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Thomaston CDP, Maine

Official LSAD Designation: Thomaston CDP • Census GEOID: 2376330 • Knox County

Climate Normals & Weather Observations

30-year climate normals (1991–2020) and weather observations for Thomaston CDP.

Reference Weather Station: TENANTS HARBOR, ME US (ID: USC00176881) • Located 6.5 miles from community center • Elevation: 6.4 m
Month Average High (°F) Average Low (°F) Mean Temp (°F) Precipitation (in)
January 35.2° 17.4° 26.3° 4.01"
February 36.6° 19.2° 27.9° 3.49"
March 42.5° 25.4° 33.9° 4.50"
April 51.4° 33.9° 42.7° 4.25"
May 60.6° 42.7° 51.7° 3.53"
June 68.7° 50.2° 59.4° 3.83"
July 74.2° 56.1° 65.2° 3.08"
August 74.0° 56.6° 65.3° 2.85"
September 68.2° 51.5° 59.8° 4.01"
October 58.5° 42.6° 50.6° 4.71"
November 49.1° 33.7° 41.4° 4.51"
December 40.6° 24.4° 32.5° 4.83"

Annual Temperature History

2010–2025, completed calendar years only.

NOAA station TENANTS HARBOR, ME US (ID: USC00176881) • 6.5 miles from community center .

This is the same reference station used for monthly normals.

Annual mean Annual mean of daily highs Annual mean of daily lows
Annual temperature history at TENANTS HARBOR, ME US Year is the horizontal axis. Annual mean temperature in degrees Fahrenheit is the vertical axis. Dots show recorded years; lines connect consecutive available years only. Missing years are gaps, with no interpolation. Optional dashed lines show annual mean of daily highs and lows. Exact values appear in the data table below. 35.0 40.8 46.5 52.3 58.0 2010 2014 2018 2021 2025 Year Annual mean temperature (°F) 2010: Annual mean 47.7°F 2011: Annual mean 46.8°F 2013: Annual mean 45.4°F 2014: Annual mean 45.7°F 2017: Annual mean 46.6°F 2010: Annual mean of daily highs 54.1°F 2011: Annual mean of daily highs 53.2°F 2013: Annual mean of daily highs 51.7°F 2014: Annual mean of daily highs 52.6°F 2017: Annual mean of daily highs 55.3°F 2010: Annual mean of daily lows 41.2°F 2011: Annual mean of daily lows 40.4°F 2013: Annual mean of daily lows 39.0°F 2014: Annual mean of daily lows 38.8°F 2017: Annual mean of daily lows 38.0°F

Source: NOAA NCEI Global Summary of the Year.

Annual temperature data table (°F)
Annual station temperatures, 2010–2025. Unavailable means no reported value.
Year Annual mean (°F) Annual mean of daily highs (°F) Annual mean of daily lows (°F)
2010 47.7 54.1 41.2
2011 46.8 53.2 40.4
2012 Unavailable Unavailable Unavailable
2013 45.4 51.7 39.0
2014 45.7 52.6 38.8
2015 Unavailable Unavailable Unavailable
2016 Unavailable Unavailable Unavailable
2017 46.6 55.3 38.0
2018 Unavailable Unavailable Unavailable
2019 Unavailable Unavailable Unavailable
2020 Unavailable Unavailable Unavailable
2021 Unavailable Unavailable Unavailable
2022 Unavailable Unavailable Unavailable
2023 Unavailable Unavailable Unavailable
2024 Unavailable Unavailable Unavailable
2025 Unavailable Unavailable Unavailable
Source: NOAA NCEI 1991–2020 U.S. Climate Normals, National Weather Service.