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
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| 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
Nearby towns & communities
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.