2025 Compare Climate & Weather:
Ithaca, NY vs Mercersburg, PA

Highlights

On average, there are 199 sunny days per year in Mercersburg. Ithaca averages 155 sunny days per year. The US average is 205 sunny days.

Mercersburg, Pennsylvania gets 41.1 inches of rain, on average, per year. Ithaca, New York gets 37.4 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Mercersburg averages 28.5 inches of snow per year. Ithaca averages 63.3 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Mercersburg, Pennsylvania
Summer High: the July high is around 85.4 degrees
Winter Low: the January low is 22.4
Rain: averages 41.1 inches of rain a year
Snow: averages 28.5 inches of snow a year

Ithaca, New York
Summer High: the July high is around 80.9 degrees
Winter Low: the January low is 14.7
Rain: averages 37.4 inches of rain a year
Snow: averages 63.3 inches of snow a year

BestPlaces Comfort Index

The annual BestPlaces Comfort Index for Mercersburg is 7.2 (10=best), which means it is one of the most pleasant places in Pennsylvania.

The annual BestPlaces Comfort Index for Ithaca is 6.4 (10=best), which means it is less comfortable than most places in New York.

Today's Weather - Ithaca, NY

46°F

Today's Weather - Mercersburg, PA

53°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Ithaca / Mercersburg

July is the hottest month for Ithaca with an average high temperature of 80.9°, which ranks it as cooler than most places in New York. In Ithaca, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Ithaca are June, August and July.

July is the hottest month for Mercersburg with an average high temperature of 85.4°, which ranks it as warmer than most places in Pennsylvania. In Mercersburg, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Mercersburg are September, June and August.

January has the coldest nighttime temperatures for Ithaca with an average of 14.7°. This is colder than most places in New York.

January has the coldest nighttime temperatures for Mercersburg with an average of 22.4°. This is one of the warmest places in Pennsylvania.

In Ithaca, there are 5.1 days annually when the high temperature is over 90°, which is about average compared to other places in New York.

In Mercersburg, there are 15.4 days annually when the high temperature is over 90°, which is hotter than most places in Pennsylvania.

In Ithaca, there are 145.8 days annually when the nighttime low temperature falls below freezing, which is colder than most places in New York.

In Mercersburg, there are 107.4 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Pennsylvania.

In Ithaca, there are 9.0 days annually when the nighttime low temperature falls below zero°, which is colder than most places in New York.

In Mercersburg, there are 0.7 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Pennsylvania.

June is the wettest month in Ithaca with 4.0 inches of rain, and the driest month is February with 1.9 inches. The wettest season is Autumn with 30% of yearly precipitation and 17% occurs in Spring, which is the driest season. The annual rainfall of 37.4 inches in Ithaca means that it is drier than most places in New York.


May is the wettest month in Mercersburg with 4.1 inches of rain, and the driest month is February with 2.7 inches. The wettest season is Summer with 28% of yearly precipitation and 21% occurs in Spring, which is the driest season. The annual rainfall of 41.1 inches in Mercersburg means that it is drier than most places in Pennsylvania.

January is the rainiest month in Ithaca with 15.2 days of rain, and August is the driest month with only 11.5 rainy days. There are 159.3 rainy days annually in Ithaca, which is rainier than most places in New York. The rainiest season is Spring when it rains 26% of the time and the driest is Autumn with only a 24% chance of a rainy day.

May is the rainiest month in Mercersburg with 12.2 days of rain, and October is the driest month with only 8.4 rainy days. There are 115.7 rainy days annually in Mercersburg, 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.

An annual snowfall of 63.3 inches in Ithaca means that it is snowier than most places in New York.

An annual snowfall of 28.5 inches in Mercersburg means that it is about average compared to other places in Pennsylvania.

January is the snowiest month in Ithaca with 16.7 inches of snow, and 6 months of the year have significant snowfall.

January is the snowiest month in Mercersburg with 8.9 inches of snow, and 6 months of the year have significant snowfall.