Seattle’s nearly three-week dry spell may end with rain Tuesday, but not enough to significantly bring down above-normal temperatures that have been warming the city, meteorologists say.

Tuesday is expected to be the warmest day of the week, with highs in the upper 80s to lower 90s, according to National Weather Service meteorologist Gary Schneider. There’s a chance for showers and thunderstorms, but nothing with constant, measurable rainfall.

“It’s not like the winter with steady rain,” Schneider said. “It will be hit or miss.”

Temperatures should cool down Wednesday with highs in the upper 70s and remain steady the rest of the week.

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Thunderstorms are possible again Wednesday morning in areas north and east of Seattle.

July’s highs in the Seattle area are usually around 76 degrees, Schneider said, but temperatures have been higher lately, thanks to a relatively high-pressure system over the area.

It last rained June 27, making July a rainless month so far. Only five months have gone without measurable rain since 1945: July 1958 and 1960; September 1975 and 1991; and August 2012, according to the weather service.

Last summer, Schneider said, Seattle went 48 days without any rain, the second-longest dry streak on record.

The dry weather won’t be changing anytime soon, Schneider said.

“We have at least a few more months of dry weather,” he said.

Sure, temperatures are above normal, but don’t expect much sympathy from the rest of the country. The Northeast is sweltering under a heat wave; New York City’s heat index Monday was above 100 degrees, according to the weather service. Phoenix’s highs for the rest of the week will dance around 100, and lows won’t dip below 85.

“No, we don’t have that here,” Schneider said. “We have the Pacific Ocean to keep us air-conditioned.”

Paige Cornwell: 206-464-2517 or