2025 Compare Climate & Weather:
Duncannon, PA vs Billings, MT

Highlights

On average, there are 205 sunny days per year in Billings. Duncannon averages 199 sunny days per year. The US average is 205 sunny days.

Billings, Montana gets 14.2 inches of rain, on average, per year. Duncannon, Pennsylvania gets 43.9 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Billings averages 46.3 inches of snow per year. Duncannon averages 30.2 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Billings, Montana
Summer High: the July high is around 88.3 degrees
Winter Low: the January low is 15.8
Rain: averages 14.2 inches of rain a year
Snow: averages 46.3 inches of snow a year

Duncannon, Pennsylvania
Summer High: the July high is around 84 degrees
Winter Low: the January low is 20.5
Rain: averages 43.9 inches of rain a year
Snow: averages 30.2 inches of snow a year

BestPlaces Comfort Index

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

The annual BestPlaces Comfort Index for Duncannon is 7.1 (10=best), which means it is more comfortable than most places in Pennsylvania.

Today's Weather - Duncannon, PA

65°F

Today's Weather - Billings, MT

37°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Duncannon / Billings

July is the hottest month for Duncannon with an average high temperature of 84.0°, which ranks it as warmer than most places in Pennsylvania. In Duncannon, there are 5 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Duncannon are June, September and August.

July is the hottest month for Billings with an average high temperature of 88.3°, which ranks it as one of the hottest places in Montana. In Billings, there are 2 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Billings are June, September and May.

January has the coldest nighttime temperatures for Duncannon with an average of 20.5°. This is warmer than most places in Pennsylvania.

January has the coldest nighttime temperatures for Billings with an average of 15.8°. This is warmer than most places in Montana.

In Duncannon, there are 11.5 days annually when the high temperature is over 90°, which is hotter than most places in Pennsylvania.

In Billings, there are 33.1 days annually when the high temperature is over 90°, which is one of the hottest places in Montana.

In Duncannon, there are 119.8 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Pennsylvania.

In Billings, there are 151.5 days annually when the nighttime low temperature falls below freezing, which is one of the warmest places in Montana.

In Duncannon, there are 1.1 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Pennsylvania.

In Billings, there are 12.6 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Montana.

June is the wettest month in Duncannon with 4.3 inches of rain, and the driest month is January with 2.9 inches. The wettest season is Autumn with 28% of yearly precipitation and 21% occurs in Spring, which is the driest season. The annual rainfall of 43.9 inches in Duncannon means that it is about average compared to other places in Pennsylvania.


May is the wettest month in Billings with 2.3 inches of rain, and the driest month is January with 0.5 inches. The wettest season is Summer with 35% of yearly precipitation and 11% occurs in Spring, which is the driest season. The annual rainfall of 14.2 inches in Billings means that it is about average compared to other places in Montana.

May is the rainiest month in Duncannon with 12.8 days of rain, and September is the driest month with only 8.7 rainy days. There are 122.1 rainy days annually in Duncannon, which is less rainy than most places in Pennsylvania. The rainiest season is Summer when it rains 28% of the time and the driest is Spring with only a 23% chance of a rainy day.

May is the rainiest month in Billings with 11.0 days of rain, and January is the driest month with only 5.4 rainy days. There are 88.3 rainy days annually in Billings, which is about average compared to other places in Montana. The rainiest season is Summer when it rains 31% of the time and the driest is Spring with only a 19% chance of a rainy day.

An annual snowfall of 30.2 inches in Duncannon means that it is about average compared to other places in Pennsylvania.

An annual snowfall of 46.3 inches in Billings means that it is snowier than most places in Montana.

January is the snowiest month in Duncannon with 9.8 inches of snow, and 6 months of the year have significant snowfall.

March is the snowiest month in Billings with 9.2 inches of snow, and 9 months of the year have significant snowfall.