Mashantucket CDP, Connecticut

Official LSAD Designation: Mashantucket CDP • Census GEOID: 0945995 • Southeastern Connecticut Planning Region

Climate Normals & Weather Observations

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

Reference Weather Station: NORWICH PUBLIC UTILITY PLT, CT US (ID: USC00065910) • Located 6.4 miles from community center • Elevation: 6.1 m

Month	Average High (°F)	Average Low (°F)	Mean Temp (°F)	Precipitation (in)
January	37.7°	21.2°	29.5°	3.89"
February	40.5°	22.9°	31.7°	3.75"
March	47.8°	29.4°	38.6°	5.09"
April	59.3°	39.1°	49.2°	4.71"
May	69.9°	48.9°	59.4°	3.64"
June	78.4°	58.5°	68.4°	4.27"
July	84.1°	64.8°	74.4°	3.63"
August	82.6°	62.7°	72.6°	4.41"
September	75.5°	54.9°	65.2°	4.79"
October	63.9°	43.6°	53.8°	4.86"
November	53.0°	34.3°	43.6°	4.17"
December	43.2°	27.0°	35.1°	4.97"

2010–2025, completed calendar years only.

NOAA station NORWICH PUBLIC UTILITY PLT, CT US (ID: USC00065910) • 6.4 miles from community center .

This is the same reference station used for monthly normals.

Show annual mean of daily highs and lows

Annual mean Annual mean of daily highs Annual mean of daily lows

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	Unavailable	Unavailable	Unavailable
2011	Unavailable	Unavailable	Unavailable
2012	54.4	63.9	44.8
2013	52.0	61.5	42.4
2014	50.7	60.5	40.9
2015	51.5	61.7	41.4
2016	53.4	63.3	43.5
2017	52.8	61.8	43.8
2018	52.7	61.4	44.0
2019	51.7	60.8	42.5
2020	53.7	63.1	44.3
2021	53.5	62.4	44.5
2022	53.0	62.8	43.2
2023	54.2	63.6	44.8
2024	54.0	63.3	44.6
2025	52.1	61.6	42.6

Source: NOAA NCEI 1991–2020 U.S. Climate Normals, National Weather Service.