2025 Compare Climate & Weather:
Arco, ID vs La Grande, OR

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Highlights

On average, there are 192 sunny days per year in La Grande. Arco averages 200 sunny days per year. The US average is 205 sunny days.

La Grande, Oregon gets 17.9 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.

La Grande averages 23.2 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

La Grande, Oregon
Summer High: the July high is around 85.6 degrees
Winter Low: the January low is 25.9
Rain: averages 17.9 inches of rain a year
Snow: averages 23.2 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

La Grande

The annual BestPlaces Comfort Index for La Grande is 7.0 (10=best), which means it is less comfortable than most places in Oregon.

7 / 10

July, September and August are the most pleasant months in La Grande, while January and December are the least comfortable months.

Arco

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

6.7 / 10

August, July and June are the most pleasant months in Arco, while January and December are the least comfortable months.

Average Monthly High / Low (°F)

Month	Arco, ID	La Grande, OR
January	29° / 6°	39° / 26°
February	34° / 9°	43° / 28°
March	45° / 21°	52° / 32°
April	56° / 29°	59° / 36°
May	66° / 37°	67° / 42°
June	75° / 44°	75° / 48°
July	85° / 50°	86° / 53°
August	84° / 48°	86° / 52°
September	74° / 39°	77° / 44°
October	60° / 29°	63° / 36°
November	42° / 18°	47° / 31°
December	30° / 7°	38° / 25°

Hot, Freezing, Rainy, Snowy Days: Arco / La Grande

Month	Hot Days	Freezing Days	Rainy Days	Snowy Days
January	0 / 0	31 / 23	5 / 12	5 / 5
February	0 / 0	28 / 19	5 / 10	4 / 3
March	0 / 0	28 / 17	5 / 12	2 / 1
April	0 / 0	19 / 8	6 / 11	1 / 0
May	0 / 0	8 / 2	7 / 11	0 / 0
June	1 / 1	1 / 0	6 / 9	0 / 0
July	8 / 10	0 / 0	4 / 4	0 / 0
August	6 / 11	0 / 0	4 / 4	0 / 0
September	1 / 3	6 / 1	4 / 5	0 / 0
October	0 / 0	19 / 9	4 / 8	0 / 0
November	0 / 0	28 / 16	5 / 13	3 / 2
December	0 / 0	31 / 24	5 / 12	5 / 5

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.

August is the hottest month for La Grande with an average high temperature of 86.0°, which ranks it as warmer than most places in Oregon. In La Grande, there are 2 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for La Grande are September, June and July.

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 La Grande with an average of 24.9°. This is colder than most places in Oregon.

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

In La Grande, there are 24.9 days annually when the high temperature is over 90°, which is hotter than most places in Oregon.

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 La Grande, there are 118.9 days annually when the nighttime low temperature falls below freezing, which is colder than most places in Oregon.

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 La Grande, there are 1.2 days annually when the nighttime low temperature falls below zero°, which is colder than most places in Oregon.

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.

November is the wettest month in La Grande with 2.2 inches of rain, and the driest month is July with 0.7 inches. The wettest season is Summer with 30% of yearly precipitation and 17% occurs in Autumn, which is the driest season. The annual rainfall of 17.9 inches in La Grande means that it is drier than most places in Oregon.

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.

November is the rainiest month in La Grande with 12.9 days of rain, and August is the driest month with only 4.1 rainy days. There are 110.4 rainy days annually in La Grande, which is less rainy than most places in Oregon. The rainiest season is Summer when it rains 31% of the time and the driest is Autumn with only a 16% 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 23.2 inches in La Grande means that it is snowier than most places in Oregon.

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

January is the snowiest month in La Grande with 7.3 inches of snow, and 5 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 Arco 2 Reviews

Jill · Sherman Oaks, CA

re:

Over 16 years ago

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

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NC For Me · Apex, NC

re:

Over 16 years ago

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

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Reviews for La Grande 2 Reviews

Jill · Sherman Oaks, CA

re:

Over 16 years ago

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

| Reply

NC For Me · Apex, NC

re:

Over 16 years ago

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

| Reply

Start Your Review of La Grande

See all reviews

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2025 Compare Climate & Weather:
Arco, ID vs La Grande, OR

Highlights

Weather Highlights

BestPlaces Comfort Index

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Arco / La Grande

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 La Grande with an average of 24.9°. This is colder than most places in Oregon.

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

In La Grande, there are 24.9 days annually when the high temperature is over 90°, which is hotter than most places in Oregon.

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 La Grande, there are 118.9 days annually when the nighttime low temperature falls below freezing, which is colder than most places in Oregon.

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 La Grande, there are 1.2 days annually when the nighttime low temperature falls below zero°, which is colder than most places in Oregon.

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 23.2 inches in La Grande means that it is snowier than most places in Oregon.

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

January is the snowiest month in La Grande with 7.3 inches of snow, and 5 months of the year have significant snowfall.

DID YOU KNOW?

Reviews for Arco 2 Reviews

Reviews for La Grande 2 Reviews

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2025 Compare Climate & Weather:Arco, ID vs La Grande, OR

Highlights

Weather Highlights

BestPlaces Comfort Index

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Arco / La Grande

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 La Grande with an average of 24.9°. This is colder than most places in Oregon.

In Arco, there are 14.9 days annually when the high temperature is over 90°, which is cooler than most places in Idaho.In La Grande, there are 24.9 days annually when the high temperature is over 90°, which is hotter than most places in Oregon.

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 La Grande, there are 118.9 days annually when the nighttime low temperature falls below freezing, which is colder than most places in Oregon.

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 La Grande, there are 1.2 days annually when the nighttime low temperature falls below zero°, which is colder than most places in Oregon.

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 23.2 inches in La Grande means that it is snowier than most places in Oregon.

December is the snowiest month in Arco with 12.8 inches of snow, and 7 months of the year have significant snowfall.January is the snowiest month in La Grande with 7.3 inches of snow, and 5 months of the year have significant snowfall.

DID YOU KNOW?

Reviews for Arco 2 Reviews

Reviews for La Grande 2 Reviews

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Zips In Arco, Idaho

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2025 Compare Climate & Weather:
Arco, ID vs La Grande, OR

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 La Grande with an average of 24.9°. This is colder than most places in Oregon.

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

In La Grande, there are 24.9 days annually when the high temperature is over 90°, which is hotter than most places in Oregon.

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 La Grande, there are 118.9 days annually when the nighttime low temperature falls below freezing, which is colder than most places in Oregon.

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 La Grande, there are 1.2 days annually when the nighttime low temperature falls below zero°, which is colder than most places in Oregon.

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 23.2 inches in La Grande means that it is snowier than most places in Oregon.

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

January is the snowiest month in La Grande with 7.3 inches of snow, and 5 months of the year have significant snowfall.