Waterloo, OR Weather & Growing Conditions
Tonight
49°F
Mostly Clear then Patchy Fog
Patchy fog after midnight. Mostly clear, with a low around 49. North northwest wind around 3 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 49°F | Mostly Clear then Patchy Fog | 3 mph NNW | 0% |
| Saturday | 78°F | Patchy Fog then Mostly Sunny | 1 to 5 mph NNW | 0% |
| Saturday Night | 50°F | Partly Cloudy then Patchy Fog | 0 to 5 mph NNW | 0% |
| Sunday | 80°F | Patchy Fog then Sunny | 0 to 6 mph NNW | 0% |
| Sunday Night | 51°F | Mostly Clear then Areas Of Fog | 0 to 6 mph NNW | 0% |
| Monday | 76°F | Areas Of Fog then Mostly Sunny | 0 to 7 mph NNW | 0% |
| Monday Night | 50°F | Partly Cloudy then Areas Of Fog | 0 to 7 mph N | 0% |
| Tuesday | 73°F | Areas Of Fog then Mostly Sunny | 0 to 7 mph NNW | 1% |
| Tuesday Night | 47°F | Partly Cloudy | 0 to 7 mph N | 1% |
| Wednesday | 73°F | Mostly Sunny | 0 to 6 mph NNW | 0% |
| Wednesday Night | 50°F | Partly Cloudy | 1 to 6 mph NE | 0% |
| Thursday | 76°F | Mostly Sunny | 0 to 5 mph WNW | 6% |
| Thursday Night | 50°F | Slight Chance Light Rain | 5 mph SSW | 23% |
| Friday | 69°F | Slight Chance Light Rain then Mostly Sunny | 2 to 7 mph W | 16% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Waterloo, OR
Last spring frost
Mar 14
First fall frost
Nov 18
Growing season
248 days
Hardiness zone
8b
Explore more for Waterloo, OR: full frost dates · planting calendar · Oregon frost dates
Climate data from the nearest NOAA station, Lebanon, Or (4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.