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Frost dates for Bellevue, Washington

In a typical year, Bellevue’s last spring frost lands around Mar 8 and the first fall frost around Nov 23, a growing season of about 260 days. These are odds drawn from 30-year NOAA climate normals, not a promise. USDA zone 9a.

Last spring frost and first fall frost odds for Bellevue, Washington
OddsLast spring frostFirst fall frost
10 percentFeb 13Nov 4
50 percentMar 8Nov 23
90 percentMar 29Dec 16

A 10 percent year is an early year, a 90 percent year a late one. Frost-sensitive planting usually waits for the 90 percent side of the last-frost band.

Soil in Bellevue is typically around 67°F at 4 inches this time of year, estimated from the last two weeks of normal air temperatures.

Plantable now in Bellevue

Timing comes from the same temperature engine the app uses, run against Bellevue’s normals for today.

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