EUGENE, OREGON — A sharp overnight chill is settling across the Willamette Valley, prompting a Frost Advisory from the National Weather Service in Portland through 9 a.m. Tuesday. Forecasters say clear skies and calm winds will allow temperatures to drop into the mid-30s, with the coldest pockets near Junction City, Creswell, and Springfield possibly touching the freezing mark before sunrise.
Cold Air Threatens Gardens and Crops
Meteorologists warn that frost formation is likely in Lane and Linn counties, extending into the Lower Columbia and North Coast Range valleys. Temperatures as low as 33°F could damage unprotected plants, gardens, and crops, especially in low-lying areas.
Residents are urged to bring potted plants indoors and cover sensitive vegetation overnight to prevent frost damage. Gardeners and vineyard owners are also advised to monitor morning lows closely, as patchy frost could persist into early Wednesday.
Warmer Afternoons Ahead
Despite the frosty start, sunshine returns by late morning Tuesday, helping temperatures climb into the low 60s. Dry, calm conditions will continue through midweek, with highs reaching the mid-60s by Thursday and Friday. The clear skies will keep overnight temperatures crisp, but the days will remain pleasant and mild.
Rain Expected This Weekend
By the weekend, weather models show a shift toward wetter conditions, with rain likely to return by late Saturday or Sunday across the southern Willamette Valley. The next system could bring another taste of classic Pacific Northwest fall weather as clouds and cooler air move in.
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