Montgomery-area residents could see the season's first frost Sunday morning, Oct. 18, after a week that starts in the mid-80s and ends with overnight lows in the upper 30s.

FOX19 meteorologist Brad Maushart forecast the swing in a Monday report, saying the Tri-State is in for "a little bit of everything this week, from summerlike warmth to thunderstorms, strong winds and even the first frost of the season."

Tuesday, Oct. 13, should reach the mid-80s under mostly sunny skies. That warmth is short-lived.

Storms Wednesday and Thursday

FOX19 designated Wednesday, Oct. 14, and Thursday, Oct. 15, as First Alert Weather Days. Scattered storms are expected both afternoons, with some potentially strong Wednesday evening. Exact timing and severity remain uncertain.

Patchy fog could develop early Thursday, especially south of downtown Cincinnati. Showers may linger into Friday morning.

Friday wind, then the big cooldown

A strong cold front arrives Friday, Oct. 16, bringing northwest wind gusts of 35 to 40 mph or higher. Maushart said residents with Halloween inflatables, lightweight outdoor decorations or unsecured furniture should secure them before the front passes.

Temperatures could touch the low 70s early Friday before dropping sharply. By Saturday, Oct. 17, highs will struggle to reach 60 degrees. That is roughly a 25-degree drop from Tuesday's peak.

Overnight Saturday into Sunday, temperatures are forecast to fall into the upper 30s. Maushart said the frost risk is highest in colder outlying communities. As of Tuesday, the National Weather Service (NWS) had not issued a frost advisory or freeze watch for Hamilton County. The forecast comes from FOX19, not an official NWS bulletin.

The Farmers' Almanac lists Cincinnati's average first fall frost around Oct. 20, based on 1991–2020 climate normals. A Sunday frost would arrive a couple of days ahead of that average.

What to do before Sunday

Maushart recommended that anyone with sensitive plants or lingering garden vegetables prepare to protect them. The Farmers' Almanac advises harvesting tender crops like tomatoes, peppers, basil and squash before the frost. Potted plants should come indoors when nighttime temperatures drop below 50°F. Old bedsheets, blankets or row covers can protect plants still in the ground. Avoid plastic covers, which can trap heat and damage foliage.

Sunday afternoon is forecast to be dry and cool, with highs near 63 degrees. Temperatures should recover gradually early the following week.

Weekend events to watch

Friday's gusty conditions could affect outdoor vendors and festival setups, including Panda Fest at Smale Riverfront Park, scheduled Oct. 16–18. FC Cincinnati hosts the Columbus Crew at TQL Stadium at 5 p.m. Sunday, Oct. 18, the same morning frost is expected.