Metro

Mount Washington breaks temperature record for third day in a row

Mount Washington on Tuesday marked the warmest Sept. 26 ever recorded on the New Hampshire summit.
Robert F. Bukaty/Associated Press/File 2015
Mount Washington on Tuesday marked the warmest Sept. 26 ever recorded on the New Hampshire summit.

Temperatures on Mount Washington reached a record high of 67 degrees Tuesday, marking the warmest Sept. 26 ever recorded on the New Hampshire summit, and the hottest day of this year.

Mount Washington also broke daily temperature records Sunday and Monday, hitting 65 degrees Sunday and 63 degrees Monday, according to the Mount Washington Observatory.

Sunday and Monday’s records were close calls, beating previous highs by 3 degrees and 1 degree respectively, but Tuesday’s record high blew the old one out of the water.

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The 67-degree reading was 8 degrees hotter than the previous record high of 59 degrees in 1961, Mount Washington Observatory meteorologist Adam Gill said.

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Tuesday’s high of 67 was also the hottest day on record on Mount Washington so far this year, Gill said. And less than a month ago, it was snowing on the summit.

“It’s pretty unusual to have the warmest day of the year in September . . . especially since we’ve already seen our first snow here,” Gill said.

There’s been a draft over the east for much of the summer, allowing for cooler temperatures, Gill said. On Tuesday, wind conditions changed.

“Today there was absolutely no wind up here, which is pretty unusual for the summit, so that probably allowed the temperature to get higher,” he said.

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Hurricanes Jose and Maria also contributed to the balmy weather, passing close to New England and pushing the jet stream north, allowing warm air from the south to roll in.

The wacky weather seems to have confused the foliage on Mount Washington, Gill said, stalling leaves that started to change and fall at the beginning of the month but now remain stagnant on the trees.

“It seems like the leaves have stopped changing,” he said.

Gill said Wednesday’s weather could also be unseasonably warm in the morning, again climbing into the 60s, but by the afternoon, a cold front will roll in and stay through the weekend.

Alyssa Meyers can be reached at alyssa.meyers@globe.com. Follow her on Twitter @ameyers_.