Georgetown, ID 83239 Frost Dates
83239, near Georgetown, ID: the frost window
The last spring frost here typically falls around 06/17, about 293 days from today. Fall's first freeze usually shows up around 09/03, roughly 77 days after the last spring frost.
Zone 5b (-15 to -10°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 Georgetown, not a forecast for this year.
Stretching the season past the first frost
Georgetown's growing season runs out in roughly 1 week — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 06/17 isn't a guarantee
06/17 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/31 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 07/04 and only about 1 year in 10 sees frost after that.
Georgetown against the rest of the dataset
Georgetown's growing season runs about 77 days, ranking 40,080 of 40,283 US ZIP codes measured here, longest to shortest. Within ID, it ranks 295 of 320.
Learn more
Two guides worth reading on 83239: zone vs. frost date, on why Zone 5b and Georgetown's frost date answer different questions, and the frost range, on how to read the range around Georgetown's dates instead of trusting one.