2025 Compare Climate & Weather:
St. George, UT vs Castle Rock, CO

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Highlights

On average, there are 243 sunny days per year in Castle Rock. St. George averages 255 sunny days per year. The US average is 205 sunny days.

Castle Rock, Colorado gets 18.6 inches of rain, on average, per year. St. George, Utah gets 10 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Castle Rock averages 78.3 inches of snow per year. St. George averages 1.5 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

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

St. George, Utah
Summer High: the July high is around 101.2 degrees
Winter Low: the January low is 28.9
Rain: averages 10 inches of rain a year
Snow: averages 1.5 inches of snow a year

BestPlaces Comfort Index
Castle Rock

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

7.2 / 10
August, September and July are the most pleasant months in Castle Rock, while December and January are the least comfortable months.

St. George

The annual BestPlaces Comfort Index for St. George is 7.5 (10=best), which means it is one of the most pleasant places in Utah.

7.5 / 10
April, October and May are the most pleasant months in St. George, while July and August are the least comfortable months.

Today's Weather - St. George, UT

2 PM PST

Showers And Thunderstorms Likely

72°F

DAYDESCRIPTIONHIGH / LOWWIND
This AfternoonShowers And Thunderstorms Likely74° / 55°N 5 mph
MondayShowers And Thunderstorms66° / 54°W 1 to 5 mph
TuesdayChance Rain Showers73° / 53°SW 5 mph
WednesdaySunny78° / 57°NW 2 mph
ThursdaySunny86° / 62°SW 2 mph
FridaySunny92° / 65°E 2 mph
SaturdaySunny95° / 67°ESE 3 mph
Today's Weather - Castle Rock, CO

2 PM PST

Chance Showers And Thunderstorms

71°F

DAYDESCRIPTIONHIGH / LOWWIND
This AfternoonChance Showers And Thunderstorms71° / 44°SSE 18 to 22 mph
MondayShowers And Thunderstorms56° / 40°SSE 15 to 20 mph
TuesdayRain Showers51° / 36°ENE 3 to 10 mph
WednesdayRain Showers52° / 36°NNE 6 mph
ThursdayMostly Sunny then Chance Rain Showers62° / 41°SE 5 mph
FridayMostly Sunny then Chance Rain Showers69° / 44°NW 5 to 8 mph
SaturdayMostly Sunny then Chance Rain Showers72° / 47°SSE 3 to 7 mph
Average Monthly High / Low (°F)
MonthSt. George, UTCastle Rock, CO
January55° / 29°45° / 19°
February60° / 33°46° / 20°
March68° / 39°53° / 26°
April76° / 45°60° / 32°
May86° / 54°69° / 41°
June96° / 61°79° / 50°
July101° / 68°86° / 56°
August99° / 67°83° / 55°
September92° / 58°76° / 47°
October78° / 46°65° / 36°
November64° / 35°52° / 26°
December54° / 28°44° / 18°
Hot, Freezing, Rainy, Snowy Days: St. George / Castle Rock
MonthHot DaysFreezing DaysRainy DaysSnowy Days
January0 / 021 / 295 / 30 / 4
February0 / 012 / 256 / 40 / 4
March0 / 06 / 235 / 60 / 5
April2 / 02 / 153 / 60 / 4
May11 / 00 / 32 / 90 / 1
June25 / 20 / 01 / 80 / 0
July30 / 80 / 03 / 80 / 0
August30 / 40 / 03 / 100 / 0
September19 / 10 / 13 / 60 / 0
October2 / 02 / 104 / 40 / 1
November0 / 011 / 223 / 40 / 4
December0 / 022 / 284 / 40 / 4
July is the hottest month for St. George with an average high temperature of 101.2°, which ranks it as one of the hottest places in Utah. In St. George, there are 2 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for St. George are October, April and May.

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.
December has the coldest nighttime temperatures for St. George with an average of 28.1°. This is one of the warmest places in Utah.

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

In St. George, there are 118.3 days annually when the high temperature is over 90°, which is one of the hottest places in Utah.

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 St. George, there are 76.5 days annually when the nighttime low temperature falls below freezing, which is one of the warmest places in Utah.

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 St. George, there are 0.0 days annually when the nighttime low temperature falls below zero°, which is one of the warmest places in Utah.

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.

February is the wettest month in St. George with 1.5 inches of rain, and the driest month is June with 0.2 inches. The wettest season is Spring with 39% of yearly precipitation and 16% occurs in Autumn, which is the driest season. The annual rainfall of 10.0 inches in St. George means that it is drier than most places in Utah.


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.

February is the rainiest month in St. George with 5.9 days of rain, and June is the driest month with only 1.4 rainy days. There are 42.6 rainy days annually in St. George, which is one of the least rainy places in Utah. The rainiest season is Spring when it rains 35% of the time and the driest is Autumn with only a 18% chance of a rainy day.

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.

An annual snowfall of 1.5 inches in St. George means that it is one of the least snowy places in Utah.

An annual snowfall of 78.3 inches in Castle Rock means that it is snowier than most places in Colorado.
January is the snowiest month in St. George with 0.5 inches of snow, and 1 month of the year have significant snowfall.

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

DID YOU KNOW?

Many people confuse Weather and Climate, but they are different. Weather refers to the conditions of the atmosphere over a short period of time, while Climate refers to the conditions of the atmosphere over a long period of time.

Weather, more specifically, refers to how the atmosphere behaves and its effects on life and human activities. Most people think of Weather in terms of what can be observed: temperature, humidity, precipitation, and cloudy/sunny conditions. Weather conditions constantly change on a minute-to-minute basis.

Climate is a record of the average weather conditions for a given place over a long period of time, often referred to as Climate Normals. A 30-year period of record is a common requirement to be considered a Climate Normal.

Reviews for St. George    2 Reviews
Jill · Sherman Oaks, CA
re:
Over 16 years ago

Hi. I'd like to know if you still feel the same way about living in Broomfield. I went there this past July to check it out (along with Lafayette, Boulder (can't  More

   |    Reply
NC For Me · Apex, NC
re:
Over 16 years ago

Apex is perfect for what you are looking for. It's close enough to Raleigh, Durham, Chapel Hill to find a job and Cary the next town over, is a little more expensive but  More

   |    Reply

Start Your Review of St. George

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Reviews for Castle Rock    2 Reviews
Jill · Sherman Oaks, CA
re:
Over 16 years ago

Hi. I'd like to know if you still feel the same way about living in Broomfield. I went there this past July to check it out (along with Lafayette, Boulder (can't  More

   |    Reply
NC For Me · Apex, NC
re:
Over 16 years ago

Apex is perfect for what you are looking for. It's close enough to Raleigh, Durham, Chapel Hill to find a job and Cary the next town over, is a little more expensive but  More

   |    Reply

Start Your Review of Castle Rock

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Zips In St. George, Utah
84790, 84770
Zips In CASTLE ROCK, COLORADO
80104, 80109
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