Penobscot County Climate
Penobscot County, Maine
Avg Annual Temp
43.3°F
Annual Precip
43.8"
Annual Snowfall
77.4"
Extreme Heat Days
4.475
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Penobscot County Weather
Penobscot's brisk northern character
With an annual average of 43.3°F, Penobscot County is over 10 degrees cooler than the median U.S. county. Its climate features the sharp seasonal shifts typical of the humid continental North.
Mirroring the state average
The county's 43.3°F average closely tracks the overall Maine state average of 43.8°F. It serves as a representative middle ground between the state's frigid interior and warmer coast.
Milder than its northern neighbors
Penobscot enjoys a warmer profile than Piscataquis County, which averages only 41.8°F. It also receives about 12 inches less annual snowfall than the 89.9 inches seen in Piscataquis.
Cold winters and short heatwaves
January temperatures average 16.1°F, contributing to a substantial 77.4 inches of annual snowfall. The county typically experiences 4 days of extreme heat above 90°F during the July peak.
Equipping for the Penobscot seasons
Homeowners prioritize winterization and insulation to combat the 19.6°F average winter temperature. Reliable snow tires are essential for navigating the nearly 80 inches of annual accumulation.
Frequently Asked Questions
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Data source: NOAA National Centers for Environmental Information (NCEI), U.S. Climate Normals 1991-2020.
Climate normals are 30-year averages of weather variables computed from 1991 to 2020. Station data is aggregated to county level using spatial averaging. Data is informational only — not a substitute for official National Weather Service forecasts or emergency weather warnings.