2024 Compare Climate & Weather:
Castle Rock, CO vs Ann Arbor, MI
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Highlights
On average, there are 178 sunny days per year in Ann Arbor. Castle Rock averages 243 sunny days per year. The US average is 205 sunny days.
Ann Arbor, Michigan gets 36 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.
Ann Arbor averages 43 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
Ann Arbor, Michigan
Summer High: the July high is around 82.8 degrees
Winter Low: the January low is 16.5
Rain: averages 36 inches of rain a year
Snow: averages 43 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
Ann ArborThe annual BestPlaces Comfort Index for Ann Arbor is 6.7 (10=best), which means it is more comfortable than most places in Michigan.
6.7 / 10
August, July and June are the most pleasant months in Ann Arbor, while January and December 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
1 AM PST
Chance Showers And Thunderstorms
44°F
| DAY | DESCRIPTION | HIGH / LOW | WIND |
|---|
| Overnight | Chance Showers And Thunderstorms | 42° / 64° | W 7 mph |
| Friday Night | Showers And Thunderstorms | 40° / 46° | WNW 5 to 10 mph |
| Saturday Night | Showers And Thunderstorms then Rain And Snow Showers Likely | 36° / 52° | NNW 12 to 17 mph |
| Sunday Night | Chance Showers And Thunderstorms then Partly Cloudy | 36° / 63° | SSW 10 mph |
| Monday Night | Partly Cloudy | 41° / 70° | SSW 10 mph |
| Tuesday Night | Partly Cloudy | 44° / 70° | S 8 to 12 mph |
| Wednesday Night | Slight Chance Showers And Thunderstorms then Partly Cloudy | 47° / 74° | S 13 mph |
Today's Weather - Ann Arbor, MI
1 AM PST
Widespread Frost
35°F
| DAY | DESCRIPTION | HIGH / LOW | WIND |
|---|
| Overnight | Widespread Frost | 33° / 64° | E 6 mph |
| Friday Night | Showers And Thunderstorms | 53° / 76° | SE 9 to 13 mph |
| Saturday Night | Chance Showers And Thunderstorms | 63° / 79° | SW 15 to 21 mph |
| Sunday Night | Chance Showers And Thunderstorms | 62° / 78° | SSW 14 to 18 mph |
| Monday Night | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 55° / 70° | SW 12 to 20 mph |
| Tuesday Night | Slight Chance Rain Showers then Mostly Clear | 50° / 75° | WSW 9 to 13 mph |
| Wednesday Night | Slight Chance Showers And Thunderstorms | 51° / 72° | WNW 13 to 16 mph |
Average Monthly High / Low (°F)
| Month | Castle Rock, CO | Ann Arbor, MI |
|---|
| January | 45° / 19° | 31° / 17° |
| February | 46° / 20° | 35° / 18° |
| March | 53° / 26° | 45° / 26° |
| April | 60° / 32° | 59° / 36° |
| May | 69° / 41° | 70° / 47° |
| June | 79° / 50° | 79° / 56° |
| July | 86° / 56° | 83° / 61° |
| August | 83° / 55° | 81° / 59° |
| September | 76° / 47° | 74° / 51° |
| October | 65° / 36° | 61° / 40° |
| November | 52° / 26° | 48° / 31° |
| December | 44° / 18° | 35° / 22° |
Hot, Freezing, Rainy, Snowy Days: Castle Rock / Ann Arbor
| Month | Hot Days | Freezing Days | Rainy Days | Snowy Days |
|---|
| January | 0 / 0 | 29 / 29 | 3 / 14 | 4 / 10 |
| February | 0 / 0 | 25 / 26 | 4 / 11 | 4 / 8 |
| March | 0 / 0 | 23 / 25 | 6 / 11 | 5 / 5 |
| April | 0 / 0 | 15 / 9 | 6 / 12 | 4 / 1 |
| May | 0 / 0 | 3 / 1 | 9 / 12 | 1 / 0 |
| June | 2 / 1 | 0 / 0 | 8 / 11 | 0 / 0 |
| July | 8 / 3 | 0 / 0 | 8 / 10 | 0 / 0 |
| August | 4 / 1 | 0 / 0 | 10 / 10 | 0 / 0 |
| September | 1 / 0 | 1 / 0 | 6 / 10 | 0 / 0 |
| October | 0 / 0 | 10 / 6 | 4 / 11 | 1 / 0 |
| November | 0 / 0 | 22 / 16 | 4 / 12 | 4 / 2 |
| December | 0 / 0 | 28 / 28 | 4 / 14 | 4 / 8 |
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 Ann Arbor with an average high temperature of 82.8°, which ranks it as warmer than most places in Michigan. In Ann Arbor, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Ann Arbor are June, August and September.
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 Ann Arbor with an average of 16.5°. This is warmer than most places in Michigan.
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 Ann Arbor, there are 5.8 days annually when the high temperature is over 90°, which is about average compared to other places in Michigan.
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 Ann Arbor, there are 140.9 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Michigan.
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 Ann Arbor, there are 3.9 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Michigan.
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 Ann Arbor with 3.7 inches of rain, and the driest month is February with 2.2 inches. The wettest season is Autumn with 30% of yearly precipitation and 20% occurs in Spring, which is the driest season. The annual rainfall of 36.0 inches in Ann Arbor means that it is wetter than most places in Michigan.
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.
December is the rainiest month in Ann Arbor with 13.9 days of rain, and September is the driest month with only 9.6 rainy days. There are 136.9 rainy days annually in Ann Arbor, which is rainier than most places in Michigan. The rainiest season is Spring when it rains 28% of the time and the driest is Autumn with only a 23% 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 43.0 inches in Ann Arbor means that it is less snowy than most places in Michigan.
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 Ann Arbor with 12.4 inches of snow, and 6 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 Ann Arbor 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 Ann Arbor
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