Coming into the 2025 U.S. Open, much of the conversation centered around the difficulty of Oakmont Country Club. On Thursday, despite some solid scoring early, we saw just how difficult Oakmont would be as the average score in the early wave was more than 5 over par despite the best conditions players will see all week.

Utah's Tony Finau, Zac Blair and Preston Summerhays combined to shoot 18 over par Thursday in first round of 125th U.S. Open

According to weatherunderground.com, the first round of the US Open on June 12 will be sunny with a mix of clouds and hot for Western Pennsylvania, with a high of 87 degrees and a low of 65. There is a 6 percent chance of rain and the wind will be WSW at 5-10 mph.

J.J. Spaun emerged as the surprise early first-round U.S. Open leader on Thursday at Oakmont Country Club where Rory McIlroy was two shots back, defending champion Bryson DeChambeau opened with a bogey and Scottie Scheffler had yet to start.

Who will win the 2025 U.S. Open? Here's who our experts are predicting to win the trophy at Oakmont Country Club.

U.S. Open Golf Championship will continue on Friday with the second round at Oakmont Country Club in Pennsylvania.

U.S. Open Championship at Oakmont Country Club is expected to be the toughest test of golf the world’s best face this year, and there are early reports that this could be the most challenging U.S. Open in the past 20 years.