Boise & Garden City

Update: Below-freezing temperatures move in over Boise

Boise frost advisory means time to harvest those last tomatoes

Temperatures are expected to dip into the mid-30s in Boise early Wednesday morning (Oct. 12, 2016), so be sure to cover sensitive plants, bring them indoors and/or harvest the last of the fruit on the vine.
Up Next
Temperatures are expected to dip into the mid-30s in Boise early Wednesday morning (Oct. 12, 2016), so be sure to cover sensitive plants, bring them indoors and/or harvest the last of the fruit on the vine.

There may be frost on your pumpkins Wednesday morning, Boise gardeners — but overnight lows the rest of the week will be warmer. And rain is on the way.

The National Weather Service issued a frost advisory for 2 a.m. to 8 a.m. Wednesday. Temperatures dropped to between 31 and 37 across Boise (areas in Downtown Boise and near the river got colder than neighborhoods up on the Boise Bench).

“There will be some spots that get a freeze,” meteorologist Dave Groenert said.

In lower parts of the region, including Canyon, Payette and Gem counties, temperatures are expected to dip below freezing for a short time, 30 to 32.

Some gardeners may be covering sensitive plants or moving them inside.

Debbie Courson Smith, a University of Idaho advanced master gardener, said she’s going to pick the remaining tomatoes, peppers and butternut squash on her vines Tuesday to prevent the fruit from being damaged by cold overnight.

“I put the tomatoes with vines attached in big bowls and leave them in the pantry to ripen,” she said.

The forecast shows that low temperatures will rebound into the upper 40s to about 50 the rest of the week. A series of storm systems are expected to come through Thursday, bringing rain through the weekend.

The average first freeze (32 or below) for Boise is Oct. 10, and the first hard freeze (28 or below) is Oct. 23, according to Weather Service records.

Katy Moeller: 208-377-6413, @KatyMoeller

  Comments