2025 Compare Climate & Weather:
Basin, WY vs Roundup, MT

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Highlights

On average, there are 198 sunny days per year in Roundup. Basin averages 207 sunny days per year. The US average is 205 sunny days.

Roundup, Montana gets 14.1 inches of rain, on average, per year. Basin, Wyoming gets 7 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Roundup averages 32.9 inches of snow per year. Basin averages 18.7 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Roundup, Montana
Summer High: the July high is around 88.1 degrees
Winter Low: the January low is 13
Rain: averages 14.1 inches of rain a year
Snow: averages 32.9 inches of snow a year

Basin, Wyoming
Summer High: the July high is around 90 degrees
Winter Low: the January low is 3.5
Rain: averages 7 inches of rain a year
Snow: averages 18.7 inches of snow a year

BestPlaces Comfort Index

Roundup

The annual BestPlaces Comfort Index for Roundup is 7.0 (10=best), which means it is one of the most pleasant places in Montana.

7 / 10

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

Basin

The annual BestPlaces Comfort Index for Basin is 7.0 (10=best), which means it is one of the most pleasant places in Wyoming.

7 / 10

June, September and May are the most pleasant months in Basin, while January and December are the least comfortable months.

Average Monthly High / Low (°F)

Month	Basin, WY	Roundup, MT
January	29° / 4°	38° / 13°
February	37° / 11°	42° / 16°
March	51° / 23°	51° / 23°
April	61° / 32°	60° / 31°
May	71° / 42°	69° / 40°
June	81° / 51°	78° / 49°
July	90° / 56°	88° / 55°
August	89° / 54°	87° / 52°
September	76° / 42°	76° / 43°
October	61° / 31°	62° / 32°
November	44° / 18°	47° / 21°
December	30° / 5°	37° / 14°

Hot, Freezing, Rainy, Snowy Days: Basin / Roundup

Month	Hot Days	Freezing Days	Rainy Days	Snowy Days
January	0 / 0	31 / 29	3 / 4	2 / 4
February	0 / 0	28 / 26	3 / 4	2 / 3
March	0 / 0	27 / 26	3 / 6	2 / 3
April	0 / 0	15 / 17	4 / 7	1 / 2
May	1 / 1	3 / 4	6 / 10	0 / 0
June	6 / 3	0 / 0	7 / 10	0 / 0
July	17 / 14	0 / 0	4 / 7	0 / 0
August	15 / 13	0 / 0	3 / 5	0 / 0
September	2 / 4	2 / 2	5 / 6	0 / 0
October	0 / 0	17 / 15	4 / 6	1 / 1
November	0 / 0	28 / 26	3 / 4	2 / 2
December	0 / 0	31 / 29	3 / 4	3 / 4

July is the hottest month for Basin with an average high temperature of 90.0°, which ranks it as one of the hottest places in Wyoming. In Basin, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Basin are September, June and May.

July is the hottest month for Roundup with an average high temperature of 88.1°, which ranks it as one of the hottest places in Montana. In Roundup, there are 2 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Roundup are June, September and May.

January has the coldest nighttime temperatures for Basin with an average of 3.5°. This is colder than most places in Wyoming.

January has the coldest nighttime temperatures for Roundup with an average of 13.0°. This is about average compared to other places in Montana.

In Basin, there are 41.0 days annually when the high temperature is over 90°, which is one of the hottest places in Wyoming.

In Roundup, there are 33.7 days annually when the high temperature is over 90°, which is one of the hottest places in Montana.

In Basin, there are 181.2 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Wyoming.

In Roundup, there are 172.8 days annually when the nighttime low temperature falls below freezing, which is about average compared to other places in Montana.

In Basin, there are 27.6 days annually when the nighttime low temperature falls below zero°, which is colder than most places in Wyoming.

In Roundup, there are 17.5 days annually when the nighttime low temperature falls below zero°, which is about average compared to other places in Montana.

May is the wettest month in Basin with 1.4 inches of rain, and the driest month is January with 0.2 inches. The wettest season is Summer with 34% of yearly precipitation and 11% occurs in Spring, which is the driest season. The annual rainfall of 7.0 inches in Basin means that it is one of the driest places in Wyoming.

June is the wettest month in Roundup with 2.5 inches of rain, and the driest month is January with 0.4 inches. The wettest season is Autumn with 36% of yearly precipitation and 10% occurs in Spring, which is the driest season. The annual rainfall of 14.1 inches in Roundup means that it is about average compared to other places in Montana.

June is the rainiest month in Basin with 6.5 days of rain, and February is the driest month with only 2.5 rainy days. There are 46.4 rainy days annually in Basin, which is one of the least rainy places in Wyoming. The rainiest season is Summer when it rains 30% of the time and the driest is Spring with only a 18% chance of a rainy day.

June is the rainiest month in Roundup with 10.3 days of rain, and November is the driest month with only 3.9 rainy days. There are 73.8 rainy days annually in Roundup, which is less rainy than most places in Montana. The rainiest season is Summer when it rains 31% of the time and the driest is Spring with only a 17% chance of a rainy day.

An annual snowfall of 18.7 inches in Basin means that it is one of the least snowy places in Wyoming.

An annual snowfall of 32.9 inches in Roundup means that it is less snowy than most places in Montana.

December is the snowiest month in Basin with 4.1 inches of snow, and 8 months of the year have significant snowfall.

March is the snowiest month in Roundup with 6.6 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 Basin 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 Roundup 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

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2025 Compare Climate & Weather:
Basin, WY vs Roundup, MT

Highlights

Weather Highlights

BestPlaces Comfort Index

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Basin / Roundup

January has the coldest nighttime temperatures for Basin with an average of 3.5°. This is colder than most places in Wyoming.

January has the coldest nighttime temperatures for Roundup with an average of 13.0°. This is about average compared to other places in Montana.

In Basin, there are 41.0 days annually when the high temperature is over 90°, which is one of the hottest places in Wyoming.

In Roundup, there are 33.7 days annually when the high temperature is over 90°, which is one of the hottest places in Montana.

In Basin, there are 27.6 days annually when the nighttime low temperature falls below zero°, which is colder than most places in Wyoming.

In Roundup, there are 17.5 days annually when the nighttime low temperature falls below zero°, which is about average compared to other places in Montana.

An annual snowfall of 18.7 inches in Basin means that it is one of the least snowy places in Wyoming.

An annual snowfall of 32.9 inches in Roundup means that it is less snowy than most places in Montana.

December is the snowiest month in Basin with 4.1 inches of snow, and 8 months of the year have significant snowfall.

March is the snowiest month in Roundup with 6.6 inches of snow, and 8 months of the year have significant snowfall.

DID YOU KNOW?

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2025 Compare Climate & Weather:Basin, WY vs Roundup, MT

Highlights

Weather Highlights

BestPlaces Comfort Index

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Basin / Roundup

January has the coldest nighttime temperatures for Basin with an average of 3.5°. This is colder than most places in Wyoming.January has the coldest nighttime temperatures for Roundup with an average of 13.0°. This is about average compared to other places in Montana.

In Basin, there are 41.0 days annually when the high temperature is over 90°, which is one of the hottest places in Wyoming.In Roundup, there are 33.7 days annually when the high temperature is over 90°, which is one of the hottest places in Montana.

In Basin, there are 181.2 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Wyoming.In Roundup, there are 172.8 days annually when the nighttime low temperature falls below freezing, which is about average compared to other places in Montana.

In Basin, there are 27.6 days annually when the nighttime low temperature falls below zero°, which is colder than most places in Wyoming.In Roundup, there are 17.5 days annually when the nighttime low temperature falls below zero°, which is about average compared to other places in Montana.

An annual snowfall of 18.7 inches in Basin means that it is one of the least snowy places in Wyoming.An annual snowfall of 32.9 inches in Roundup means that it is less snowy than most places in Montana.

December is the snowiest month in Basin with 4.1 inches of snow, and 8 months of the year have significant snowfall.March is the snowiest month in Roundup with 6.6 inches of snow, and 8 months of the year have significant snowfall.

DID YOU KNOW?

Reviews for Basin 2 Reviews

Reviews for Roundup 2 Reviews

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Zips In Basin, Wyoming

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2025 Compare Climate & Weather:
Basin, WY vs Roundup, MT

January has the coldest nighttime temperatures for Basin with an average of 3.5°. This is colder than most places in Wyoming.

January has the coldest nighttime temperatures for Roundup with an average of 13.0°. This is about average compared to other places in Montana.

In Basin, there are 41.0 days annually when the high temperature is over 90°, which is one of the hottest places in Wyoming.

In Roundup, there are 33.7 days annually when the high temperature is over 90°, which is one of the hottest places in Montana.

In Basin, there are 27.6 days annually when the nighttime low temperature falls below zero°, which is colder than most places in Wyoming.

In Roundup, there are 17.5 days annually when the nighttime low temperature falls below zero°, which is about average compared to other places in Montana.

An annual snowfall of 18.7 inches in Basin means that it is one of the least snowy places in Wyoming.

An annual snowfall of 32.9 inches in Roundup means that it is less snowy than most places in Montana.

December is the snowiest month in Basin with 4.1 inches of snow, and 8 months of the year have significant snowfall.

March is the snowiest month in Roundup with 6.6 inches of snow, and 8 months of the year have significant snowfall.