Frost Report

All states Idaho

Frost dates for Yellowpine Bar, ID

When the last spring frost and first fall frost usually come, and when to plant, from 30 years of NOAA weather records.

Last spring frost

May 2

typical year

Safe to plant

May 14

frost is over in 9 of 10 years

First fall frost

October 10

typical year

Growing season

159 days

frost-free, typical year

When to plant

Counted from this page's frost dates. Warm-season crops wait for the safe-to-plant date.

CropStart indoorsPlant outsideFall planting
Cool-season crops
Peas – Apr 4 – 18 –
Spinach – Mar 21 – Apr 11 Aug 15 – 29
Lettuce – Apr 4 – 25 Aug 15 – 29
Radishes – Apr 4 – May 16 Aug 29 – Sep 12
Onions – Apr 4 – 18 –
Potatoes – Apr 11 – 25 –
Carrots – Apr 11 – May 2 Jul 18 – Aug 1
Beets – Apr 4 – 18 Aug 1 – 15
Kale Feb 21 – Mar 7 Apr 4 – 18 Aug 1 – 15
Broccoli Feb 21 – Mar 7 Apr 18 – May 2 Aug 1 – 15
Cabbage Feb 7 – 21 Apr 4 – 18 Aug 1 – 15
Garlic – – Aug 29 – Sep 19
Warm-season crops
Tomatoes Mar 19 – Apr 2 May 14 – 28 –
Peppers Mar 12 – 26 May 21 – Jun 4 –
Cucumbers – May 14 – Jun 4 –
Zucchini – May 14 – Jun 11 –
Pumpkins – May 14 – Jun 4 –
Green beans – May 14 – Aug 1 –
Sweet corn – May 14 – Jun 11 –
Basil Apr 9 – 23 May 21 – 28 –

Onions: from sets. Green beans: until 10 weeks before the first fall frost. Garlic: harvest next summer.

The year at a glance

Start indoors Plant outside Fall planting

The chance of frost, by date

1 year in 10Half of years9 years in 10
Spring frost after May 14May 2April 18
Fall frost before September 26October 10October 25

Frost here means 32°F or colder. Read across: in 1 year in 10, spring frost carries on past the first date, which is why that date is the safe-to-plant date.

Hard freeze (28°F)

A hard freeze kills most garden plants, even hardy ones. The last one in spring usually comes around April 14 (April 30 in a late year), and the first one in fall around October 23.

Where these dates come from

NOAA weather station YELLOWPINE BAR, ID US (USC00109963), 1991–2020 climate normals. It's the nearest station for 2 zip codes, all within 17 miles:

83525, 83611

Planting dates follow common university extension advice; your local extension service can fine-tune them for your soil and microclimate.