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Weather in Perth, ND · National Weather Service + NOAA

Perth has real winters

Perth has cold, snowy winters and pleasant summers, with very little rain. A typical July afternoon reaches 78°, a January night drops to -4°, and about 38 inches of snow falls in a normal winter. Normal November highs come to 33°, and lows to 15°.

Winter 18°/-1°Spring 49°/26°Summer 76°/52°Fall 51°/29°
Right now
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Sunrise 8:26 am · sunset 6:16 pm

Getting the latest forecast from the National Weather Service…

What stands out about Perth’s weather

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

Climate →
Real wintersJanuary nights average -4°, colder than 99% of U.S. towns.Cool summersJuly afternoons average 78°, cooler than 95% of U.S. towns.A dry climateJust 19 inches of rain and melted snow a year, less than 90% of U.S. towns.A short growing season126 frost-free days, from May 19 to Sep 24.
A normal year

Where today sits in Perth’s year

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

Full climate →
Winter
18° / -1°
16 days with an inch or more of snow
Spring
49° / 26°
Last frost around May 19
Summer
76° / 52°
5 days reach 90° in a normal year
Fall now
51° / 29°
First frost around Sep 24
Pastthe usual first frost (Sep 24). Last frost next spring: May 19
Best months to be outside
JunJulAugSep
Highs of 62–84° and lows of 40° or more
How much snow does Perth get?About 38 inches a winter.When is it wettest?June, with 3.8 inches.Is it warmer than it used to be?+1.6° vs. the 20th century.

Weather talk

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

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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 Perth itself (about a 3-mile square). Snow, frost dates and day counts: the NOAA station at Hansboro 4 Nne, ND (20 mi, snow) and Belcourt Keya Radio, ND (16 mi, frost, heat and degree days). Sunrise and sunset are calculated from the town’s position. Normals are 30-year averages, not a forecast.