Frost Report

All states Idaho

Frost dates for Mud Lake, 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

June 12

typical year

Safe to plant

June 30

frost is over in 9 of 10 years

First fall frost

September 7

typical year

Growing season

87 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 – May 15 – 29 –
Spinach – May 1 – 22 Jul 13 – 27
Lettuce – May 15 – Jun 5 Jul 13 – 27
Radishes – May 15 – Jun 26 Jul 27 – Aug 10
Onions – May 15 – 29 –
Potatoes Season usually too short. Try a quick variety or row covers.
Carrots – May 22 – Jun 12 Jun 15 – 29
Beets – May 15 – 29 Jun 29 – Jul 13
Kale Apr 3 – 17 May 15 – 29 Jun 29 – Jul 13
Broccoli Apr 3 – 17 May 29 – Jun 12 Jun 29 – Jul 13
Cabbage Mar 20 – Apr 3 May 15 – 29 Jun 29 – Jul 13
Garlic – – Jul 27 – Aug 17
Warm-season crops
Tomatoes Season usually too short. Try a quick variety or row covers.
Peppers Season usually too short. Try a quick variety or row covers.
Cucumbers – Jun 30 – Jul 21 –
Zucchini – Jun 30 – Jul 28 –
Pumpkins Season usually too short. Try a quick variety or row covers.
Green beans Season usually too short. Try a quick variety or row covers.
Sweet corn Season usually too short. Try a quick variety or row covers.
Basil May 26 – Jun 9 Jul 7 – 14 –

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 June 30June 12May 21
Fall frost before August 25September 7September 21

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 May 18 (June 11 in a late year), and the first one in fall around September 19.

Towns that use these dates

This is the nearest NOAA station with frost records for 1 town.

Mud Lake

Where these dates come from

NOAA weather station MONTEVIEW, ID US (USC00106080), 1991–2020 climate normals. It's the nearest station for 1 zip code, all within 4 miles:

83435

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