2025 Compare Climate & Weather:
Arco, ID vs Twin Falls, ID

Highlights

On average, there are 210 sunny days per year in Twin Falls. Arco averages 200 sunny days per year. The US average is 205 sunny days.

Twin Falls, Idaho gets 10.4 inches of rain, on average, per year. Arco, Idaho gets 10.7 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Twin Falls averages 18.2 inches of snow per year. Arco averages 44.4 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Twin Falls, Idaho
Summer High: the July high is around 89.3 degrees
Winter Low: the January low is 20.3
Rain: averages 10.4 inches of rain a year
Snow: averages 18.2 inches of snow a year

Arco, Idaho
Summer High: the July high is around 85 degrees
Winter Low: the January low is 5.6
Rain: averages 10.7 inches of rain a year
Snow: averages 44.4 inches of snow a year

BestPlaces Comfort Index

The annual BestPlaces Comfort Index for Twin Falls is 7.2 (10=best), which means it is one of the most pleasant places in Idaho.

The annual BestPlaces Comfort Index for Arco is 6.7 (10=best), which means it is more comfortable than most places in Idaho.

Today's Weather - Arco, ID

53°F

Today's Weather - Twin Falls, ID

54°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Arco / Twin Falls

July is the hottest month for Arco with an average high temperature of 85.0°, which ranks it as about average compared to other places in Idaho. In Arco, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Arco are June, September and August.

July is the hottest month for Twin Falls with an average high temperature of 89.3°, which ranks it as warmer than most places in Idaho. In Twin Falls, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Twin Falls are September, June and May.

January has the coldest nighttime temperatures for Arco with an average of 5.6°. This is one of the coldest places in Idaho.

December has the coldest nighttime temperatures for Twin Falls with an average of 19.7°. This is about average compared to other places in Idaho.

In Arco, there are 14.9 days annually when the high temperature is over 90°, which is cooler than most places in Idaho.

In Twin Falls, there are 38.4 days annually when the high temperature is over 90°, which is hotter than most places in Idaho.

In Arco, there are 197.6 days annually when the nighttime low temperature falls below freezing, which is colder than most places in Idaho.

In Twin Falls, there are 146.3 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Idaho.

In Arco, there are 28.9 days annually when the nighttime low temperature falls below zero°, which is one of the coldest places in Idaho.

In Twin Falls, there are 3.3 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Idaho.

June is the wettest month in Arco with 1.4 inches of rain, and the driest month is August with 0.6 inches. The wettest season is Summer with 30% of yearly precipitation and 19% occurs in Winter, which is the driest season. The annual rainfall of 10.7 inches in Arco means that it is drier than most places in Idaho.


December is the wettest month in Twin Falls with 1.4 inches of rain, and the driest month is July with 0.2 inches. The wettest season is Summer with 32% of yearly precipitation and 13% occurs in Autumn, which is the driest season. The annual rainfall of 10.4 inches in Twin Falls means that it is drier than most places in Idaho.

May is the rainiest month in Arco with 7.3 days of rain, and September is the driest month with only 3.6 rainy days. There are 60.1 rainy days annually in Arco, which is one of the least rainy places in Idaho. The rainiest season is Summer when it rains 30% of the time and the driest is Winter with only a 22% chance of a rainy day.

December is the rainiest month in Twin Falls with 9.5 days of rain, and July is the driest month with only 2.5 rainy days. There are 78.5 rainy days annually in Twin Falls, which is less rainy than most places in Idaho. The rainiest season is Spring when it rains 33% of the time and the driest is Autumn with only a 14% chance of a rainy day.

An annual snowfall of 44.4 inches in Arco means that it is about average compared to other places in Idaho.

An annual snowfall of 18.2 inches in Twin Falls means that it is less snowy than most places in Idaho.

December is the snowiest month in Arco with 12.8 inches of snow, and 7 months of the year have significant snowfall.

December is the snowiest month in Twin Falls with 5.5 inches of snow, and 5 months of the year have significant snowfall.