2024 Compare Climate & Weather:
Sioux City, IA vs Rapid City, SD
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Highlights
On average, there are 226 sunny days per year in Rapid City. Sioux City averages 210 sunny days per year. The US average is 205 sunny days.
Rapid City, South Dakota gets 18.2 inches of rain, on average, per year. Sioux City, Iowa gets 29.5 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.
Rapid City averages 38 inches of snow per year. Sioux City averages 32.3 inches of snow per year. The US average is 27.8 inches of snow per year.
Weather Highlights
Rapid City, South Dakota
Summer High: the July high is around 85.3 degrees
Winter Low: the January low is 14.2
Rain: averages 18.2 inches of rain a year
Snow: averages 38 inches of snow a year
Sioux City, Iowa
Summer High: the July high is around 85.5 degrees
Winter Low: the January low is 9.6
Rain: averages 29.5 inches of rain a year
Snow: averages 32.3 inches of snow a year
BESTPLACES COMFORT INDEX
Rapid CityThe annual BestPlaces Comfort Index for Rapid City is 7.0 (10=best), which means it is one of the most pleasant places in South Dakota.
7 / 10
August, July and June are the most pleasant months in Rapid City, while February and January are the least comfortable months.
Sioux CityThe annual BestPlaces Comfort Index for Sioux City is 7.0 (10=best), which means it is more comfortable than most places in Iowa.
7 / 10
June, September and August are the most pleasant months in Sioux City, while January and December are the least comfortable months.
Today's Weather - Sioux City, IA
5 AM PST
Slight Chance Rain Showers then Mostly Sunny
51°F
| DAY | DESCRIPTION | HIGH / LOW | WIND |
|---|
| Today | Slight Chance Rain Showers then Mostly Sunny | 72° / 52° | W 5 to 10 mph |
| Thursday | Sunny then Slight Chance Showers And Thunderstorms | 80° / 55° | SSE 5 to 15 mph |
| Friday | Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 66° / 43° | WNW 10 to 15 mph |
| Saturday | Partly Sunny | 72° / 53° | SSE 5 to 10 mph |
| Sunday | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 72° / 51° | ENE 5 to 10 mph |
| Memorial Day | Chance Showers And Thunderstorms | 70° / 50° | NW 5 to 10 mph |
| Tuesday | Sunny | 75° / 52° | NW 5 to 10 mph |
Today's Weather - Rapid City, SD
5 AM PST
Mostly Sunny
46°F
| DAY | DESCRIPTION | HIGH / LOW | WIND |
|---|
| Today | Mostly Sunny | 73° / 49° | SW 5 to 13 mph |
| Thursday | Rain Showers Likely | 72° / 40° | SW 6 to 24 mph |
| Friday | Slight Chance Rain Showers | 65° / 44° | NW 12 to 22 mph |
| Saturday | Mostly Sunny then Slight Chance Showers And Thunderstorms | 72° / 47° | S 5 to 9 mph |
| Sunday | Showers And Thunderstorms Likely | 63° / 46° | NW 8 to 14 mph |
| Memorial Day | Chance Rain Showers then Chance Showers And Thunderstorms | 69° / 47° | NW 9 to 14 mph |
| Tuesday | Sunny | 78° / 52° | S 6 to 9 mph |
Average Monthly High / Low (°F)
| Month | Sioux City, IA | Rapid City, SD |
|---|
| January | 30° / 10° | 38° / 14° |
| February | 34° / 14° | 39° / 16° |
| March | 47° / 25° | 47° / 23° |
| April | 62° / 36° | 57° / 32° |
| May | 73° / 49° | 67° / 43° |
| June | 82° / 59° | 76° / 52° |
| July | 86° / 63° | 85° / 59° |
| August | 83° / 61° | 85° / 58° |
| September | 76° / 50° | 74° / 47° |
| October | 63° / 38° | 60° / 35° |
| November | 46° / 25° | 47° / 24° |
| December | 31° / 13° | 37° / 15° |
Hot, Freezing, Rainy, Snowy Days: Sioux City / Rapid City
| Month | Hot Days | Freezing Days | Rainy Days | Snowy Days |
|---|
| January | 0 / 0 | 31 / 29 | 5 / 4 | 4 / 5 |
| February | 0 / 0 | 27 / 26 | 4 / 5 | 3 / 5 |
| March | 0 / 0 | 24 / 25 | 7 / 6 | 3 / 4 |
| April | 0 / 0 | 11 / 15 | 9 / 9 | 1 / 3 |
| May | 1 / 0 | 1 / 3 | 10 / 11 | 0 / 0 |
| June | 4 / 2 | 0 / 0 | 10 / 12 | 0 / 0 |
| July | 7 / 9 | 0 / 0 | 8 / 9 | 0 / 0 |
| August | 5 / 8 | 0 / 0 | 8 / 8 | 0 / 0 |
| September | 2 / 2 | 1 / 1 | 7 / 6 | 0 / 0 |
| October | 0 / 0 | 9 / 10 | 6 / 7 | 0 / 1 |
| November | 0 / 0 | 23 / 23 | 6 / 4 | 2 / 3 |
| December | 0 / 0 | 30 / 29 | 5 / 4 | 4 / 4 |
July is the hottest month for Sioux City with an average high temperature of 85.5°, which ranks it as warmer than most places in Iowa. In Sioux City, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Sioux City are September, June and August.
July is the hottest month for Rapid City with an average high temperature of 85.3°, which ranks it as about average compared to other places in South Dakota. In Rapid City, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Rapid City are June, September and August.
January has the coldest nighttime temperatures for Sioux City with an average of 9.6°. This is about average compared to other places in Iowa.
January has the coldest nighttime temperatures for Rapid City with an average of 14.2°. This is one of the warmest places in South Dakota.
In Sioux City, there are 19.8 days annually when the high temperature is over 90°, which is one of the hottest places in Iowa.
In Rapid City, there are 22.5 days annually when the high temperature is over 90°, which is about average compared to other places in South Dakota.
In Sioux City, there are 155.6 days annually when the nighttime low temperature falls below freezing, which is colder than most places in Iowa.
In Rapid City, there are 159.6 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in South Dakota.
In Sioux City, there are 18.9 days annually when the nighttime low temperature falls below zero°, which is about average compared to other places in Iowa.
In Rapid City, there are 14.9 days annually when the nighttime low temperature falls below zero°, which is one of the warmest places in South Dakota.
June is the wettest month in Sioux City with 4.1 inches of rain, and the driest month is February with 0.7 inches. The wettest season is Autumn with 37% of yearly precipitation and 8% occurs in Spring, which is the driest season. The annual rainfall of 29.5 inches in Sioux City means that it is one of the driest places in Iowa.
May is the wettest month in Rapid City with 3.8 inches of rain, and the driest month is January with 0.3 inches. The wettest season is Autumn with 38% of yearly precipitation and 6% occurs in Spring, which is the driest season. The annual rainfall of 18.2 inches in Rapid City means that it is drier than most places in South Dakota.
May is the rainiest month in Sioux City with 10.3 days of rain, and February is the driest month with only 4.1 rainy days. There are 83.7 rainy days annually in Sioux City, which is one of the least rainy places in Iowa. The rainiest season is Summer when it rains 31% of the time and the driest is Spring with only a 16% chance of a rainy day.
June is the rainiest month in Rapid City with 11.8 days of rain, and November is the driest month with only 4.0 rainy days. There are 85.4 rainy days annually in Rapid City, which is rainier than most places in South Dakota. The rainiest season is Autumn when it rains 34% of the time and the driest is Spring with only a 15% chance of a rainy day.
An annual snowfall of 32.3 inches in Sioux City means that it is snowier than most places in Iowa.
An annual snowfall of 38.0 inches in Rapid City means that it is about average compared to other places in South Dakota.
December is the snowiest month in Sioux City with 7.3 inches of snow, and 6 months of the year have significant snowfall.
March is the snowiest month in Rapid City with 8.6 inches of snow, and 8 months of the year have significant snowfall.
DID YOU KNOW?
Many people confuse Weather and Climate, but they are different. Weather refers to the conditions of the atmosphere over a short period of time, while Climate refers to the conditions of the atmosphere over a long period of time.
Weather, more specifically, refers to how the atmosphere behaves and its effects on life and human activities. Most people think of Weather in terms of what can be observed: temperature, humidity, precipitation, and cloudy/sunny conditions. Weather conditions constantly change on a minute-to-minute basis.
Climate is a record of the average weather conditions for a given place over a long period of time, often referred to as Climate Normals. A 30-year period of record is a common requirement to be considered a Climate Normal.
Reviews for Sioux City 
2 Reviews
Hi. I'd like to know if you still feel the same way about living in Broomfield. I went there this past July to check it out (along with Lafayette, Boulder (can't More
Apex is perfect for what you are looking for. It's close enough to Raleigh, Durham, Chapel Hill to find a job and Cary the next town over, is a little more expensive but More
Start Your Review of Sioux City
Reviews for Rapid City 2 Reviews
Hi. I'd like to know if you still feel the same way about living in Broomfield. I went there this past July to check it out (along with Lafayette, Boulder (can't More
Apex is perfect for what you are looking for. It's close enough to Raleigh, Durham, Chapel Hill to find a job and Cary the next town over, is a little more expensive but More
Start Your Review of Rapid City
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