2024 Compare Climate & Weather:
Plains, MT vs Roundup, MT
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Highlights
On average, there are 198 sunny days per year in Roundup. Plains averages 154 sunny days per year. The US average is 205 sunny days.
Roundup, Montana gets 14.1 inches of rain, on average, per year. Plains, Montana gets 18.9 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. Plains averages 39.4 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
Plains, Montana
Summer High: the July high is around 86 degrees
Winter Low: the January low is 20.9
Rain: averages 18.9 inches of rain a year
Snow: averages 39.4 inches of snow a year
BESTPLACES COMFORT INDEX
RoundupThe 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.
PlainsThe annual BestPlaces Comfort Index for Plains is 6.6 (10=best), which means it is about average compared to other places in Montana.
6.6 / 10
July, June and September are the most pleasant months in Plains, while December and January are the least comfortable months.
Today's Weather - Plains, MT
4 PM PST
Mostly Sunny
51°F
| DAY | DESCRIPTION | HIGH / LOW | WIND |
|---|
| This Afternoon | Mostly Sunny | 51° / 26° | ENE 10 mph |
| Saturday | Sunny | 62° / 37° | ENE 2 to 7 mph |
| Sunday | Partly Sunny | 55° / 32° | WSW 15 mph |
| Monday | Mostly Sunny | 62° / 32° | W 5 to 10 mph |
| Tuesday | Mostly Sunny | 68° / 39° | ESE 3 to 9 mph |
| Wednesday | Partly Sunny | 67° / 39° | WSW 5 to 13 mph |
| Thursday | Slight Chance Light Rain | 67° / 42° | WSW 6 to 10 mph |
Today's Weather - Roundup, MT
4 PM PST
Partly Sunny
42°F
| DAY | DESCRIPTION | HIGH / LOW | WIND |
|---|
| This Afternoon | Partly Sunny | 42° / 21° | N 12 mph |
| Saturday | Sunny | 51° / 27° | ESE 6 mph |
| Sunday | Partly Sunny | 67° / 33° | SW 7 to 14 mph |
| Monday | Mostly Sunny | 60° / 33° | WNW 14 to 23 mph |
| Tuesday | Mostly Sunny | 62° / 37° | S 10 mph |
| Wednesday | Mostly Sunny | 72° / 44° | SW 6 to 12 mph |
| Thursday | Chance Light Rain | 68° / 43° | NW 9 to 15 mph |
Average Monthly High / Low (°F)
| Month | Plains, MT | Roundup, MT |
|---|
| January | 35° / 21° | 38° / 13° |
| February | 41° / 22° | 42° / 16° |
| March | 51° / 27° | 51° / 23° |
| April | 60° / 32° | 60° / 31° |
| May | 69° / 39° | 69° / 40° |
| June | 76° / 45° | 78° / 49° |
| July | 86° / 49° | 88° / 55° |
| August | 86° / 48° | 87° / 52° |
| September | 75° / 41° | 76° / 43° |
| October | 59° / 33° | 62° / 32° |
| November | 43° / 26° | 47° / 21° |
| December | 33° / 19° | 37° / 14° |
Hot, Freezing, Rainy, Snowy Days: Plains / Roundup
| Month | Hot Days | Freezing Days | Rainy Days | Snowy Days |
|---|
| January | 0 / 0 | 28 / 29 | 13 / 4 | 6 / 4 |
| February | 0 / 0 | 24 / 26 | 11 / 4 | 4 / 3 |
| March | 0 / 0 | 24 / 26 | 12 / 6 | 3 / 3 |
| April | 0 / 0 | 15 / 17 | 11 / 7 | 1 / 2 |
| May | 1 / 1 | 5 / 4 | 13 / 10 | 0 / 0 |
| June | 2 / 3 | 1 / 0 | 11 / 10 | 0 / 0 |
| July | 11 / 14 | 0 / 0 | 7 / 7 | 0 / 0 |
| August | 11 / 13 | 0 / 0 | 6 / 5 | 0 / 0 |
| September | 2 / 4 | 3 / 2 | 8 / 6 | 0 / 0 |
| October | 0 / 0 | 14 / 15 | 10 / 6 | 0 / 1 |
| November | 0 / 0 | 22 / 26 | 14 / 4 | 3 / 2 |
| December | 0 / 0 | 28 / 29 | 13 / 4 | 7 / 4 |
July is the hottest month for Plains with an average high temperature of 86.0°, which ranks it as warmer than most places in Montana. In Plains, there are 2 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Plains are June, September and August.
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.
December has the coldest nighttime temperatures for Plains with an average of 19.4°. This is warmer than most places in Montana.
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 Plains, there are 26.5 days annually when the high temperature is over 90°, which is hotter than most places in Montana.
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 Plains, there are 164.9 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Montana.
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 Plains, there are 5.5 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Montana.
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.
November is the wettest month in Plains with 2.3 inches of rain, and the driest month is July with 1.0 inches. The wettest season is Winter with 27% of yearly precipitation and 22% occurs in Autumn, which is the driest season. The annual rainfall of 18.9 inches in Plains means that it is wetter than most places in Montana.
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.
November is the rainiest month in Plains with 14.3 days of rain, and August is the driest month with only 6.3 rainy days. There are 129.5 rainy days annually in Plains, which is one of the rainiest places in Montana. The rainiest season is Spring when it rains 29% of the time and the driest is Autumn with only a 19% 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 39.4 inches in Plains means that it is about average compared to other places in Montana.
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 Plains with 13.0 inches of snow, and 6 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 Plains 
2 Reviews
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
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
Start Your Review of Plains
Reviews for Roundup 2 Reviews
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
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
Start Your Review of Roundup
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