Philomath, OR Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Philomath, a city in Benton County, Oregon.
Today
59°F
Areas Of Fog then Light Rain
Areas of fog before 10am, then rain. Mostly cloudy. High near 59, with temperatures falling to around 54 in the afternoon. South wind 0 to 3 mph. Chance of precipitation is 80%.
7-day forecast for Philomath
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 59°F | Areas Of Fog then Light Rain | 0 to 3 mph S | 76% |
| Tonight | 44°F | Chance Light Rain then Mostly Cloudy | 2 to 8 mph SSW | 54% |
| Thursday | 60°F | Patchy Fog then Mostly Sunny | 2 mph SSW | 9% |
| Thursday Night | 40°F | Patchy Fog | 2 mph W | 7% |
| Friday | 61°F | Slight Chance Light Rain | 3 mph S | 16% |
| Friday Night | 43°F | Mostly Cloudy | 1 mph S | 13% |
| Saturday | 65°F | Partly Sunny then Slight Chance Light Rain | 0 to 3 mph SSE | 22% |
| Saturday Night | 47°F | Light Rain Likely | 3 to 21 mph SSW | 73% |
| Sunday | 57°F | Chance Light Rain | 0 to 15 mph WSW | 41% |
| Sunday Night | 42°F | Slight Chance Light Rain then Mostly Cloudy | 1 mph NNE | 15% |
| Monday | 58°F | Chance Light Rain | 2 mph SE | 28% |
| Monday Night | 43°F | Chance Light Rain | 2 to 20 mph S | 32% |
| Tuesday | 59°F | Chance Light Rain | 5 to 16 mph S | 36% |
| Tuesday Night | 45°F | Chance Light Rain | 5 to 20 mph S | 38% |
Forecast source: National Weather Service (api.weather.gov) for Philomath (44.542, -123.360). Updated through the day.
Growing snapshot for Philomath
Last spring frost
Apr 17
First fall frost
Oct 28
Growing season
194 days
Hardiness zone
8b
More local growing data for Philomath: nearby ZIP 97331 weather · frost dates · planting calendar · Oregon frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Corvallis State Univ, Or (6.6 mi from Philomath). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.