The remote server returned an error: (400) Bad Request.The remote server returned an error: (400) Bad Request. 2025 Compare Climate & Weather: Sioux Falls, SD vs Lewistown, MT

2025 Compare Climate & Weather:
Sioux Falls, SD vs Lewistown, MT

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Highlights

On average, there are 196 sunny days per year in Lewistown. Sioux Falls averages 211 sunny days per year. The US average is 205 sunny days.

Lewistown, Montana gets 15.8 inches of rain, on average, per year. Sioux Falls, South Dakota gets 26.7 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Lewistown averages 72.3 inches of snow per year. Sioux Falls averages 37.6 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Lewistown, Montana
Summer High: the July high is around 81 degrees
Winter Low: the January low is 13.5
Rain: averages 15.8 inches of rain a year
Snow: averages 72.3 inches of snow a year

Sioux Falls, South Dakota
Summer High: the July high is around 83.5 degrees
Winter Low: the January low is 6.3
Rain: averages 26.7 inches of rain a year
Snow: averages 37.6 inches of snow a year

BestPlaces Comfort Index
Lewistown

The annual BestPlaces Comfort Index for Lewistown is 6.5 (10=best), which means it is less comfortable than most places in Montana.

6.5 / 10
July, August and June are the most pleasant months in Lewistown, while December and January are the least comfortable months.

Sioux Falls

The annual BestPlaces Comfort Index for Sioux Falls is 6.8 (10=best), which means it is about average compared to other places in South Dakota.

6.8 / 10
August, June and September are the most pleasant months in Sioux Falls, while January and December are the least comfortable months.

Average Monthly High / Low (°F)
MonthSioux Falls, SDLewistown, MT
January26° / 6°36° / 14°
February31° / 12°37° / 16°
March43° / 23°45° / 22°
April59° / 35°55° / 30°
May70° / 47°63° / 38°
June79° / 57°71° / 46°
July84° / 62°81° / 51°
August81° / 60°81° / 50°
September73° / 50°70° / 41°
October60° / 37°57° / 32°
November43° / 23°44° / 22°
December28° / 10°35° / 14°
Hot, Freezing, Rainy, Snowy Days: Sioux Falls / Lewistown
MonthHot DaysFreezing DaysRainy DaysSnowy Days
January0 / 031 / 295 / 65 / 7
February0 / 027 / 265 / 64 / 6
March0 / 026 / 267 / 93 / 7
April0 / 012 / 189 / 102 / 5
May1 / 01 / 611 / 120 / 2
June2 / 00 / 010 / 130 / 0
July5 / 40 / 09 / 100 / 0
August2 / 50 / 08 / 90 / 0
September1 / 11 / 38 / 80 / 1
October0 / 010 / 157 / 71 / 3
November0 / 024 / 246 / 63 / 5
December0 / 031 / 285 / 75 / 7
July is the hottest month for Sioux Falls with an average high temperature of 83.5°, which ranks it as cooler than most places in South Dakota. In Sioux Falls, there are 5 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Sioux Falls are June, August and September.

August is the hottest month for Lewistown with an average high temperature of 81.1°, which ranks it as cooler than most places in Montana. In Lewistown, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Lewistown are July, August and June.
January has the coldest nighttime temperatures for Sioux Falls with an average of 6.3°. This is about average compared to other places in South Dakota.

January has the coldest nighttime temperatures for Lewistown with an average of 13.5°. This is about average compared to other places in Montana.

In Sioux Falls, there are 11.2 days annually when the high temperature is over 90°, which is cooler than most places in South Dakota.

In Lewistown, there are 10.5 days annually when the high temperature is over 90°, which is cooler than most places in Montana.

In Sioux Falls, there are 161.6 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in South Dakota.

In Lewistown, there are 175.3 days annually when the nighttime low temperature falls below freezing, which is about average compared to other places in Montana.

In Sioux Falls, there are 26.3 days annually when the nighttime low temperature falls below zero°, which is about average compared to other places in South Dakota.

In Lewistown, there are 19.2 days annually when the nighttime low temperature falls below zero°, which is about average compared to other places in Montana.

June is the wettest month in Sioux Falls with 4.0 inches of rain, and the driest month is January with 0.6 inches. The wettest season is Autumn with 38% of yearly precipitation and 7% occurs in Spring, which is the driest season. The annual rainfall of 26.7 inches in Sioux Falls means that it is wetter than most places in South Dakota.


June is the wettest month in Lewistown with 2.7 inches of rain, and the driest month is February with 0.4 inches. The wettest season is Autumn with 40% of yearly precipitation and 10% occurs in Spring, which is the driest season. The annual rainfall of 15.8 inches in Lewistown means that it is wetter than most places in Montana.

May is the rainiest month in Sioux Falls with 10.8 days of rain, and February is the driest month with only 5.1 rainy days. There are 90.1 rainy days annually in Sioux Falls, which is one of the rainiest places in South Dakota. The rainiest season is Autumn when it rains 30% of the time and the driest is Spring with only a 17% chance of a rainy day.

June is the rainiest month in Lewistown with 12.7 days of rain, and February is the driest month with only 6.2 rainy days. There are 102.6 rainy days annually in Lewistown, which is rainier than most places in Montana. The rainiest season is Autumn when it rains 30% of the time and the driest is Spring with only a 19% chance of a rainy day.

An annual snowfall of 37.6 inches in Sioux Falls means that it is about average compared to other places in South Dakota.

An annual snowfall of 72.3 inches in Lewistown means that it is snowier than most places in Montana.
December is the snowiest month in Sioux Falls with 7.0 inches of snow, and 7 months of the year have significant snowfall.

March is the snowiest month in Lewistown with 14.2 inches of snow, and 9 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 Sioux Falls    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 Sioux Falls

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Reviews for Lewistown    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 Lewistown

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Zips In Sioux Falls, South Dakota
57106, 57103, 57104, 57105, 57108, 57110, 57107, 57197, 57117
Zips In LEWISTOWN, MONTANA
59457
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