A record-high temperature of 89 degrees gave Jackson County residents their first taste of summer on Sunday.

A record-high temperature of 89 degrees gave Jackson County residents their first taste of summer on Sunday.

The high temperature hit at 4:18 p.m. and broke the previous record of 84 on the same date in 1987, according to the National Weather Service office in Medford. "It's a record, but it's low-hanging fruit," said meteorologist Sven Nelaimishchkies.

It's not unusual to see temperatures reach 90 degrees on occasion around this time of year, he said. Sunday's high followed an 86-degree reading on Saturday, which didn't break any records. The previous all-time high was 92 on that day in 2009.

Nelaimishchkies said the valley typically gets its high temperature at 4 p.m. or 5 p.m. Unlike areas closer to the coast, the valley doesn't start sucking in cooler ocean air that would bring down the high temperatures earlier in the day. By 5 p.m., the sun angle results in less heating of the atmosphere, Nelaimishchkies said.

By the end of the day Sunday, clouds started rolling into the valley, but warm weather should continue through Wednesday.

Clouds and warm tempeartures could increase the chance of thunderstorms over the next day or two, Nelaimishchkies said.

Today the high is expected to reach 84, but dip to 78 by Tuesday.

A front will start rolling into the valley Wednesday, bringing a much cooler 61 degrees for a high on Thursday, along with rain.

"We're going to get back into a cooler, wet pattern," Nelaimishchkies said.

By weekend, temperatures should start rising, but showers and cooler weather could return by Sunday into next Monday, he said.

Though drought is no longer a problem, attaining normal rainfall amounts could be difficult at this late date.

"It's possible," Nelaimishchkies said. "We tend to be more showery, and the amount of rainfall becomes more hit and miss. What we normally get is less and less each day as we head closer to summer."

Reach reporter Damian Mann at 541-776-4476, or email dmann@mailtribune.com.