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Hart, Moses and Mary, Stone House and Ranch ComplexHart, Moses and Mary, Stone House and Ranch Complex · Photo: Ian Poellet · CC BY-SA 4.0
Weather in Harper, OR · National Weather Service + NOAA

Harper has hot summers

Harper has chilly winters and hot summers, with very little rain. A typical July afternoon reaches 94°, a January night drops to 20°, and about 6 inches of snow falls in a normal winter. Normal November highs come to 50°, and lows to 25°.

Winter 42°/21°Spring 66°/35°Summer 90°/53°Fall 66°/34°
Right now
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Loading conditions…
Sunrise 9:32 am · sunset 7:35 pm

Getting the latest forecast from the National Weather Service…

What stands out about Harper’s weather

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

Climate →
Hot summersJuly afternoons average 94°, hotter than 94% of U.S. towns.Among Oregon’s coldest wintersJanuary nights average 20°, colder than 403 of 425 Oregon towns.A dry climateJust 8 inches of rain and melted snow a year, less than 99% of U.S. towns.
A normal year

Where today sits in Harper’s year

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

Full climate →
Winter
42° / 21°
2 days with an inch or more of snow
Spring
66° / 35°
Last frost around May 7
Summer
90° / 53°
49 days reach 90° in a normal year
Fall now
66° / 34°
First frost around Oct 3
Pastthe usual first frost (Oct 3). Last frost next spring: May 7
Best months to be outside
MayJunSep
Highs of 62–84° and lows of 40° or more
How much snow does Harper get?About 6 inches a winter.When is it wettest?December, with 1.1 inches.Is it warmer than it used to be?+1.3° vs. the 20th century.

Weather talk

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

Town Square →
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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 Harper itself (about a 3-mile square). Snow, frost dates and day counts: the NOAA station at Owyhee Dam, OR (24 mi, snow) and Westfall, OR (10 mi, frost, heat and degree days). Sunrise and sunset are calculated from the town’s position. Normals are 30-year averages, not a forecast.