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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.

This Afternoon
65°F
Mostly Sunny
Mostly sunny, with a high near 65. West wind around 6 mph.

7-day forecast for Knappa

WhenTempForecastWindPrecip
This Afternoon 65°F Mostly Sunny 6 mph W 0%
Tonight 51°F Patchy Fog 1 to 5 mph WNW 0%
Saturday 69°F Patchy Fog then Mostly Cloudy 1 to 6 mph NW 0%
Saturday Night 51°F Partly Cloudy 5 mph W 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 WNW 0%
Monday Night 52°F Partly Cloudy 3 to 9 mph NW 0%
Tuesday 65°F Partly Sunny 2 to 9 mph NW 1%
Tuesday Night 51°F Partly Cloudy then Patchy Fog 1 to 9 mph WNW 1%
Wednesday 66°F Patchy Fog then Partly Sunny 1 to 5 mph NNE 1%
Wednesday Night 52°F Partly Cloudy 0 to 5 mph NE 5%
Thursday 68°F Partly Sunny then Slight Chance Light Rain 5 mph N 18%
Thursday Night 52°F Chance Light Rain 5 mph W 26%

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.