Waterloo, OR Weather & Growing Conditions
Overnight
37°F
Patchy Fog
Patchy fog between 4am and 5am, then patchy frost. Mostly clear, with a low around 37. South southeast wind around 2 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 37°F | Patchy Fog | 2 mph SSE | 1% |
| Wednesday | 59°F | Patchy Fog then Light Rain | 1 to 5 mph S | 77% |
| Wednesday Night | 44°F | Light Rain | 2 to 8 mph S | 92% |
| Thursday | 59°F | Mostly Sunny | 2 mph S | 13% |
| Thursday Night | 39°F | Patchy Fog then Partly Cloudy | 3 mph ESE | 4% |
| Friday | 61°F | Mostly Cloudy | 3 mph SSE | 11% |
| Friday Night | 42°F | Mostly Cloudy | 3 mph SE | 11% |
| Saturday | 64°F | Mostly Sunny then Slight Chance Light Rain | 2 mph S | 15% |
| Saturday Night | 45°F | Light Rain Likely | 2 to 12 mph S | 69% |
| Sunday | 56°F | Light Rain Likely | 1 to 7 mph SSW | 57% |
| Sunday Night | 41°F | Slight Chance Light Rain then Mostly Cloudy | 2 mph ENE | 15% |
| Monday | 57°F | Slight Chance Light Rain | 2 mph S | 21% |
| Monday Night | 43°F | Chance Light Rain | 2 to 10 mph S | 29% |
| Tuesday | 59°F | Chance Light Rain | 2 to 8 mph S | 34% |
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 Nov 4, 2026.