Monmouth, OR Weather & Growing Conditions
This Afternoon
78°F
Mostly Sunny
Mostly sunny, with a high near 78. North wind around 2 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 78°F | Mostly Sunny | 2 mph N | 0% |
| Tonight | 51°F | Mostly Clear then Patchy Fog | 1 mph NW | 0% |
| Sunday | 81°F | Patchy Fog then Sunny | 0 to 3 mph N | 0% |
| Sunday Night | 52°F | Mostly Clear then Patchy Fog | 2 mph W | 0% |
| Monday | 78°F | Areas Of Fog then Mostly Sunny | 0 to 3 mph N | 0% |
| Monday Night | 51°F | Partly Cloudy | 0 to 3 mph NNW | 0% |
| Tuesday | 74°F | Patchy Fog then Mostly Sunny | 0 to 5 mph N | 0% |
| Tuesday Night | 48°F | Partly Cloudy | 0 to 5 mph NNW | 0% |
| Wednesday | 71°F | Mostly Sunny | 0 to 3 mph NNW | 0% |
| Wednesday Night | 49°F | Partly Cloudy | 3 mph NNW | 3% |
| Thursday | 69°F | Mostly Sunny | 2 to 7 mph N | 8% |
| Thursday Night | 49°F | Slight Chance Light Rain | 1 to 6 mph NNW | 22% |
| Friday | 66°F | Slight Chance Light Rain | 1 to 8 mph N | 22% |
| Friday Night | 48°F | Partly Cloudy | 3 to 8 mph NNW | 6% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Monmouth, OR
Last spring frost
Apr 18
First fall frost
Nov 7
Growing season
202 days
Hardiness zone
8b
Explore more for Monmouth, OR: full frost dates · planting calendar · Oregon frost dates
Climate data from the nearest NOAA station, Falls City 2 Ssw, Or (7.4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.