This marathon weekend brings favorable weather for experienced runners, but some participants and spectators might find it more challenging to stay warm.

As 34,000 people get ready to take over city streets for the Philadelphia half-marathon on Saturday and marathon on Sunday, rain is predicted to gather its clouds for a possible short appearance Friday. According to the National Weather Service in Mount Holly, Friday evening’s precipitation has a 15% chance of carrying into Saturday morning.

But worry not. Meteorologist Amanda Lee said the rain should be dying out by the time the 13.1-mile half-marathon begins, at 7 a.m.

Even without rain, prepare for cloudy skies, gusty winds — 20 to 25 miles per hour Saturday morning with a spike to 30 mph around the evening — and race-time temperatures in the low 50s that are unlikely to rise much during the day. “That’s around the warmest it’s going to be,” Lee said.