2025 Compare Climate & Weather:
Los Alamos, NM vs Reston, VA

Highlights

On average, there are 197 sunny days per year in Reston. Los Alamos averages 276 sunny days per year. The US average is 205 sunny days.

Reston, Virginia gets 42.7 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.

Reston averages 21.5 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

Reston, Virginia
Summer High: the July high is around 85.5 degrees
Winter Low: the January low is 23.5
Rain: averages 42.7 inches of rain a year
Snow: averages 21.5 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 Reston is 7.3 (10=best), which means it is about average compared to other places in Virginia.

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

63°F

Today's Weather - Reston, VA

64°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Los Alamos / Reston

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 Reston with an average high temperature of 85.5°, which ranks it as cooler than most places in Virginia. In Reston, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Reston are September, June and May.

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.

January has the coldest nighttime temperatures for Reston with an average of 23.5°. This is colder than most places in Virginia.

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 Reston, there are 18.3 days annually when the high temperature is over 90°, which is cooler than most places in Virginia.

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 Reston, there are 103.7 days annually when the nighttime low temperature falls below freezing, which is about average compared to other places in Virginia.

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 Reston, there are 0.6 days annually when the nighttime low temperature falls below zero°, which is colder than most places in Virginia.

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.


May is the wettest month in Reston with 4.5 inches of rain, and the driest month is February with 2.7 inches. The wettest season is Summer with 27% of yearly precipitation and 20% occurs in Spring, which is the driest season. The annual rainfall of 42.7 inches in Reston means that it is drier than most places in Virginia.

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 Reston with 12.1 days of rain, and October is the driest month with only 8.1 rainy days. There are 117.9 rainy days annually in Reston, which is rainier than most places in Virginia. The rainiest season is Summer when it rains 28% 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 21.5 inches in Reston means that it is one of the snowiest places in Virginia.

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

February is the snowiest month in Reston with 7.8 inches of snow, and 5 months of the year have significant snowfall.