Dover, ID 83813 Frost Dates
When can you plant in Dover, 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.
Dover sits in USDA Zone 6b (-5 to 0°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
What to do before the first frost
About 4 weeks of growing season left in Dover before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Dover'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 Dover compares
About 122 days separate Dover's last and first frost, putting it 38,951 of 40,283 ZIP codes nationally. Within ID, it ranks 199 of 320.
Learn more
local microclimates covers what one yard in Dover can differ from the 83813 normal. zone vs. frost date covers why Zone 6b and Dover's frost date answer different questions.