Weather · Dumbarton
Dumbarton forecast & conditions
Current conditions, the 7-day outlook and hour-by-hour details for Dumbarton, straight from the National Weather Service. Watches and warnings show up first.
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Climate · a normal year
What a year in Dumbarton feels like
Dumbarton has chilly winters and warm summers. A typical July afternoon reaches 89°, a January night drops to 27°, and about 15 inches of snow falls in a normal winter.
50° / 29°Winter
69° / 45°Spring
87° / 66°Summer
70° / 48°Fall
How much snow does Dumbarton get?About 15 inches a winter.Rain & snow →When is the first frost?Around Oct 31, with the last in spring around Apr 10.Frost dates →Is it warmer than it used to be?+1.0° vs. the 20th century.Then & now →
See Dumbarton’s full climate →
NOAA U.S. Climate Normals, 1991–2020. A normal is a 30-year average, not a forecast.
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Data from the U.S. National Weather Service (weather.gov) — free public data, not modified by TownTapestry. Not a substitute for official warnings; always follow weather.gov and local authorities.