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

How is May weather typically in Boulder? Check out our in-depth weather guide for this month.

Temperatures

Experience perfect weather in Boulder in May, characterized by pleasant temperatures and moderate rainfall. You can expect daytime temperatures to reach around 21°C, while the nights will see a decline to about 6°C.

Precipitation

Boulder in May usually receives moderate rainfall, averaging around 80 mm for the month. As the month with the highest rainfall, make sure to have an umbrella to manage the showers. Expect around 12 days of rain based on historical data.

Average sunshine

The city usually sees around 290 hours of sunlight, indicating many sunny days.

If you're a fan of comfortable temperatures and drier conditions, May is a great time to visit. May, June, August and September generally stand out with the best circumstances. While December tends to showcase less optimal conditions.

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

 

Boulder, monthly averages in May

Min Temperature 6°C  

Max Temperature 21°C  

Chance of Rain 41%  

Precipitation 80 mm  

Rainy days 12 days  

Humidity 51% *  

Sunshine 290 hours *  

Percentage Sunshine 65% *  

Data from: Denver, the United States of America (45 KM, 28 Miles).

Where to go in the United States of America in May

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

Weather conditions Weather

Temperatures

Precipitation

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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 this month?

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.

Cycling

9/10

Walking

9/10

Barbeque

8/10

Camping

4/10

Outdoor sports

9/10

Interested in more climate information?

This site 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 travel conditions. Find out where to go with our weather planner.