Which is the hottest month in South Dakota?

The hottest time of year in Sioux Falls, South Dakota is normally July. Expect maximum daytime temperatures to reach 30°C with moderate heat and humidity.

Best time to visit South Dakota

Q: When is the best time to visit South Dakota?

The best time to visit South Dakota (Sioux Falls) is June based on the following average weather conditions. Maximum daytime temperature = 22 - 30°C. Daily hours of sunshine = 10 hours or more.

Q: Which month has the most rain in South Dakota?

In terms of rainfall, June is usually the wettest month in Sioux Falls, South Dakota with 92mm on average. There are normally 11 days in June with some rain.

Q: When is it sunniest in South Dakota?

The sunniest time of year in Sioux Falls, South Dakota is normally July with bright sunshine on average for 74% of daylight hours; that's 11 hours of sunshine per day.

Find the best time to visit South Dakota and plan your perfect trip in 2025/2026. Get holiday inspiration, weather guides, travel advice and find great deals.

South Dakota by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

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Top South Dakota destinations

Below are the temperatures expected today at popular countries, regions and places in South Dakota. Select a destination to compare today's forecast with average weather conditions.

All South Dakota destinations

When is the best time to visit South Dakota?

The best time to visit South Dakota (Sioux Falls) is June based on the following average weather conditions.

Maximum daytime temperature = 22 - 30°C [remove]
Daily hours of sunshine = 10 hours or more [remove]

Change the criteria to reflect your weather preferences.

1.5
Jan
1.5
Feb
1.5
Mar
2
Apr
4.5
May
5
Jun
4
Jul
4.5
Aug
4
Sep
1.5
Oct
1
Nov
0.5
Dec

Change criteria

Max Day Temperature (°C)

-4
Jan
-1
Feb
6
Mar
15
Apr
22
May
27
Jun
30
Jul
29
Aug
23
Sep
16
Oct
6
Nov
-2
Dec

Hours of Sunshine (daily)

6
Jan
6
Feb
7
Mar
8
Apr
9
May
11
Jun
11
Jul
10
Aug
8
Sep
7
Oct
5
Nov
4
Dec

Best time to visit

Destination

Daytime temperature

Sunshine hours

Sea temperature

Monthly rainfall

Days with some rain

Heat & humidity

The weather guide for South Dakota (Sioux Falls) shows long term weather averages processed from data supplied by CRU (University of East Anglia) & today's weather forecast provided by meteoblue. Find out more about our data sources.

Metric (°C / mm) | Imperial (°F / inches)

More about South Dakota

Explore our complete guide to South Dakota with the latest travel advice for travellers and holidaymakers including official updates and local travel tips for South Dakota.

Essential travel guide
Travel guidance
Travel health
Travel features
Top travel deals
FAQs

South Dakota travel guide - essential info

Below is a beginner's guide to South Dakota with essential travel facts such as dominant language spoken, typical flight time from the UK and the local currency. You can also check whether visas are required and what plug adapter you need to pack.

South Dakota - quick facts
Flight time^✝	12.5 hours
Time difference	UK -6 to -7 hours
Language(s)	English
Currency	US Dollar
Electricity	A + B plug (120V)
Driving side	Right
Visa^✝	Yes

Why visit South Dakota?

Considering a holiday to the South Dakota? Here are some of the very good reasons it makes such a wonderful holiday destination such as for its nature to ensure you get the most out of your 2025/2026 escape.

Nature

South Dakota tourist information

South Dakota Tourism

✝ = Typical flight time from the UK and visa requirements for UK travellers.

Travelling to South Dakota?
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South Dakota travel guidance

Check the latest travel guidance and advice on visiting South Dakota from official government sources (in english) from around the world including entry requirements and travel restrictions.

UK traveller advice for the South Dakota - UK FCDO
Irish traveller advice for the South Dakota - Department of Foreign Affairs, Ireland
Canadian travel advice for the South Dakota - Government of Canada
Safe travel advisories for the South Dakota - Ministry of Foreign Affairs, New Zealand
Smarter traveller advice for the South Dakota - Department of Foreign Affairs, Australia

Learn more about the current safety and security risks from terrorism, natural disasters and more. Read about the local laws and customs to consider when travelling around South Dakota.

Note: UK FCDO - UK Foreign, Commonwealth & Development Office

South Dakota travel health

Find out more about staying safe when travelling to South Dakota with the latest guidance on required vaccinations and recommended medication to take with you.

Vaccines & medicines for the South Dakota - CDC
Health & vaccinations for the South Dakota - TravelHealthPro, NaTHNac
How to stay safe & healthy in the South Dakota - Fit for Travel, Public Health Scotland

Check out the general travel tips for staying safe and healthy in South Dakota, risks of preventable diseases and what to pack.

Note: CDC - Centers for Disease Control and Prevention

South Dakota travel features

Do you want to learn more about South Dakota? Read our latest features covering travel tips and insider destination guides on where to go and what to do in South Dakota.

We don't currently have any travel features on South Dakota. Discover more about holiday destinations around the world with this selection of general travel articles.

South Dakota FAQs

Read our frequently asked questions about travelling to South Dakota including the current entry restrictions, driving side, electrical plugs used and much more.

Which month has the most rain in South Dakota?

In terms of rainfall, January is usually the wettest month in Sioux Falls, South Dakota with 0mm on average. There are normally no days in January with some rain.

When is it sunniest in South Dakota?

The sunniest time of year in Sioux Falls, South Dakota is normally January with bright sunshine on average for 0% of daylight hours; that's 0 hours of sunshine per day.

When is the sea warmest in South Dakota?

The sea is usually at its warmest in Sioux Falls, South Dakota in January when the water temperature reaches 0°C.

What is the flight time to South Dakota from the UK?

The flight time to South Dakota from the UK is typically 12.5 hours.

What is the time difference between South Dakota and the UK?

The time difference between South Dakota and the UK is UK time-6 to UK time-7 hours.

What is the main language spoken in South Dakota?

The main language spoken in South Dakota is English.

Learn a language for South Dakota with Rosetta Stone^*, Busuu^* and Rocket Languages^*.

What is the currency in South Dakota?

The currency in South Dakota is the US Dollar (USD).

Send money to South Dakota with TransferGo^*.

Which plugs are used in South Dakota?

South Dakota uses electrical plug type A + B (120 Volts).

Which side of the road do they drive on in South Dakota?

They drive on the right side of the road in South Dakota.

Find out more about driving in USA with International Drivers Association^*.

Do you need a visa for South Dakota?

Yes, UK passport holders do need a visa to enter South Dakota.

Check USA visa requirements for all passport holders with VisaHQ^*.

South Dakota travel deals

Holidays to South Dakota

Check out the latest deals, discount codes and special offers on holidays to South Dakota in 2025/2026. Pay low deposits and save with last minute holiday availability and free kids places.