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
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| 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
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.