2024 Compare Climate & Weather:
Boulder, CO vs Portland, ME
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Highlights
On average, there are 203 sunny days per year in Portland. Boulder averages 245 sunny days per year. The US average is 205 sunny days.
Portland, Maine gets 48.9 inches of rain, on average, per year. Boulder, Colorado gets 18.1 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.
Portland averages 61 inches of snow per year. Boulder averages 71.1 inches of snow per year. The US average is 27.8 inches of snow per year.
Weather Highlights
Portland, Maine
Summer High: the July high is around 78.8 degrees
Winter Low: the January low is 10.8
Rain: averages 48.9 inches of rain a year
Snow: averages 61 inches of snow a year
Boulder, Colorado
Summer High: the July high is around 88.1 degrees
Winter Low: the January low is 18.9
Rain: averages 18.1 inches of rain a year
Snow: averages 71.1 inches of snow a year
BESTPLACES COMFORT INDEX
PortlandThe annual BestPlaces Comfort Index for Portland is 6.5 (10=best), which means it is more comfortable than most places in Maine.
6.5 / 10
August, July and June are the most pleasant months in Portland, while January and February are the least comfortable months.
BoulderThe annual BestPlaces Comfort Index for Boulder is 7.1 (10=best), which means it is about average compared to other places in Colorado.
7.1 / 10
September, June and August are the most pleasant months in Boulder, while December and January are the least comfortable months.
Today's Weather - Boulder, CO
6 PM PST
Partly Cloudy
70°F
| DAY | DESCRIPTION | HIGH / LOW | WIND |
|---|
| Tonight | Partly Cloudy | 48° / 74° | WNW 7 mph |
| Thursday Night | Chance Showers And Thunderstorms | 47° / 65° | W 10 to 17 mph |
| Friday Night | Showers And Thunderstorms | 43° / 52° | NNW 2 to 10 mph |
| Saturday Night | Showers And Thunderstorms | 41° / 58° | N 10 mph |
| Sunday Night | Slight Chance Showers And Thunderstorms then Partly Cloudy | 39° / 68° | W 9 mph |
| Monday Night | Mostly Clear | 44° / 75° | W 10 mph |
| Tuesday Night | Partly Cloudy | 48° / 78° | NW 9 mph |
Today's Weather - Portland, ME
6 PM PST
Clear
40°F
| DAY | DESCRIPTION | HIGH / LOW | WIND |
|---|
| Tonight | Clear | 33° / 42° | NW 15 to 20 mph |
| Thursday Night | Clear | 34° / 50° | W 5 to 20 mph |
| Friday Night | Mostly Clear | 41° / 52° | SW 5 to 10 mph |
| Saturday Night | Mostly Cloudy then Slight Chance Rain Showers | 45° / 54° | S 10 to 15 mph |
| Sunday Night | Slight Chance Rain Showers | 49° / 57° | W 5 to 10 mph |
| Monday Night | Mostly Cloudy then Slight Chance Rain Showers | 49° / 54° | SE 5 to 10 mph |
| Tuesday Night | Chance Rain Showers | 49° / 56° | S 10 mph |
Average Monthly High / Low (°F)
| Month | Boulder, CO | Portland, ME |
|---|
| January | 47° / 19° | 31° / 11° |
| February | 48° / 20° | 34° / 14° |
| March | 55° / 27° | 42° / 23° |
| April | 62° / 34° | 54° / 33° |
| May | 72° / 43° | 64° / 43° |
| June | 82° / 51° | 73° / 53° |
| July | 88° / 57° | 79° / 58° |
| August | 86° / 55° | 78° / 57° |
| September | 78° / 46° | 70° / 49° |
| October | 66° / 36° | 59° / 37° |
| November | 54° / 26° | 48° / 29° |
| December | 45° / 18° | 37° / 18° |
Hot, Freezing, Rainy, Snowy Days: Boulder / Portland
| Month | Hot Days | Freezing Days | Rainy Days | Snowy Days |
|---|
| January | 0 / 0 | 28 / 30 | 5 / 11 | 5 / 8 |
| February | 0 / 0 | 25 / 26 | 5 / 9 | 5 / 6 |
| March | 0 / 0 | 23 / 26 | 7 / 11 | 6 / 5 |
| April | 0 / 0 | 13 / 13 | 9 / 11 | 4 / 1 |
| May | 1 / 0 | 2 / 2 | 11 / 12 | 1 / 0 |
| June | 6 / 1 | 0 / 0 | 9 / 12 | 0 / 0 |
| July | 14 / 2 | 0 / 0 | 9 / 11 | 0 / 0 |
| August | 9 / 1 | 0 / 0 | 10 / 9 | 0 / 0 |
| September | 3 / 0 | 1 / 1 | 7 / 9 | 0 / 0 |
| October | 0 / 0 | 10 / 9 | 6 / 10 | 2 / 0 |
| November | 0 / 0 | 22 / 20 | 5 / 11 | 4 / 1 |
| December | 0 / 0 | 28 / 28 | 5 / 11 | 5 / 6 |
July is the hottest month for Boulder with an average high temperature of 88.1°, which ranks it as about average compared to other places in Colorado. In Boulder, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Boulder are September, June and May.
July is the hottest month for Portland with an average high temperature of 78.8°, which ranks it as about average compared to other places in Maine. In Portland, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Portland are August, July and June.
December has the coldest nighttime temperatures for Boulder with an average of 18.3°. This is one of the warmest places in Colorado.
January has the coldest nighttime temperatures for Portland with an average of 10.8°. This is warmer than most places in Maine.
In Boulder, there are 32.4 days annually when the high temperature is over 90°, which is about average compared to other places in Colorado.
In Portland, there are 3.8 days annually when the high temperature is over 90°, which is hotter than most places in Maine.
In Boulder, there are 151.2 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Colorado.
In Portland, there are 154.5 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Maine.
In Boulder, there are 5.5 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Colorado.
In Portland, there are 12.2 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Maine.
May is the wettest month in Boulder with 2.5 inches of rain, and the driest month is January with 0.6 inches. The wettest season is Summer with 37% of yearly precipitation and 11% occurs in Spring, which is the driest season. The annual rainfall of 18.1 inches in Boulder means that it is wetter than most places in Colorado.
November is the wettest month in Portland with 5.0 inches of rain, and the driest month is August with 3.3 inches. The wettest season is Winter with 28% of yearly precipitation and 22% occurs in Spring, which is the driest season. The annual rainfall of 48.9 inches in Portland means that it is about average compared to other places in Maine.
May is the rainiest month in Boulder with 10.5 days of rain, and January is the driest month with only 4.7 rainy days. There are 88.0 rainy days annually in Boulder, which is rainier than most places in Colorado. The rainiest season is Autumn when it rains 31% of the time and the driest is Spring with only a 17% chance of a rainy day.
May is the rainiest month in Portland with 12.4 days of rain, and February is the driest month with only 9.2 rainy days. There are 128.3 rainy days annually in Portland, which is about average compared to other places in Maine. The rainiest season is Summer when it rains 27% of the time and the driest is Spring with only a 24% chance of a rainy day.
An annual snowfall of 71.1 inches in Boulder means that it is snowier than most places in Colorado.
An annual snowfall of 61.0 inches in Portland means that it is less snowy than most places in Maine.
March is the snowiest month in Boulder with 14.3 inches of snow, and 9 months of the year have significant snowfall.
January is the snowiest month in Portland with 18.1 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 Boulder 
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 Boulder
Reviews for Portland 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 Portland
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