places to Visit in South Dakota in August

Click on a destination dot for more details. Toggle the map to compare temperatures or precipitation across South Dakota.

Conditions Temperatures Precipitation
perfect weather
pleasant
tolerable
unpleasant
poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).

Popular Destinations in South Dakota

What is the weather like in August for some of the most popular destinations in South Dakota, the United States of America?

Temperature range in South Dakota (August)

Precipitation variation in South Dakota (August)

Sioux Falls

In August Sioux Falls generally has high temperatures with maximum daytime temperatures around 28°C (82°F), minimum nighttime temperatures around 16°C (61°F) and moderate monthly rainfall. So on average the conditions are perfect that month.

« July
August
September »
July
August
September
Max temperature
29°C (84°F)
28°C (82°F)
24°C (75°F)
Min temperature
17°C (63°F)
16°C (61°F)
10°C (50°F)
Monthly rainfall
80 mm (3.1 in)
94 mm (3.7 in)
71 mm (2.8 in)
Monthly rainy days
8 days
10 days
9 days
Weather conditions
perfect
perfect
perfect
Climate in Sioux Falls →

Pierre

In August Pierre generally has very high temperatures with maximum daytime temperatures around 30°C (86°F), minimum nighttime temperatures around 15°C (59°F) and moderate monthly rainfall. So on average the conditions are pleasant that month.

« July
August
September »
July
August
September
Max temperature
32°C (90°F)
30°C (86°F)
25°C (77°F)
Min temperature
17°C (63°F)
15°C (59°F)
10°C (50°F)
Monthly rainfall
52 mm (2 in)
67 mm (2.6 in)
40 mm (1.6 in)
Monthly rainy days
9 days
9 days
7 days
Weather conditions
pleasant
pleasant
perfect
Climate in Pierre →

Rapid City

In August Rapid City generally has high temperatures with maximum daytime temperatures around 29°C (84°F), minimum nighttime temperatures around 15°C (59°F) and moderate monthly rainfall. So on average the conditions are perfect that month.

« July
August
September »
July
August
September
Max temperature
30°C (86°F)
29°C (84°F)
24°C (75°F)
Min temperature
16°C (61°F)
15°C (59°F)
10°C (50°F)
Monthly rainfall
55 mm (2.2 in)
62 mm (2.4 in)
36 mm (1.4 in)
Monthly rainy days
11 days
10 days
6 days
Weather conditions
pleasant
perfect
perfect
Climate in Rapid City →

Deadwood

In August Deadwood generally has high temperatures with maximum daytime temperatures around 26°C (79°F), minimum nighttime temperatures around 13°C (55°F) and moderate monthly rainfall. So on average the conditions are perfect that month.

« July
August
September »
July
August
September
Max temperature
27°C (81°F)
26°C (79°F)
22°C (72°F)
Min temperature
14°C (57°F)
13°C (55°F)
8°C (46°F)
Monthly rainfall
63 mm (2.5 in)
69 mm (2.7 in)
47 mm (1.9 in)
Monthly rainy days
12 days
11 days
8 days
Weather conditions
perfect
perfect
perfect
Climate in Deadwood →

Custer

In August Custer generally has high temperatures with maximum daytime temperatures around 26°C (79°F), minimum nighttime temperatures around 11°C (52°F) and moderate monthly rainfall. So on average the conditions are perfect that month.

« July
August
September »
July
August
September
Max temperature
27°C (81°F)
26°C (79°F)
22°C (72°F)
Min temperature
12°C (54°F)
11°C (52°F)
7°C (45°F)
Monthly rainfall
76 mm (3 in)
62 mm (2.4 in)
41 mm (1.6 in)
Monthly rainy days
13 days
14 days
8 days
Weather conditions
perfect
perfect
perfect
Climate in Custer →

Is your destination not in the list? Have a look at all destinations in South Dakota, in the United States of America.

Popular cities in August

Day & night temperatures, rainfall and average weather in South Dakota in August.

City Weather Day temp Night temp Rainfall
Sioux Falls 28°C (82°F) 16°C (61°F) 94 mm (3.7 in)
Pierre 30°C (86°F) 15°C (59°F) 67 mm (2.6 in)
Rapid City 29°C (84°F) 15°C (59°F) 62 mm (2.4 in)
Deadwood 26°C (79°F) 13°C (55°F) 69 mm (2.7 in)
Custer 26°C (79°F) 11°C (52°F) 62 mm (2.4 in)
Hot Springs 31°C (88°F) 13°C (55°F) 51 mm (2 in)

South Dakota weather in August: frequently asked questions

What is the weather like in South Dakota, the United States of America in August?

August in South Dakota, the United States of America brings perfect weather. In Sioux Falls, daytime temperatures are typically around 28°C (82°F) and nighttime lows hover near 16°C (61°F).

What is the average temperature in South Dakota, the United States of America in August?

Sioux Falls averages a daytime maximum of 28°C (82°F) in August, with overnight lows close to 16°C (61°F).

Does South Dakota, the United States of America get a lot of rain in August?

Rain is generally moderate to light in South Dakota, the United States of America during August, with Sioux Falls averaging close to 94 mm (3.7 in).

Is August a Good Time to Visit South Dakota, the United States of America?

We consider August to be one of the best times to travel to South Dakota, the United States of America. Typically, the climate in Sioux Falls is perfect.

On average, the best time to visit South Dakota, the United States of America is in May, July, August and September with generally perfect weather in Sioux Falls. In contrast, January, February, March and December tend to have poor weather conditions.

Interested in more climate information?

We have much more information about the climate in South Dakota.

Weather and climate has detailed information for every country in the world. Are you going to the United States of America? Get detailed historical weather averages for many cities in the United States of America.

Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal travel conditions. Find out where to go with our weather planner.

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