Dennis CDP, Massachusetts

Official LSAD Designation: Dennis CDP • Census GEOID: 2516740 • Barnstable County

Climate Normals & Weather Observations

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

Reference Weather Station: HYANNIS BARNSTABLE MUNI AP, MA US (ID: USW00094720) • Located 6.0 miles from community center • Elevation: 16.8 m

Month	Average High (°F)	Average Low (°F)	Mean Temp (°F)	Precipitation (in)
January	39.9°	24.1°	32.0°	3.90"
February	41.0°	24.8°	32.9°	3.17"
March	45.9°	30.3°	38.1°	4.25"
April	55.2°	38.5°	46.9°	3.90"
May	65.0°	48.0°	56.5°	3.42"
June	73.9°	57.5°	65.7°	3.14"
July	80.8°	64.8°	72.8°	2.68"
August	79.7°	63.4°	71.6°	3.25"
September	73.1°	55.8°	64.4°	3.85"
October	63.4°	45.7°	54.5°	4.33"
November	53.5°	37.3°	45.4°	4.13"
December	45.2°	29.3°	37.2°	4.68"

2010–2025, completed calendar years only.

NOAA station HYANNIS BARNSTABLE MUNI AP, MA US (ID: USW00094720) • 6.0 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	52.0	59.6	44.4
2011	51.6	59.6	43.6
2012	52.4	60.4	44.5
2013	51.0	59.0	43.0
2014	50.5	58.5	42.4
2015	50.6	58.9	42.4
2016	52.2	60.0	44.3
2017	51.7	59.3	44.1
2018	51.7	59.3	44.2
2019	51.3	59.2	43.4
2020	Unavailable	Unavailable	Unavailable
2021	53.2	60.8	45.6
2022	Unavailable	Unavailable	Unavailable
2023	52.0	59.4	44.5
2024	51.2	58.6	43.8
2025	50.2	57.9	42.6

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