2025 Compare Climate & Weather:
Roundup, MT vs Weed, CA

Highlights

On average, there are 229 sunny days per year in Weed. Roundup averages 198 sunny days per year. The US average is 205 sunny days.

Weed, California gets 39.5 inches of rain, on average, per year. Roundup, Montana gets 14.1 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Weed averages 55 inches of snow per year. Roundup averages 32.9 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Weed, California
Summer High: the July high is around 87.1 degrees
Winter Low: the January low is 25.8
Rain: averages 39.5 inches of rain a year
Snow: averages 55 inches of snow a year

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

BestPlaces Comfort Index

The annual BestPlaces Comfort Index for Weed is 7.1 (10=best), which means it is one of the least comfortable places in California.

The annual BestPlaces Comfort Index for Roundup is 7.0 (10=best), which means it is one of the most pleasant places in Montana.

Today's Weather - Roundup, MT

56°F

Today's Weather - Weed, CA

35°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Roundup / Weed

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.

July is the hottest month for Weed with an average high temperature of 87.1°, which ranks it as about average compared to other places in California. In Weed, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Weed are June, September and May.

January has the coldest nighttime temperatures for Roundup with an average of 13.0°. This is about average compared to other places in Montana.

December has the coldest nighttime temperatures for Weed with an average of 25.6°. This is one of the coldest places in California.

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 Weed, there are 28.2 days annually when the high temperature is over 90°, which is cooler than most places in California.

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 Weed, there are 141.8 days annually when the nighttime low temperature falls below freezing, which is one of the coldest places in California.

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.

In Weed, there are 0.1 days annually when the nighttime low temperature falls below zero°, which is one of the coldest places in California.

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.


December is the wettest month in Weed with 7.0 inches of rain, and the driest month is July with 0.3 inches. The wettest season is Spring with 50% of yearly precipitation and 4% occurs in Autumn, which is the driest season. The annual rainfall of 39.5 inches in Weed means that it is wetter than most places in California.

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.

December is the rainiest month in Weed with 13.1 days of rain, and August is the driest month with only 1.7 rainy days. There are 95.7 rainy days annually in Weed, which is one of the rainiest places in California. The rainiest season is Spring when it rains 39% of the time and the driest is Autumn with only a 8% chance of a rainy day.

An annual snowfall of 32.9 inches in Roundup means that it is less snowy than most places in Montana.

An annual snowfall of 55.0 inches in Weed means that it is one of the snowiest places in California.

March is the snowiest month in Roundup with 6.6 inches of snow, and 8 months of the year have significant snowfall.

December is the snowiest month in Weed with 15.9 inches of snow, and 6 months of the year have significant snowfall.