Boulder weather in May (Colorado, United States of America)
How is the weather in Boulder in May? Here's what the weather might have in store during this month.
In Boulder the weather in May is generally perfect, characterized by pleasant temperatures and moderate rainfall. Throughout the day, temperatures typically settle at around 21°C. But by evening, they drop to around 6°C.
Boulder in May usually receives moderate rainfall, averaging around 80 mm for the month. Since this is the rainiest month of the year, it's a good idea to carry an umbrella just in case. Typically around 12 days of rainfall is expected.
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% *
Where to go in the United States of America in May
Find out more about the weather in the United States of America in May and which places have the best weather conditions in this month.
perfect weather
pleasant
tolerable
unpleasant
poor
So, what should you wear in Boulder in May?
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 May.
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.
