Here is the Halloween weather forecast for the North Bay

Will North Bay trick-or-treaters have to cover their costumes with jackets this Halloween?

While rain is forecast for Thursday, The National Weather Service is unsure of the timing. Although, Meteorologists are predicting a higher chance of isolated showers in the morning.

The rain, which would be the second time since Sunday in the North Bay, was an expected result of a cold front that arrived Wednesday evening and moved through the region Thursday, said Matt Mehle, a meteorologist with the weather service's Monterey office.

“The big question is: Will there be precipitation in our area just before sunset and beyond?” Mehle said. “Our current forecast calls for some scattered showers, primarily in the heart of the Bay Area (and) north.”

The further north, the higher the chances are. Cloverdale will have the highest chance – about 30%, while San Francisco will have the lowest – about 20%. The rest of the North Bay falls into this area.

Mehle said those are pretty slim chances, especially given the scattered nature of the potential storms.

“If it's going to rain on Halloween, it's much more likely to rain in the first half of the day in the morning than during trick-or-treating,” he said.

Some Halloween events, such as Petaluma Valley Hospital's Trunk or Treat or trick-or-treating at Petaluma Village Premium Outlets, begin as early as 3 p.m. Local trick-or-treaters typically knock on doors from 5:30 p.m. to 9 p.m

If showers do occur, they are likely to be light to moderate in the morning and become lighter in the evening. Trick-or-treaters should expect slightly wet ground, with forecasts calling for between 1/10 and 1/2 inch of rain.

Meteorologists predict between 1/10th and 1/5th of an inch of rain will fall in valley areas such as Santa Rosa and Napa. At higher elevations and in areas closer to the coastal mountains such as Guerneville, 1/4 to 1/2 inch could be visible, Mehle said.

Overall, the chances are slim, but it wouldn't hurt for North Bay residents to bring an umbrella in case a storm hits.

Reach Staff Writer Madison Smalstig at [email protected]. On X (Twitter) @madi.smals.