Boulder weather in October (Colorado, United States of America)

What can you expect from the weather in Boulder during October? This guide provides all the details you need.

In October, Boulder generally has pleasant temperatures and moderate rainfall. Daytime temperatures hover around 18°C, while nights can cool down to about 4°C.

Boulder in October usually receives moderate rainfall, averaging around 45 mm for the month. Delving into the climate records from the past 30 years, one can predict that nearly 7 days of the month will see rainfall.

The days are predominantly sunny, with an estimated total of around 253 hours of sunshine. This amount of sunlight does not only brightens the days but also contributes to a cheerful ambiance in the area during this month.

Should you favor a climate that's both dry and comfortably warm May, June, August and September typically offer the most agreeable circumstances. On the other hand, December tends to be characterized by conditions that may not be as optimal.

For an in-depth look at the yearly conditions, visit our specialized Boulder climate page with graphs.

 

Boulder, monthly averages in October

Min TemperatureMin Temperature 4°C  
Max TemperatureMax Temperature 18°C  
Chance of RainChance of Rain 24%  
PrecipitationPrecipitation 45 mm  
Rainy daysRainy days 7 days  
HumidityHumidity 49% *  
SunshineSunshine 253 hours *  
Percentage SunshinePercentage Sunshine 72% *  
* Data from: Denver, the United States of America (45 KM, 28 Miles).

Where to go in the United States of America in October

Find out more about the weather in the United States of America in October and which places have the best weather conditions in this month.

Map not visible? Whoops sorry! Please refresh the page.
Legend perfect weather pleasant tolerable unpleasant poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C and 29°C and not too much precipitation (less than 90 mm a month).

So, what should you wear in Boulder in October?

For visitors traveling to Boulder, we recommend wearing layers. So maybe a skirt, t-shirt, shorts for during the day and jeans and a warm jacket for some days and evenings. Bring a rain jacket in case it rains during your stay. Plan on layering your clothes.

What To Do

We rated the following activities from 1 (least suitable) to 10 (best) to do in October.

Cycling
10/10
Walking
10/10
Camping
5/10
Outdoor sports
10/10

Interested in more climate information?

Weather and Climate provides you with all the information you need about the climate in Boulder.

Our site offers climate and forecast data for every country in the world. Are you going to the United States of America? On this website you can find historical weather averages for many cities in the United States of America. Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal climate conditions. Find out where to go with our weather planner.