2025 Compare Climate & Weather:
Castle Rock, CO vs Ithaca, NY

Highlights

On average, there are 155 sunny days per year in Ithaca. Castle Rock averages 243 sunny days per year. The US average is 205 sunny days.

Ithaca, New York gets 37.4 inches of rain, on average, per year. Castle Rock, Colorado gets 18.6 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Ithaca averages 63.3 inches of snow per year. Castle Rock averages 78.3 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

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

Castle Rock, Colorado
Summer High: the July high is around 85.5 degrees
Winter Low: the January low is 18.6
Rain: averages 18.6 inches of rain a year
Snow: averages 78.3 inches of snow a year

BestPlaces Comfort Index

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

The annual BestPlaces Comfort Index for Castle Rock is 7.2 (10=best), which means it is more comfortable than most places in Colorado.

Today's Weather - Castle Rock, CO

66°F

Today's Weather - Ithaca, NY

53°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Castle Rock / Ithaca

July is the hottest month for Castle Rock with an average high temperature of 85.5°, which ranks it as about average compared to other places in Colorado. In Castle Rock, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Castle Rock are June, September and August.

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.

December has the coldest nighttime temperatures for Castle Rock with an average of 18.1°. This is one of the warmest places in Colorado.

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

In Castle Rock, there are 14.9 days annually when the high temperature is over 90°, which is cooler than most places in Colorado.

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 Castle Rock, there are 156.4 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Colorado.

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 Castle Rock, there are 5.6 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Colorado.

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.

August is the wettest month in Castle Rock with 2.6 inches of rain, and the driest month is January with 0.6 inches. The wettest season is Autumn with 40% of yearly precipitation and 10% occurs in Spring, which is the driest season. The annual rainfall of 18.6 inches in Castle Rock means that it is wetter than most places in Colorado.


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.

August is the rainiest month in Castle Rock with 9.9 days of rain, and January is the driest month with only 3.3 rainy days. There are 70.0 rainy days annually in Castle Rock, which is less rainy than most places in Colorado. The rainiest season is Autumn when it rains 37% of the time and the driest is Spring with only a 15% chance of a rainy day.

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.

An annual snowfall of 78.3 inches in Castle Rock means that it is snowier than most places in Colorado.

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

March is the snowiest month in Castle Rock with 16.8 inches of snow, and 9 months of the year have significant snowfall.

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