Runners will face a temperature range from 52°F at the start to 58°F at finish, with light humidity at 49% and a dew point of 43°F. Wind will be light, coming from the SSE, with no significant impact on pace. No rain is expected, so hydration should be maintained without the need for excessive gear.
Race day forecast available in 187 days
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About the BOLDERBoulder
The Bolder Boulder (styled as BOLDERBoulder and previously BolderBOULDER) is an annual 10-kilometer run in Boulder, Colorado. The most recent race featured over 54,000 runners, walkers, and wheelchair racers, making it the second largest 10k race in the US and the fifth largest road race in the world. It has one of the largest non-marathon prize purses in road racing.Wikipedia
The 2027 BOLDERBoulder will be held on Monday May 31, 2027.
What will the weather be like for the 2027 BOLDERBoulder?
The forecast calls for a high of 79°F and a low of 51°F with a 7% chance of rain.
What is the weather usually like for the BOLDERBoulder?
Over the 26 years racecast.io has race-day weather for (2000 to 2026), it averaged 48°F at the start and 50°F by a typical finish. It has not rained during race hours in any of those years.
What was the hottest BOLDERBoulder?
Of the 26 years on record, 2003 was the warmest, reaching 67°F during race hours. The coldest start was 2004, at 32°F.
What was the windiest BOLDERBoulder?
Of the 26 years on record, 2004 was the windiest, with wind averaging 13 mph during race hours. The calmest was 2023, at 0 mph.
BOLDERBoulder weather history
Based on 26 years of data
Avg Temp
49°F
L:47° H:50°
RunScore
Conditions
Rain Freq
0%
0 of 26 yrs
Wind4mph
Dew40°F
Temperature History
Range of temperatures during race hours for each year.
