2025 Compare Climate & Weather:
Rapid City, SD vs Las Vegas, NM

Highlights

On average, there are 272 sunny days per year in Las Vegas. Rapid City averages 226 sunny days per year. The US average is 205 sunny days.

Las Vegas, New Mexico gets 17.6 inches of rain, on average, per year. Rapid City, South Dakota gets 18.2 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Las Vegas averages 30.3 inches of snow per year. Rapid City averages 38 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Las Vegas, New Mexico
Summer High: the July high is around 84.3 degrees
Winter Low: the January low is 14.2
Rain: averages 17.6 inches of rain a year
Snow: averages 30.3 inches of snow a year

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

BestPlaces Comfort Index

The annual BestPlaces Comfort Index for Las Vegas is 7.6 (10=best), which means it is about average compared to other places in New Mexico.

The 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.

Today's Weather - Rapid City, SD

58°F

Today's Weather - Las Vegas, NM

43°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Rapid City / Las Vegas

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.

July is the hottest month for Las Vegas with an average high temperature of 84.3°, which ranks it as cooler than most places in New Mexico. In Las Vegas, there are 5 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Las Vegas are September, June and August.

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.

January has the coldest nighttime temperatures for Las Vegas with an average of 14.2°. This is one of the coldest places in New Mexico.

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 Las Vegas, there are 9.9 days annually when the high temperature is over 90°, which is cooler than most places in New Mexico.

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 Las Vegas, there are 181.1 days annually when the nighttime low temperature falls below freezing, which is colder than most places in New Mexico.

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.

In Las Vegas, there are 6.4 days annually when the nighttime low temperature falls below zero°, which is one of the coldest places in New Mexico.

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.


August is the wettest month in Las Vegas with 3.6 inches of rain, and the driest month is January with 0.5 inches. The wettest season is Autumn with 49% of yearly precipitation and 9% occurs in Spring, which is the driest season. The annual rainfall of 17.6 inches in Las Vegas means that it is wetter than most places in New Mexico.

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.

August is the rainiest month in Las Vegas with 11.2 days of rain, and November is the driest month with only 2.7 rainy days. There are 64.7 rainy days annually in Las Vegas, which is rainier than most places in New Mexico. The rainiest season is Autumn when it rains 44% of the time and the driest is Spring with only a 15% chance of a rainy day.

An annual snowfall of 38.0 inches in Rapid City means that it is about average compared to other places in South Dakota.

An annual snowfall of 30.3 inches in Las Vegas means that it is snowier than most places in New Mexico.

March is the snowiest month in Rapid City with 8.6 inches of snow, and 8 months of the year have significant snowfall.

December is the snowiest month in Las Vegas with 6.9 inches of snow, and 7 months of the year have significant snowfall.