The Friday before the Indianapolis 500 is Carburetion Day or Carb Day as it has been shortened. Carb Day at the Indianapolis Motor Speedway is the last chance teams have to practice and get their cars ready for the 99th running of the Indianapolis 500.
2015 Indy 500 Weather forecast: Could rain on race day be a problem?
How does the weather look for the 98th running of the Greatest Spectacle in racing? Check out the weather forecast for all the activities at the Indianapolis Motor Speedway and Indianapolis 500.


Weather is not a concern for Indianapolis Friday or Saturday. Picture perfect weather with mostly sunny to sunny skies and temperatures in the lower to middle 70s. As for the 99th running of the Greatest Spectacle in Racing, the Indianapolis 500 on Sunday, there has been some concern for rain but that threat is starting to diminish. I expect Sunday to be mostly dry but the radar will need to be watched during the second half. While the threat is low, there is a chance later in the afternoon of showers or storms popping up.
Please follow me on Twitter @NASCAR_WXMAN and like me on Facebook for the latest weather updates through the weekend for the Greatest Spectacle in Racing.
Conditions in Indianapolis, IN:
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FRIDAY - CARB DAY:
11 a.m. ET
Indy 500 practice – Mostly sunny – temp: 64
12 p.m. ET
Firestone Indy Lights Pre-Race – Mostly sunny – temp: 68
12:30 p.m. ET
Firestone Freedom 100 – Mostly sunny – temp: 69
2 p.m. ET
TAG Heuer Pit Stop Challenge – Mostly sunny – temp: 71
SATURDAY - LEGENDS DAY:
Sunny skies – High: 76
SUNDAY - INDY 500 RACE DAY:
11 a.m. ET
Indianapolis 500 Pre-Race Begins – Mix of clouds and sunshine – temp: 70
12 p.m. ET
Indianapolis 500 – Mix of clouds and sunshine – temp: 73
1 p.m. ET
Indianapolis 500 – Mix of clouds and sunshine, chc of a shower/storm– temp: 76
2 p.m. ET
Indianapolis 500 – Mix of clouds and sunshine, chc of a shower/storm – temp: 78
3 p.m. ET
Indianapolis 500 – Mix of clouds and sunshine, chc of a shower/storm – temp: 80
4 p.m. ET
Indianapolis 500 – Mix of clouds and sunshine, chc of a shower/storm – temp: 80











