Mill City, OR Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Mill City, a city in Linn County, Oregon.

Overnight

39°F

Mostly Clear

Mostly clear, with a low around 39. South southeast wind around 3 mph.

7-day forecast for Mill City

When	Temp	Forecast	Wind	Precip
Overnight	39°F	Mostly Clear	3 mph SSE	0%
Wednesday	60°F	Partly Sunny then Light Rain Likely	2 to 6 mph S	62%
Wednesday Night	44°F	Light Rain	1 to 6 mph SW	94%
Thursday	58°F	Chance Light Rain then Mostly Sunny	1 mph S	39%
Thursday Night	40°F	Partly Cloudy	0 to 5 mph E	4%
Friday	61°F	Mostly Cloudy then Slight Chance Light Rain	0 to 3 mph SSE	15%
Friday Night	43°F	Slight Chance Light Rain then Mostly Cloudy	0 to 6 mph SE	15%
Saturday	67°F	Mostly Sunny then Slight Chance Light Rain	0 to 5 mph SSE	15%
Saturday Night	45°F	Light Rain Likely	0 to 6 mph S	70%
Sunday	55°F	Light Rain Likely	0 to 3 mph SW	70%
Sunday Night	42°F	Slight Chance Light Rain	0 to 5 mph ENE	15%
Monday	58°F	Slight Chance Light Rain	3 mph SE	21%
Monday Night	42°F	Chance Light Rain	1 to 6 mph SSE	29%
Tuesday	60°F	Chance Light Rain	2 to 6 mph SSE	35%

Forecast source: National Weather Service (api.weather.gov) for Mill City (44.752, -122.477). Updated through the day.

Growing snapshot for Mill City

Last spring frost

Mar 9

First fall frost

Dec 3

Growing season

270 days

Hardiness zone

More local growing data for Mill City: nearby ZIP 97360 weather · frost dates · planting calendar · Oregon frost dates

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Climate data from the nearest NOAA station, Detroit Dam, Or (11.3 mi from Mill City). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.