Knappa, OR Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Knappa, a community in Clatsop County, Oregon.
Overnight
57°F
Patchy Smoke
Patchy smoke. Clear, with a low around 57. East wind around 3 mph.
7-day forecast for Knappa
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 57°F | Patchy Smoke | 3 mph E | 0% |
| Tuesday | 85°F | Areas Of Smoke | 3 to 8 mph NNE | 0% |
| Tuesday Night | 59°F | Patchy Smoke | 1 to 7 mph SW | 0% |
| Wednesday | 87°F | Patchy Smoke | 2 to 8 mph NNW | 0% |
| Wednesday Night | 57°F | Mostly Clear | 2 to 8 mph W | 0% |
| Thursday | 79°F | Sunny | 1 to 8 mph W | 0% |
| Thursday Night | 56°F | Partly Cloudy | 3 to 8 mph W | 0% |
| Friday | 75°F | Sunny | 3 to 10 mph WNW | 0% |
| Friday Night | 55°F | Mostly Clear | 6 to 10 mph WNW | 0% |
| Saturday | 71°F | Mostly Sunny | 6 to 12 mph WNW | 1% |
| Saturday Night | 55°F | Partly Cloudy | 7 to 12 mph WNW | 1% |
| Sunday | 68°F | Partly Sunny | 6 to 12 mph WNW | 1% |
| Sunday Night | 55°F | Partly Cloudy | 6 to 12 mph WNW | 1% |
| Monday | 68°F | Mostly Sunny | 5 to 10 mph WNW | 1% |
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 Aug 4, 2026.