Rain, rain, go away. Come again another day.

If the current weather forecast holds, that is bound to be a common refrain for the 40,000 runners taking part in the 40th Broad Street Run on Sunday morning.

Based on the latest National Weather Service forecast, here’s an hour-by-hour outlook of what to expect Sunday morning. (Wheelchairs start at 7:55 a.m., followed by elite athletes and the first wave at 8 a.m. After the first wave, each subsequent wave will start every three to five minutes.)

  • 7 a.m.: Chance of rain 90 percent; temperature 58 degrees.
  • 8 a.m.: Chance of rain 75 percent; temperature 57 degrees.
  • 9 a.m.: Chance of rain 75 percent; temperature 58 degrees.
  • 10 a.m.: Chance of rain 75 percent; temperature 58 degrees.
  • 11 a.m.: Chance of rain 75 percent; temperature 59 degrees.
  • Noon: Chance of rain 75 percent; temperature 60 degrees.

What else to expect

The winds will be from the northeast at about 9 mph during the north-to-south 10-mile run. The projected high for the day is 64 degrees, expected around 4 p.m.

The weather service says rain “could be heavy at times." The rain is expected to give way to cloudy skies later Sunday.

The sun should reappear on Monday, when the high is expected to be about 74.