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Weather in Seneca, OR · National Weather Service + NOAA

It hardly ever freezes in Seneca

Seneca has chilly winters and pleasant summers, with very little rain. A typical July afternoon reaches 83°, a January night drops to 16°. In November, a normal day reaches 44° and a normal night drops to 22°.

Winter 38°/17°Spring 54°/28°Summer 79°/41°Fall 58°/28°
Right now
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Sunrise 9:34 am · sunset 7:44 pm

Getting the latest forecast from the National Weather Service…

What stands out about Seneca’s weather

Read from 30 years of NOAA records. Each one opens the full story on the Climate page.

Climate →
It hardly ever freezesOnly 100% of years see a night at 32° or below.Among Oregon’s coldest wintersJanuary nights average 16°, colder than 423 of 425 Oregon towns.A dry climateJust 15 inches of rain and melted snow a year, less than 94% of U.S. towns.A long heating seasonMore heating degree days than 94% of U.S. towns.
A normal year

Where today sits in Seneca’s year

Typical highs and lows month by month, from 30 years of NOAA records.

Full climate →
Winter
38° / 17°
Snow is rare
Spring
54° / 28°
Frost is rare by spring
Summer
79° / 41°
13 days reach 90° in a normal year
Fall now
58° / 28°
Mild well into the fall
Best months to be outside
JulAug
Highs of 62–84° and lows of 40° or more
When is it wettest?December, with 2.0 inches.Is it warmer than it used to be?+1.3° vs. the 20th century.What is each month like?Highs, lows, rain and snow for all 12.

Weather talk

Road reports, first frosts and storm memories from neighbors in Seneca.

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Forecast, conditions and alerts: National Weather Service. Climate: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000. Temperatures and rainfall come from NOAA’s gridded normals for Seneca itself (about a 3-mile square). Snow, frost dates and day counts: the NOAA station at Seneca, OR (1 mi, frost, heat and degree days). Sunrise and sunset are calculated from the town’s position. Normals are 30-year averages, not a forecast.