Indy 500 weather forecasts remain cloudy but rain looking likely

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Race fans are rounding the mid-week bend and entering the home stretch as the Indy 500 draws near. The week leading up to the Big Race at Indianapolis Motor Speedway has turned wet and gray, but theoretically there's still plenty of time before the race for the clouds to clear.But will they?

IndyStar is helping race fans prepare their outfits and accessories for the spectacle by publishing daily updates as race day draws near.

IndyStar's historic weather analysis (provided below) shows that it's rained only once on May 24 since 2006 and the average temperature for the past 20 years has been in the upper 60s. That said, multiple current forecasts call for some precipitation this year on Sunday, May 24.

What will weather be like for the Indy 500?​


The National Weather Service on Wednesday is predicting a 60% chance of rain for Sunday's race. Showers are likely throughout the day and there's a possibility of a thunderstorm after 2 p.m. Skies will be mostly cloudy, according to NWS's latest report, and temperatures will hit a high of around 81 degrees.

AccuWeather forecasters increased their prediction to an 85% chance of rain and a 21% chance of thunderstorms for some time Sunday. The meteorologists there predict less than a quarter inch of rain for the day falling for two hours throughout the day. High temperatures will be in the mid 70s.

The Weather Underground is calling for a 42% chance of rain and its hour-by-hour forecast predicts rains will hold off until 2 p.m. Scattered thunderstorms are expected in the afternoon with a brief dry window around 4 p.m. Highs will be in the mid 70s.

What is the weather forecast for Memorial Day if there's a delay?​


The National Weather Service is predicting a 50% chance of rain and thunderstorms for Memorial Day with mostly cloudy skies and a high around 80 degrees.

Weather Underground shows a 24% chance of rain for Monday, May 25, with temperatures reaching the high 70s.

What will weather be like for Legends Day?​


This year's Indy 500 Legends Day takes place Saturday, May 23, at the Indianapolis Motor Speedway.

The National Weather Service forecast predicts a 60% chance of rain with thunderstorms rolling in around 8 a.m. Temperatures will be warm with highs nearing 80 degrees.

What will weather be like for Carb Day?​


This year's Indy 500 Carb Day is on Friday, May 22. The day-long party includes the Oscar Mayer Wienie 500 and the Pit Stop Competition.

The National Weather Service forecast gives a 90% chance of rain Friday with potential thunderstorms around 2 p.m. Rainfall totals could be between a quarter and half an inch. Temperatures will be in the low 70s.

Indy 500 weather history​


IndyStar analyzed 20 years of historic data from Weather Underground for May 24, this year's Race Day.

Daily temperatures averaged in the high 60s and it has rained only one day out of the last 20 since 2006. Precipitation totals on rainy days were light, with the highest on record at only one-tenth of an inch.



On previous race days, temperatures varied wildly from a high of 92 degrees in 1937 and a low of 37 degrees in 1947, according to the National Weather Service.

The most rain fell on May 30, 2004, when Race Day was inundated with nearly 4 inches of precipitation. The race eventually ran but was cut short due to a tornado in the area.

Karl Schneider is an IndyStar environment reporter. You can reach him at [email protected]. Follow him on Twitter @karlstartswithk

IndyStar's environmental reporting project is made possible through the generous support of the nonprofit Nina Mason Pulliam Charitable Trust.

This article originally appeared on Indianapolis Star: Indy 500 weather forecasts remain cloudy and full of rain


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