Chilly conditions but sunny skies are forecast for the 23,000 runners participating in the Baltimore Running Festival on Saturday.
At sunrise, before the 8 a.m. start of the marathon and team relay, temperatures are forecast to hover in the lower 40s, according to the National Weather Service.
By the half-marathon's 9:45 a.m. start, it should be in the mid-50s.
And as finishers start streaming across the finish line by midday into the early afternoon, it should reach the lower 60s.
Perfectly clear skies are expected to make conditions comfortable despite the colder-than-normal temperatures. Normal temperatures for mid-October are between the mid-40s and upper 60s.
Winds are unlikely to slow runners down, or provide any push, with only slight breezes of about 5 mph coming from the southwest.
Not sure what to wear in those conditions? Runner's World has a tool to help you figure it out.