The 128th Boston Marathon, one of the most celebrated sporting events in the city, is just days away and the weather is looking sunny and warm — peaking in the 60s — for Monday for the tens of thousands of runners set to hit the pavement and the spectators cheering them on.

First, some scattered light to moderate showers will race through Massachusetts Sunday evening, mainly associated with an approaching warm front but they should clear out in time for the first race, the men’s wheelchair contest, at 9:02 a.m. There may be a few puddles in the roadway from Sunday night’s rainfall.

With warm air gradually pushing through the 26.2-mile running route before daybreak, there remains a slight chance for a spot shower to linger just as things kick off. Then conditions really improve.

Here’s a look at weather conditions at the starting line in Hopkinton as the first race gets underway:

Morning

As the Elite Men’s and Women’s races set off shortly after 9:30 a.m., the weather will become beautiful in a hurry with building mild temperatures through the morning — mid- to upper 50s — and cloud cover breaking apart to let the sun shine.

There will continue to be a helpful westerly tail wind of 5 to 10 miles an hour for runners along much of the route.

Noon

By noon, the skies will be mostly clear with the sun drying up any Sunday night puddles along the race route from Hopkinton into Newton. Temperatures will be around 60 degrees while maintaining that helpful tail wind to the runners’ backs.

Elite runners nearing Boston around noon will see temperatures a little cooler, in the upper 50s, with decreasing clouds and mostly sunny skies.

2 to 6 p.m.

The warmest part of the day will be between 2 p.m. and 6 p.m., with thermometers peaking between 60 and 66 degrees. The daytime heating from the sun will also increase wind speeds a bit, reaching 10 to 15 miles an hour, but they will remain from the west.

As you near Boston, temperatures will dip slightly, but you will hardly notice any difference.

Here’s a look at Boston’s finish line forecast throughout the day:

Weekend outlook

Before the marathon, thousands are expected to attend weekend-long festivities during a Fan Fest at City Hall Plaza. Here’s the forecast for the Boston area:

Friday night — Partly cloudy and breezy, with a low around 48.

Saturday — A slight chance of showers before noon then partly sunny, with a high near 56. Breezy, with wind gusts up to 33 miles an hour. Chance of precipitation is 20%. Mostly cloudy at night with a low around 43.

Sunday — Mostly sunny with winds 14 to 17 miles an hour and highs near 61. It will be mostly cloudy with a chance of showers in the evening and overnight.

Check back for the latest Boston Marathon weather updates throughout the weekend and Monday morning.

Ken Mahan can be reached at ken.mahan@globe.com. Follow him on Instagram @kenmahantheweatherman.