2025 Compare Climate & Weather:
Los Alamos, NM vs Big Sky, MT

Highlights

On average, there are 187 sunny days per year in Big Sky. Los Alamos averages 276 sunny days per year. The US average is 205 sunny days.

Big Sky, Montana gets 20.2 inches of rain, on average, per year. Los Alamos, New Mexico gets 16.4 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Big Sky averages 46.1 inches of snow per year. Los Alamos averages 38.5 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Big Sky, Montana
Summer High: the July high is around 77.9 degrees
Winter Low: the January low is 7.6
Rain: averages 20.2 inches of rain a year
Snow: averages 46.1 inches of snow a year

Los Alamos, New Mexico
Summer High: the July high is around 83.8 degrees
Winter Low: the January low is 18.6
Rain: averages 16.4 inches of rain a year
Snow: averages 38.5 inches of snow a year

BestPlaces Comfort Index

The annual BestPlaces Comfort Index for Big Sky is 6.0 (10=best), which means it is one of the least comfortable places in Montana.

The annual BestPlaces Comfort Index for Los Alamos is 7.4 (10=best), which means it is less comfortable than most places in New Mexico.

Today's Weather - Los Alamos, NM

61°F

Today's Weather - Big Sky, MT

42°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Los Alamos / Big Sky

July is the hottest month for Los Alamos with an average high temperature of 83.8°, which ranks it as cooler than most places in New Mexico. In Los Alamos, there are 5 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Los Alamos are September, August and June.

July is the hottest month for Big Sky with an average high temperature of 77.9°, which ranks it as one of the coolest places in Montana. In Big Sky, there are 2 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Big Sky are July, August and June.

January has the coldest nighttime temperatures for Los Alamos with an average of 18.6°. This is about average compared to other places in New Mexico.

December has the coldest nighttime temperatures for Big Sky with an average of 6.5°. This is colder than most places in Montana.

In Los Alamos, there are 9.5 days annually when the high temperature is over 90°, which is cooler than most places in New Mexico.

In Big Sky, there are 1.6 days annually when the high temperature is over 90°, which is one of the coolest places in Montana.

In Los Alamos, there are 155.4 days annually when the nighttime low temperature falls below freezing, which is about average compared to other places in New Mexico.

In Big Sky, there are 253.5 days annually when the nighttime low temperature falls below freezing, which is one of the coldest places in Montana.

In Los Alamos, there are 0.9 days annually when the nighttime low temperature falls below zero°, which is about average compared to other places in New Mexico.

In Big Sky, there are 28.0 days annually when the nighttime low temperature falls below zero°, which is colder than most places in Montana.

August is the wettest month in Los Alamos with 2.8 inches of rain, and the driest month is February with 0.7 inches. The wettest season is Autumn with 41% of yearly precipitation and 15% occurs in Spring, which is the driest season. The annual rainfall of 16.4 inches in Los Alamos means that it is wetter than most places in New Mexico.


June is the wettest month in Big Sky with 2.7 inches of rain, and the driest month is February with 1.0 inches. The wettest season is Autumn with 29% of yearly precipitation and 20% occurs in Spring, which is the driest season. The annual rainfall of 20.2 inches in Big Sky means that it is wetter than most places in Montana.

August is the rainiest month in Los Alamos with 12.4 days of rain, and January is the driest month with only 4.5 rainy days. There are 80.0 rainy days annually in Los Alamos, which is one of the rainiest places in New Mexico. The rainiest season is Autumn when it rains 37% of the time and the driest is Spring with only a 18% chance of a rainy day.

May is the rainiest month in Big Sky with 12.7 days of rain, and October is the driest month with only 7.8 rainy days. There are 123.6 rainy days annually in Big Sky, which is one of the rainiest places in Montana. The rainiest season is Summer when it rains 27% of the time and the driest is Winter with only a 22% chance of a rainy day.

An annual snowfall of 38.5 inches in Los Alamos means that it is snowier than most places in New Mexico.

An annual snowfall of 46.1 inches in Big Sky means that it is snowier than most places in Montana.

December is the snowiest month in Los Alamos with 8.9 inches of snow, and 7 months of the year have significant snowfall.

January is the snowiest month in Big Sky with 8.6 inches of snow, and 8 months of the year have significant snowfall.