Old Farmer’s Almanac: Portland’s winter colder, rest of state stays mild

Published 6:00 am Thursday, August 29, 2024

It is still summer — there’s about a month of the season left, in fact — but you can now plan for what’s coming down the road, thanks to the arrival of one of the most anticipated and longstanding annual winter weather predictions.

The 2025 Old Farmer’s Almanac, released on Tuesday, determined that the very northern tip of Oregon — including Portland — will see a colder-than-normal winter, but most of the state will see a mild winter.

The Pacific Northwest region will see its coldest spells in January and again in early March. Precipitation and snowfall will be above average in the north portion of the Pacific Northwest, which would include the very northern portion of Oregon, but below average in the south.

The snowiest periods for the region are forecasted for late December, early January and early February.

The U.S. is predicted to see a mild winter overall. Certain portions of the nation — such as in central and southern Appalachia, the western Ohio Valley and the Rockies — will see heavy snowfall.

The almanac’s winter-weather predictions for last year had a 64% accuracy rate, which is well below its usual 80% accuracy rate, said Sarah Parreault, managing editor of The Old Farmer’s Almanac.

“We are honest,” she said in an interview with The Oregonian/OregonLive. “It wasn’t our best year.”

Parreault said she’s feeling confident about this year’s winter predictions.

The almanac has put together long-range weather predictions since 1792, and staffers continue to use the same formula, using solar science and other methods, that was developed by its founder, Robert B. Thomas. Staff meteorologists and members of the editorial team have enhanced that formula in recent years with modern scientific data and calculations, Parreault said.

“It’s fun as we are working on it to know that this is something that’s been happening for over 200 years, and you know, we’ve got quite the reputation to live up to,” she said.

The almanac also provides a summer forecast. It predicts April and May 2025 will be warmer and drier than normal for the Pacific Northwest region, while the summer is predicted to be cooler and drier than usual, with its hottest days in mid-July. September and October are forecasted to be warmer and wetter.

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