Monmouth, OR Weather & Growing Conditions
Overnight
39°F
Areas Of Fog
Areas of fog. Partly cloudy, with a low around 39. Wind around 0 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 39°F | Areas Of Fog | 0 mph | 1% |
| Wednesday | 57°F | Areas Of Fog then Light Rain | 0 to 3 mph SSW | 83% |
| Wednesday Night | 45°F | Light Rain Likely then Patchy Fog | 1 to 7 mph SSW | 62% |
| Thursday | 59°F | Patchy Fog then Mostly Sunny | 0 to 3 mph S | 6% |
| Thursday Night | 42°F | Areas Of Fog | 0 mph | 9% |
| Friday | 60°F | Slight Chance Light Rain | 0 to 5 mph S | 18% |
| Friday Night | 45°F | Slight Chance Light Rain then Mostly Cloudy | 1 mph W | 17% |
| Saturday | 63°F | Partly Sunny then Slight Chance Light Rain | 0 to 3 mph SSE | 24% |
| Saturday Night | 48°F | Light Rain | 3 to 16 mph SSW | 75% |
| Sunday | 57°F | Chance Light Rain | 1 to 7 mph WSW | 40% |
| Sunday Night | 43°F | Mostly Cloudy then Slight Chance Light Rain | 1 mph N | 15% |
| Monday | 57°F | Chance Light Rain | 2 mph SSE | 32% |
| Monday Night | 45°F | Chance Light Rain | 2 to 10 mph S | 35% |
| Tuesday | 59°F | Chance Light Rain | 2 to 8 mph S | 38% |
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 Nov 4, 2026.