2025 Compare Climate & Weather:
Afton, WY vs Hamilton, MT

Highlights

On average, there are 158 sunny days per year in Hamilton. Afton averages 208 sunny days per year. The US average is 205 sunny days.

Hamilton, Montana gets 13.1 inches of rain, on average, per year. Afton, Wyoming gets 19.1 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Hamilton averages 32.1 inches of snow per year. Afton averages 86.5 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Hamilton, Montana
Summer High: the July high is around 84.2 degrees
Winter Low: the January low is 18.8
Rain: averages 13.1 inches of rain a year
Snow: averages 32.1 inches of snow a year

Afton, Wyoming
Summer High: the July high is around 81.1 degrees
Winter Low: the January low is 5.1
Rain: averages 19.1 inches of rain a year
Snow: averages 86.5 inches of snow a year

BestPlaces Comfort Index

The annual BestPlaces Comfort Index for Hamilton is 6.8 (10=best), which means it is more comfortable than most places in Montana.

The annual BestPlaces Comfort Index for Afton is 5.9 (10=best), which means it is less comfortable than most places in Wyoming.

Today's Weather - Afton, WY

47°F

Today's Weather - Hamilton, MT

48°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Afton / Hamilton

July is the hottest month for Afton with an average high temperature of 81.1°, which ranks it as cooler than most places in Wyoming. In Afton, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Afton are August, July and June.

July is the hottest month for Hamilton with an average high temperature of 84.2°, which ranks it as about average compared to other places in Montana. In Hamilton, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Hamilton are June, August and September.

January has the coldest nighttime temperatures for Afton with an average of 5.1°. This is colder than most places in Wyoming.

December has the coldest nighttime temperatures for Hamilton with an average of 16.8°. This is warmer than most places in Montana.

In Afton, there are 3.4 days annually when the high temperature is over 90°, which is cooler than most places in Wyoming.

In Hamilton, there are 15.4 days annually when the high temperature is over 90°, which is cooler than most places in Montana.

In Afton, there are 221.8 days annually when the nighttime low temperature falls below freezing, which is colder than most places in Wyoming.

In Hamilton, there are 169.2 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Montana.

In Afton, there are 34.5 days annually when the nighttime low temperature falls below zero°, which is colder than most places in Wyoming.

In Hamilton, there are 7.7 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Montana.

May is the wettest month in Afton with 2.3 inches of rain, and the driest month is July with 1.2 inches. The wettest season is Summer with 28% of yearly precipitation and 22% occurs in Autumn, which is the driest season. The annual rainfall of 19.1 inches in Afton means that it is one of the wettest places in Wyoming.


June is the wettest month in Hamilton with 1.7 inches of rain, and the driest month is February with 0.7 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 13.1 inches in Hamilton means that it is drier than most places in Montana.

December is the rainiest month in Afton with 11.8 days of rain, and August is the driest month with only 6.1 rainy days. There are 109.2 rainy days annually in Afton, which is one of the rainiest places in Wyoming. The rainiest season is Spring when it rains 30% of the time and the driest is Autumn with only a 19% chance of a rainy day.

June is the rainiest month in Hamilton with 11.0 days of rain, and July is the driest month with only 6.6 rainy days. There are 106.4 rainy days annually in Hamilton, which is rainier than most places in Montana. The rainiest season is Summer when it rains 28% of the time and the driest is Autumn with only a 24% chance of a rainy day.

An annual snowfall of 86.5 inches in Afton means that it is one of the snowiest places in Wyoming.

An annual snowfall of 32.1 inches in Hamilton means that it is less snowy than most places in Montana.

January is the snowiest month in Afton with 20.9 inches of snow, and 8 months of the year have significant snowfall.

December is the snowiest month in Hamilton with 9.4 inches of snow, and 6 months of the year have significant snowfall.