2025 Compare Climate & Weather:
Casper, WY vs Winthrop, WA

Change Cities

Highlights

On average, there are 188 sunny days per year in Winthrop. Casper averages 220 sunny days per year. The US average is 205 sunny days.

Winthrop, Washington gets 21.2 inches of rain, on average, per year. Casper, Wyoming gets 13 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Winthrop averages 88.4 inches of snow per year. Casper averages 70.3 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Winthrop, Washington
Summer High: the July high is around 84 degrees
Winter Low: the January low is 16.1
Rain: averages 21.2 inches of rain a year
Snow: averages 88.4 inches of snow a year

Casper, Wyoming
Summer High: the July high is around 88.2 degrees
Winter Low: the January low is 15.4
Rain: averages 13 inches of rain a year
Snow: averages 70.3 inches of snow a year

BestPlaces Comfort Index

Winthrop

The annual BestPlaces Comfort Index for Winthrop is 6.4 (10=best), which means it is one of the least comfortable places in Washington.

6.4 / 10

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

Casper

The annual BestPlaces Comfort Index for Casper is 6.8 (10=best), which means it is more comfortable than most places in Wyoming.

6.8 / 10

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

Average Monthly High / Low (°F)

Month	Casper, WY	Winthrop, WA
January	37° / 15°	31° / 16°
February	39° / 17°	38° / 19°
March	48° / 24°	49° / 27°
April	57° / 31°	60° / 33°
May	68° / 40°	69° / 40°
June	79° / 48°	76° / 47°
July	88° / 55°	84° / 52°
August	87° / 54°	84° / 51°
September	75° / 43°	75° / 43°
October	60° / 33°	59° / 33°
November	46° / 24°	40° / 25°
December	36° / 15°	29° / 15°

Hot, Freezing, Rainy, Snowy Days: Casper / Winthrop

Month	Hot Days	Freezing Days	Rainy Days	Snowy Days
January	0 / 0	29 / 30	5 / 13	6 / 10
February	0 / 0	26 / 26	6 / 9	6 / 5
March	0 / 0	25 / 26	7 / 9	6 / 3
April	0 / 0	17 / 15	9 / 7	5 / 0
May	0 / 1	5 / 4	10 / 7	1 / 0
June	4 / 2	0 / 0	8 / 7	0 / 0
July	13 / 8	0 / 0	6 / 5	0 / 0
August	11 / 8	0 / 0	5 / 4	0 / 0
September	1 / 2	2 / 2	6 / 5	1 / 0
October	0 / 0	14 / 14	6 / 8	3 / 1
November	0 / 0	23 / 24	6 / 14	5 / 6
December	0 / 0	28 / 30	6 / 14	6 / 12

July is the hottest month for Casper with an average high temperature of 88.2°, which ranks it as warmer than most places in Wyoming. In Casper, there are 2 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Casper are June, September and August.

August is the hottest month for Winthrop with an average high temperature of 84.1°, which ranks it as warmer than most places in Washington. In Winthrop, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Winthrop are June, September and July.

January has the coldest nighttime temperatures for Casper with an average of 15.4°. This is one of the warmest places in Wyoming.

December has the coldest nighttime temperatures for Winthrop with an average of 15.1°. This is one of the coldest places in Washington.

In Casper, there are 29.7 days annually when the high temperature is over 90°, which is hotter than most places in Wyoming.

In Winthrop, there are 19.8 days annually when the high temperature is over 90°, which is hotter than most places in Washington.

In Casper, there are 168.3 days annually when the nighttime low temperature falls below freezing, which is one of the warmest places in Wyoming.

In Winthrop, there are 171.2 days annually when the nighttime low temperature falls below freezing, which is one of the coldest places in Washington.

In Casper, there are 12.5 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Wyoming.

In Winthrop, there are 9.3 days annually when the nighttime low temperature falls below zero°, which is one of the coldest places in Washington.

May is the wettest month in Casper with 2.2 inches of rain, and the driest month is January with 0.5 inches. The wettest season is Summer with 35% of yearly precipitation and 14% occurs in Spring, which is the driest season. The annual rainfall of 13.0 inches in Casper means that it is about average compared to other places in Wyoming.

December is the wettest month in Winthrop with 3.7 inches of rain, and the driest month is August with 0.6 inches. The wettest season is Spring with 43% of yearly precipitation and 11% occurs in Autumn, which is the driest season. The annual rainfall of 21.2 inches in Winthrop means that it is drier than most places in Washington.

May is the rainiest month in Casper with 10.0 days of rain, and January is the driest month with only 5.0 rainy days. There are 79.2 rainy days annually in Casper, which is rainier than most places in Wyoming. The rainiest season is Summer when it rains 32% of the time and the driest is Spring with only a 20% chance of a rainy day.

November is the rainiest month in Winthrop with 14.0 days of rain, and August is the driest month with only 4.4 rainy days. There are 103.1 rainy days annually in Winthrop, which is less rainy than most places in Washington. The rainiest season is Spring when it rains 36% of the time and the driest is Autumn with only a 16% chance of a rainy day.

An annual snowfall of 70.3 inches in Casper means that it is snowier than most places in Wyoming.

An annual snowfall of 88.4 inches in Winthrop means that it is one of the snowiest places in Washington.

March is the snowiest month in Casper with 11.5 inches of snow, and 9 months of the year have significant snowfall.

December is the snowiest month in Winthrop with 31.8 inches of snow, and 6 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 Casper 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 Casper

See all reviews

Reviews for Winthrop 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 Winthrop

See all reviews

Most Recent Searches On Compare Climate & Weather

Compare Cost of Living

Compare Casper Cost of Living vs Winthrop Cost of Living: Taxes, Childcare, Groceries, Health...

Compare now

Premium Subscription

Includes Cost of Living compares for child care, utilities, transportation, health, taxes, housing for home owners vs renters, weather, insurance premiums and so much more.

Upgrade now

Compare City	Compared To This City
Madison, Wisconsin	Chicago, Illinois	Compare
Commerce, Texas	Greenville, Texas	Compare
Sacramento, California	Piedmont, California	Compare
Sheboygan, Wisconsin	Bloomington, Indiana	Compare
Goldendale, Washington	Lyle, Washington	Compare
Nederland, Colorado	Bristol, Vermont	Compare
New York, New York	Minneapolis, Minnesota	Compare
Flint, Michigan	Milwaukee, Wisconsin	Compare
Goldendale, Washington	Lyle, Washington	Compare
Sidney, New York	Endicott, New York	Compare

2025 Compare Climate & Weather:
Casper, WY vs Winthrop, WA

Highlights

Weather Highlights

BestPlaces Comfort Index

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Casper / Winthrop

January has the coldest nighttime temperatures for Casper with an average of 15.4°. This is one of the warmest places in Wyoming.

December has the coldest nighttime temperatures for Winthrop with an average of 15.1°. This is one of the coldest places in Washington.

In Casper, there are 29.7 days annually when the high temperature is over 90°, which is hotter than most places in Wyoming.

In Winthrop, there are 19.8 days annually when the high temperature is over 90°, which is hotter than most places in Washington.

In Casper, there are 168.3 days annually when the nighttime low temperature falls below freezing, which is one of the warmest places in Wyoming.

In Winthrop, there are 171.2 days annually when the nighttime low temperature falls below freezing, which is one of the coldest places in Washington.

In Casper, there are 12.5 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Wyoming.

In Winthrop, there are 9.3 days annually when the nighttime low temperature falls below zero°, which is one of the coldest places in Washington.

An annual snowfall of 70.3 inches in Casper means that it is snowier than most places in Wyoming.

An annual snowfall of 88.4 inches in Winthrop means that it is one of the snowiest places in Washington.

March is the snowiest month in Casper with 11.5 inches of snow, and 9 months of the year have significant snowfall.

December is the snowiest month in Winthrop with 31.8 inches of snow, and 6 months of the year have significant snowfall.

DID YOU KNOW?

Reviews for Casper 2 Reviews

Reviews for Winthrop 2 Reviews

Most Recent Searches On Compare Climate & Weather

Compare Cost of Living

Zips In Casper, Wyoming

Zips In WINTHROP, WASHINGTON

Learn More About CASPER, WYOMING

Learn More About Winthrop, Washington

Premium Subscription

BestPlaces Tools

About BestPlaces

Follow Us

2025 Compare Climate & Weather:Casper, WY vs Winthrop, WA

Highlights

Weather Highlights

BestPlaces Comfort Index

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Casper / Winthrop

January has the coldest nighttime temperatures for Casper with an average of 15.4°. This is one of the warmest places in Wyoming.December has the coldest nighttime temperatures for Winthrop with an average of 15.1°. This is one of the coldest places in Washington.

In Casper, there are 29.7 days annually when the high temperature is over 90°, which is hotter than most places in Wyoming.In Winthrop, there are 19.8 days annually when the high temperature is over 90°, which is hotter than most places in Washington.

In Casper, there are 168.3 days annually when the nighttime low temperature falls below freezing, which is one of the warmest places in Wyoming.In Winthrop, there are 171.2 days annually when the nighttime low temperature falls below freezing, which is one of the coldest places in Washington.

In Casper, there are 12.5 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Wyoming.In Winthrop, there are 9.3 days annually when the nighttime low temperature falls below zero°, which is one of the coldest places in Washington.

An annual snowfall of 70.3 inches in Casper means that it is snowier than most places in Wyoming.An annual snowfall of 88.4 inches in Winthrop means that it is one of the snowiest places in Washington.

March is the snowiest month in Casper with 11.5 inches of snow, and 9 months of the year have significant snowfall.December is the snowiest month in Winthrop with 31.8 inches of snow, and 6 months of the year have significant snowfall.

DID YOU KNOW?

Reviews for Casper 2 Reviews

Reviews for Winthrop 2 Reviews

Most Recent Searches On Compare Climate & Weather

Compare Cost of Living

Zips In Casper, Wyoming

Zips In WINTHROP, WASHINGTON

Learn More About CASPER, WYOMING

Learn More About Winthrop, Washington

Premium Subscription

BestPlaces Tools

About BestPlaces

Follow Us

2025 Compare Climate & Weather:
Casper, WY vs Winthrop, WA

January has the coldest nighttime temperatures for Casper with an average of 15.4°. This is one of the warmest places in Wyoming.

December has the coldest nighttime temperatures for Winthrop with an average of 15.1°. This is one of the coldest places in Washington.

In Casper, there are 29.7 days annually when the high temperature is over 90°, which is hotter than most places in Wyoming.

In Winthrop, there are 19.8 days annually when the high temperature is over 90°, which is hotter than most places in Washington.

In Casper, there are 168.3 days annually when the nighttime low temperature falls below freezing, which is one of the warmest places in Wyoming.

In Winthrop, there are 171.2 days annually when the nighttime low temperature falls below freezing, which is one of the coldest places in Washington.

In Casper, there are 12.5 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Wyoming.

In Winthrop, there are 9.3 days annually when the nighttime low temperature falls below zero°, which is one of the coldest places in Washington.

An annual snowfall of 70.3 inches in Casper means that it is snowier than most places in Wyoming.

An annual snowfall of 88.4 inches in Winthrop means that it is one of the snowiest places in Washington.

March is the snowiest month in Casper with 11.5 inches of snow, and 9 months of the year have significant snowfall.

December is the snowiest month in Winthrop with 31.8 inches of snow, and 6 months of the year have significant snowfall.