Spirit Lake, ID 83869 Frost Dates
When can you plant in Spirit Lake, ID?
The last spring frost here typically falls around 05/22, about 267 days from today. The first fall frost typically arrives around 09/22, about 122 frost-free days later.
Zone 6b (-5 to 0°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Spirit Lake, not a forecast for this year.
What to do before the first frost
About 4 weeks of growing season left in Spirit Lake before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Spirit Lake's last frost
05/22 is the middle of 30 years of NOAA records, not a promise. Plant by 05/05 and you're betting against frost in roughly 9 years out of 10. 06/06 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Spirit Lake compares
At roughly 122 frost-free days, Spirit Lake places 38,936 of 40,283 ZIP codes in this dataset. Within ID, it ranks 198 of 320.
Learn more
local microclimates covers what one yard in Spirit Lake can differ from the 83869 normal. zone vs. frost date covers why Zone 6b and Spirit Lake's frost date answer different questions.