Lostine, OR 97857 Frost Dates
Lostine, OR: when does the frost end?
Typically, the last spring freeze lands around 06/07, roughly 283 days out. Fall's first freeze usually shows up around 09/09, roughly 91 days after the last spring frost.
Lostine sits in USDA Zone 6a (-10 to -5°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.
Stretching the season past the first frost
With roughly 2 weeks until Lostine's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Lostine's last frost
06/07 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/14 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 07/07 and only about 1 year in 10 sees frost after that.
Lostine against the rest of the dataset
Lostine's growing season runs about 91 days, ranking 39,908 of 40,283 US ZIP codes measured here, longest to shortest. Within OR, it ranks 434 of 463.
Learn more
Before leaning on 97857's figures: zone vs. frost date explains why Zone 6a and Lostine's frost date answer different questions, while the frost range explains how to read the range around Lostine's dates instead of trusting one.