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Weather in Roslyn, WA · National Weather Service + NOAA

Roslyn stays cool in summer

Roslyn has chilly winters and cool summers, with plenty of rain. A typical July afternoon reaches 73°, a January night drops to 24°. Normal November highs come to 39°, and lows to 29°.

Winter 34°/24°Spring 50°/33°Summer 70°/47°Fall 52°/37°
Right now
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Sunrise 9:51 am · sunset 7:44 pm

Getting the latest forecast from the National Weather Service…

What stands out about Roslyn’s weather

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

Climate →
Cool summersJuly afternoons average 73°, cooler than 99% of U.S. towns.A wet climate55 inches of rain and melted snow a year, more than 95% of U.S. towns.
A normal year

Where today sits in Roslyn’s year

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

Full climate →
Winter
34° / 24°
Snow is rare
Spring
50° / 33°
Last frost around May 9
Summer
70° / 47°
7 days reach 90° in a normal year
Fall now
52° / 37°
First frost around Oct 6
Pastthe usual first frost (Oct 6). Last frost next spring: May 9
Best months to be outside
JunJulAugSep
Highs of 62–84° and lows of 40° or more
When is it wettest?December, with 9.4 inches.Is it warmer than it used to be?+1.2° 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 Roslyn.

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 Roslyn itself (about a 3-mile square). Snow, frost dates and day counts: the NOAA station at Easton, WA (3 mi, frost, heat and degree days). Sunrise and sunset are calculated from the town’s position. Normals are 30-year averages, not a forecast.