Othello, WA 99344 Frost Dates
When can you plant in Othello, WA?
The last spring frost here typically falls around 04/30, about 245 days from today. The first fall frost typically arrives around 10/12, about 165 frost-free days later.
The USDA Plant Hardiness Zone Map puts Othello in Zone 7a (0 to 5°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
About 6 weeks of growing season left in Othello before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Othello's last frost
04/30 is the middle of 30 years of NOAA records, not a promise. Plant by 04/12 and you're betting against frost in roughly 9 years out of 10. 05/15 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Othello compares
About 165 days separate Othello's last and first frost, putting it 30,529 of 40,283 ZIP codes nationally. Within WA, it ranks 554 of 700.
Learn more
zone vs. frost date covers why Zone 7a and Othello's frost date answer different questions. the frost range covers how to read the range around Othello's dates instead of trusting one.