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Knappa, OR Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Knappa, a community in Clatsop County, Oregon.

Overnight
51°F
Patchy Fog
Patchy fog. Mostly cloudy, with a low around 51. Wind around 0 mph.

7-day forecast for Knappa

WhenTempForecastWindPrecip
Overnight 51°F Patchy Fog 0 mph 0%
Saturday 69°F Patchy Fog then Partly Sunny 0 to 6 mph WNW 0%
Saturday Night 51°F Partly Cloudy 5 mph WSW 0%
Sunday 70°F Mostly Sunny 2 to 7 mph WNW 0%
Sunday Night 52°F Partly Cloudy 3 to 7 mph WNW 0%
Monday 68°F Partly Sunny 2 to 9 mph NW 0%
Monday Night 52°F Mostly Cloudy 2 to 9 mph NW 0%
Tuesday 66°F Partly Sunny 2 to 8 mph WNW 0%
Tuesday Night 51°F Mostly Cloudy then Patchy Fog 1 to 8 mph WNW 1%
Wednesday 65°F Partly Sunny 1 to 6 mph NNW 3%
Wednesday Night 51°F Mostly Cloudy 1 to 6 mph NW 3%
Thursday 64°F Mostly Cloudy 1 to 7 mph N 12%
Thursday Night 50°F Mostly Cloudy 2 to 7 mph NW 13%
Friday 63°F Mostly Sunny 2 to 8 mph NW 10%

Forecast source: National Weather Service (api.weather.gov) for Knappa (46.171, -123.580). Updated through the day.

Growing snapshot for Knappa

Last spring frost
Mar 30
First fall frost
Nov 18
Growing season
233 days
Hardiness zone
8b

More local growing data for Knappa: nearby ZIP 97103 weather · frost dates · planting calendar · Oregon frost dates

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Climate data from the nearest NOAA station, Ft Clatsop Natl Mem, Or (8.6 mi from Knappa). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.