Key takeaways
- Oval rain epidemic: Four out of five oval tracks on the 2026 IndyCar schedule — Indianapolis, St. Louis, Nashville, and Milwaukee — were disrupted by rain.
- Phoenix stays dry: The Phoenix Grand Prix in the Arizona desert was the only oval weekend unaffected by wet weather in 2026.
- Scheduling lessons: Long delays at St. Louis and tight double-header windows at Milwaukee highlight the need for greater schedule flexibility in 2027.
Milwaukee Mile Race 1 became the latest casualty of wet weather in 2026, failing to reach its full 250-lap distance on Saturday after persistent downpours brought out a red flag on Lap 91.
With rain impacting four of the five oval events on the 2026 IndyCar Series calendar, the category finds itself navigating a mix of bad luck, high-stakes broadcasting bets, and a rigid schedule that leaves little room to adapt when the skies open. Only the Phoenix Grand Prix in Arizona escaped without weather disruptions.
The rain issues began during qualifying for the Indianapolis 500, where Saturday track activity was wiped out completely, forcing a condensed schedule on Sunday. While the race itself was completed following minor light-drizzle delays — culminating in an epic battle between Felix Rosenqvist and David Malukas — the lost track time reduced overall media exposure for IndyCar’s flagship event.
At World Wide Technology Raceway in St. Louis, a lack of flexibility prolonged the event into the early hours of Monday morning. Scheduled for Sunday evening despite clear earlier weather windows, the race suffered lengthy rain stoppages that drained drivers and crew members who were already navigating a grueling five-race stretch.
In Nashville, IndyCar took a calculated risk by scheduling green flag time immediately after the FIFA World Cup final on Fox. Although heavy rain ultimately postponed the race to Monday, the extended waiting window still averaged nearly 3 million viewers — placing it behind only the Indy 500 and the Washington GP in seasonal viewership.
IndyCar officials made the call to delay the remainder of Saturday’s red-flagged Race 1 at Milwaukee, electing to prioritize IndyCar delaying the Milwaukee Race 1 restart until after Race 2.
Before the downpour at Milwaukee, fans were treated to an intense duel between Pato O’Ward and Felix Rosenqvist, alongside sharp tire degradation strategies that reshuffled the order. With a far shorter calendar than NASCAR, IndyCar cannot control the weather, but as the series plans its 2027 schedule, adopting wider event windows and contingency strategies will be crucial to safeguarding track action.
Coverage continues across all sessions on our news page.
2026 IndyCar Series Oval Weather Disruptions
| Round / Event | Track | Weather Impact | Outcome |
| Phoenix GP | Phoenix Raceway | None | Completed as scheduled |
| 110th Indianapolis 500 | Indianapolis Motor Speedway | Saturday qualifying rained out; light drizzle during race | Format compressed to Sunday; full 500 miles completed |
| Bommarito 500 | WWTR (St. Louis) | Heavy evening rainfall | Extended delays; finished in early Monday morning hours |
| Big Machine Music City GP | Nashville Superspeedway | Torrential downpours | Postponed to Monday afternoon |
| Milwaukee Mile (Race 1) | Milwaukee Mile | Persistent rain on Lap 91 | Red-flagged; continuation delayed |
Frequently asked questions (FAQ)
1. Which 2026 IndyCar oval race was the only one completely unaffected by rain?
The Phoenix Grand Prix at Phoenix Raceway was the only oval event in 2026 that did not suffer any weather-related delays or schedule changes.
2. Why did IndyCar schedule the Nashville oval race during a high rain-risk window?
The race was scheduled to capitalize on the massive TV lead-in audience following the FIFA World Cup final on Fox, drawing nearly 3 million viewers despite the eventual rain delay.
3. What happened during Race 1 at the Milwaukee Mile?
Race 1 was red-flagged on Lap 91 due to rain after a battle for the lead between Pato O’Ward and Felix Rosenqvist, forcing officials to adjust the Sunday track schedule.
