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United States › Maine › Penobscot County › Climate Station LINCOLN SANITARY DISTRICT/WTP, ME US Distance 8 mi Normals 1991–2020

30-year climate normals

Penobscot County Climate and Weather Averages

Hottest month — July

79.3°

average daily high. The coldest month is January, averaging a low of 3.4°F.

Penobscot County gets 44.27" of precipitation a year, and 30% of it falls in Oct, Nov, Dec.

Temperature through the year

Each bar spans the average daily low to the average daily high for that month.

20° 40° 60° JanFebMarAprMayJunJulAugSepOctNovDec
MonthAvg highAvg low Precip
January 25.6° 3.4° 3.46"
February 29.1° 4.8° 2.38"
March 38.2° 17.0° 3.52"
April 51.7° 30.4° 3.58"
May 65.5° 43.0° 3.72"
June 74.0° 52.5° 4.07"
July 79.3° 58.8° 3.37"
August 77.7° 56.5° 3.61"
September 69.5° 47.6° 3.43"
October 56.5° 36.7° 4.73"
November 43.5° 27.2° 4.17"
December 31.5° 14.8° 4.23"

Rainfall by month

Precipitation is spread fairly evenly through the year here, with 30% falling in the wettest three months (Oct, Nov, Dec).

January 3.46"
February 2.38"
March 3.52"
April 3.58"
May 3.72"
June 4.07"
July 3.37"
August 3.61"
September 3.43"
October 4.73"
November 4.17"
December 4.23"
Annual total 44.27"

What this climate costs you

Degree days measure how hard a building has to work to stay comfortable. They are the reason two identical houses have very different power bills, and they are the link between the weather here and what you pay every month.

Cooling degree days How much air conditioning the climate demands 337
Heating degree days How much heating the climate demands 8,272
Approximate annual cooling cost At 28.63¢/kWh, Maine average $96
Approximate annual electric heating cost Lower where heating is gas rather than electric $829

These are rough planning figures from degree days and the state electricity price, not a bill estimate. House size, insulation and fuel type move them a lot. See the full cost of owning a home in Penobscot County, where electricity is one line of eight.

Common questions

What is the weather like in Penobscot County?

Penobscot County averages a high of 79.3°F in July and a low of 3.4°F in January. Annual precipitation is 44.27 inches, with essentially no snow.

When is the rainy season in Penobscot County?

The wettest stretch is Oct, Nov, Dec, which accounts for 30% of the year's precipitation. Precipitation is relatively evenly distributed across the year.

How hot does it get in Penobscot County?

The average daily high in July, the hottest month, is 79.3°F. That drives 337 cooling degree days a year, which is what your air conditioning has to work against.

Does it snow in Penobscot County?

Effectively no. Measurable snowfall is rare in Penobscot County.

Sources

  • Temperature, precipitation and snowfall normals — NOAA National Centers for Environmental Information, 1991–2020 Monthly Climate Normals, station LINCOLN SANITARY DISTRICT/WTP, ME US (USC00174683), 8 miles from the county centroid.
  • Heating and cooling degree days — NOAA, same station and period.
  • Electricity price — US Energy Information Administration, Electric Power Monthly Table 5.6.A, Maine residential average.
  • Wet-season share is the wettest three consecutive months as a percentage of annual precipitation, calculated from the monthly normals.