2024 Compare Climate & Weather:
Castle Rock, CO vs Anchorage, AK
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Highlights
On average, there are 126 sunny days per year in Anchorage. Castle Rock averages 243 sunny days per year. The US average is 205 sunny days.
Anchorage, Alaska gets 17.3 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.
Anchorage averages 78.8 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
Anchorage, Alaska
Summer High: the July high is around 67 degrees
Winter Low: the January low is 8.6
Rain: averages 17.3 inches of rain a year
Snow: averages 78.8 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
AnchorageThe annual BestPlaces Comfort Index for Anchorage is 5.5 (10=best), which means it is more comfortable than most places in Alaska.
5.5 / 10
July, June and August are the most pleasant months in Anchorage, while December and January are the least comfortable months.
Castle RockThe 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.
Today's Weather - Castle Rock, CO
11 AM PST
Slight Chance Showers And Thunderstorms
76°F
| DAY | DESCRIPTION | HIGH / LOW | WIND |
|---|
| This Afternoon | Slight Chance Showers And Thunderstorms | 81° / 57° | E 7 mph |
| Wednesday | Sunny | 89° / 60° | WNW 5 to 8 mph |
| Thursday | Sunny then Slight Chance Showers And Thunderstorms | 91° / 59° | NW 5 to 8 mph |
| Friday | Mostly Sunny then Chance Showers And Thunderstorms | 84° / 55° | S 5 to 9 mph |
| Saturday | Mostly Sunny then Chance Showers And Thunderstorms | 82° / 58° | WNW 8 mph |
| Sunday | Sunny then Slight Chance Showers And Thunderstorms | 89° / 57° | SW 8 mph |
| Monday | Sunny then Slight Chance Showers And Thunderstorms | 86° / 55° | SW 7 to 10 mph |
Average Monthly High / Low (°F)
| Month | Castle Rock, CO | Anchorage, AK |
|---|
| January | 45° / 19° | 23° / 9° |
| February | 46° / 20° | 27° / 11° |
| March | 53° / 26° | 35° / 17° |
| April | 60° / 32° | 46° / 28° |
| May | 69° / 41° | 58° / 38° |
| June | 79° / 50° | 65° / 47° |
| July | 86° / 56° | 67° / 51° |
| August | 83° / 55° | 65° / 49° |
| September | 76° / 47° | 56° / 41° |
| October | 65° / 36° | 41° / 28° |
| November | 52° / 26° | 28° / 15° |
| December | 44° / 18° | 24° / 11° |
Hot, Freezing, Rainy, Snowy Days: Castle Rock / Anchorage
| Month | Hot Days | Freezing Days | Rainy Days | Snowy Days |
|---|
| January | 0 / 0 | 29 / 31 | 3 / 8 | 4 / 8 |
| February | 0 / 0 | 25 / 27 | 4 / 7 | 4 / 7 |
| March | 0 / 0 | 23 / 29 | 6 / 6 | 5 / 6 |
| April | 0 / 0 | 15 / 21 | 6 / 5 | 4 / 3 |
| May | 0 / 0 | 3 / 5 | 9 / 7 | 1 / 0 |
| June | 2 / 0 | 0 / 0 | 8 / 9 | 0 / 0 |
| July | 8 / 0 | 0 / 0 | 8 / 12 | 0 / 0 |
| August | 4 / 0 | 0 / 0 | 10 / 14 | 0 / 0 |
| September | 1 / 0 | 1 / 4 | 6 / 14 | 0 / 0 |
| October | 0 / 0 | 10 / 21 | 4 / 12 | 1 / 4 |
| November | 0 / 0 | 22 / 28 | 4 / 9 | 4 / 8 |
| December | 0 / 0 | 28 / 30 | 4 / 10 | 4 / 11 |
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 Anchorage with an average high temperature of 67.0°, which ranks it as warmer than most places in Alaska. In Anchorage, there are 0 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Anchorage are July, June and August.
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 Anchorage with an average of 8.6°. This is about average compared to other places in Alaska.
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 Anchorage, there are 0.0 days annually when the high temperature is over 90°, which is about average compared to other places in Alaska.
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 Anchorage, there are 196.5 days annually when the nighttime low temperature falls below freezing, which is about average compared to other places in Alaska.
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 Anchorage, there are 27.4 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Alaska.
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.
August is the wettest month in Anchorage with 3.0 inches of rain, and the driest month is April with 0.5 inches. The wettest season is Autumn with 35% of yearly precipitation and 11% occurs in Summer, which is the driest season. The annual rainfall of 17.3 inches in Anchorage means that it is about average compared to other places in Alaska.
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.
August is the rainiest month in Anchorage with 14.4 days of rain, and April is the driest month with only 4.7 rainy days. There are 111.8 rainy days annually in Anchorage, which is less rainy than most places in Alaska. The rainiest season is Autumn when it rains 31% of the time and the driest is Summer with only a 16% 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 78.8 inches in Anchorage means that it is snowier than most places in Alaska.
March is the snowiest month in Castle Rock with 16.8 inches of snow, and 9 months of the year have significant snowfall.
December is the snowiest month in Anchorage with 17.8 inches of snow, and 7 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 Castle Rock 
2 Reviews
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
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
Start Your Review of Castle Rock
Reviews for Anchorage 2 Reviews
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
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
Start Your Review of Anchorage
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