BOSTON (AP) – David Rosenberger rolled his eyes, shook his head in resignation, and muttered the word “frustrated,” when reminded of the weather forecast for Monday’s Boston Marathon.

Temperatures for the 108th Boston Marathon are expected to reach the mid-80s, according to the National Weather Service. The average maximum for April 19 is 57.

The good news, if there is any, is that there will be some cloud cover and the expected 20 to 30 mph sustained winds will be at the backs of the runners.

Rosenberger has been through this before, and it’s not fun.

“Every marathon I have run the temperature has been horrible,” the Eau Claire, Wis., resident said on Sunday, the day before his first Boston Marathon, seventh overall. “I ran a marathon in Milwaukee in October a few years ago, when it was in the 80s.”

The high temperatures will probably prevent the elite runners from setting any records, and the rank-and-file can probably forget about establishing personal bests, said Dr. Jim Barahal, who has been the president of the Honolulu Marathon since 1987. It gets so hot and humid in Hawaii in early December that the race starts at 5 a.m.

“The heat is never an advantage in terms of performance,” said Barahal, even for those elite runners used to training in extremely hot weather. “It will slow times.”

Everyone’s metabolism is different, and some people, no matter where they are from, deal with the heat more efficiently than others.

Even with temperatures in the 80s, Monday’s race will not approach the brutal conditions Jack Fultz won under in 1976 when temperatures along the route reached triple digits in some areas.

The key to dealing with the heat is to swallow your pride, Barahal said.

“The heat will slow you down no matter how tough you are mentally,” he said.

Know your limits, Barahal advises.

“The problems usually come with people who are pushing it,” he said, recalling the unusually hot 1995 Honolulu Marathon when more people than average ended up with medical problems. “People who train for this race are a stubborn lot, but they have to take responsibility for their own race. You’re not going to set a personal record (Monday), and they have to accept that.”

Barahal has some tips for beating the heat.

“Drink early and often. If you’re feeling lousy you need to slow down or drop out. If runners are sensible, they can get through this.”

Rosenberger was already considering a change in tactics.

“I have put so much time training that I hate to change my strategy, but you have to go by how you feel,” he said. “I wanted to run in the 2:40s, but I may just be happy to break three hours.”

Not all runners are letting the forecast affect their plans. Sharon Jenkins of Colorado Springs, Colo., is running Boston for the first time and is determined to finish in the 3:40 range. She may wear lighter clothing, but other than that, she is not changing her race strategy.

“The faster I run it, the faster I get it done. That’s my strategy,” said Jenkins, who was in Boston with her husband, Chris, and son, Nicholas, 5. “If I am not going to the emergency room, I am finishing, no matter what.”

Organizers are “ramped up and ready” for the heat, Boston Athletic Association spokesman Jack Fleming said. “With 107 years behind us we’ve had everything. We’ve had snow, sleet, ice, high cloud cover, low cloud cover, driving rain.”

The water stations at every mile will have additional water supplies, and extra medical personnel will be stationed along the route and at the finish line, Fleming said.

The field of 20,400 official entrants is the second largest in the 108-year history of the event, second only to the 100th anniversary field of more than 38,000 in 1996.

The top three men’s finishers from a year ago are back, including Robert Kipkoech Cheruiyot, who won in 2:10.11. He beat out fellow Kenyans Benjamin Kosgei Kimutai and Martin Lel. A Kenyan has won the men’s race in the 12 of the past 13 years.

Some of the other top men include Mohamed Ouaadi of France, Hailu Negussie of Ethiopia and Daniele Caimmi of Italy.

Two-time winner Catherine Ndereba leads the women’s field in the absence of defending champion Svetlana Zakharova of Russia, who won last year in 2:25.20.

Ndereba, who won in Boston in 2000 and 2001 but did not run last year, is the reigning world champion and the second-fastest woman in the history of the distance. Her top competitors are Elfenesh Alemu of Ethiopia, who won in Tokyo last year, two-time Olympian Jelena Prokopcuka of Latvia and Lyubov Denisova, a Russian who placed second in Boston last year.

This year’s race is a watershed for the women, who for the first time in Boston Marathon history, will leave the Hopkinton starting line at 11:31 a.m., 29 minutes before the men’s field and the horde of recreational runners.