Last Frost Date Yakima: Frost Dates, Late Frost Risk & Growing Season

When is the last spring frost and the first autumn frost in Yakima? Frost dates from 30 years of data, the risk of late frost, frost-free days and planting dates.

The frost season in Yakima

Last frost (average): May 1
In 1 year out of 10 it still freezes on May 12.
First frost: October 10
Frost-free season: 162 days
Frost after 15 May: in 7 % of years

Frost days per month in Yakima

January: 26.7 · -5 °C
February: 23.8 · -3 °C
March: 19.7 · -1 °C
April: 8.4 · 2 °C
May: 1.2 · 6 °C
June: 0 · 10 °C
July: 0 · 13 °C
August: 0 · 12 °C
September: 0.4 · 7 °C
October: 8.3 · 2 °C
November: 23.6 · -3 °C
December: 28.8 · -5 °C

Matched to the average lows of a weather station 4 km away – accurate to about ±1–2 weeks.
Daily minimum temperatures 2 m above ground over 30 years (1991–2020), NASA POWER; station data: Deutscher Wetterdienst (CC BY 4.0). Ground frost can form while the air at 2 m is still +2 to +3 °C.