TODAY JUN25
TEMPERATURE67
HUMIDITY97
PRESSURE29.81
WIND COND.190 6.9
  • 6754Mon
  • 7061Tue
  • 7465Wed
  • 7465Thu50%40%
  • 8166Fri
daynightWeather update from Hyannis, Barnstable Municipal-Boardman Airport at

Dennis Average Weather

In the event that the weather data was unavailable for this city, estimates based upon nearby cities were used.
MonthTemp. (min)Temp. (max)Temp. (avg)Precipitation
January3°F57°F32°F4.3"
February3°F61°F31°F2.2"
March5°F66°F36°F3.9"
April24°F84°F46°F4.5"
May30°F88°F55°F4.3"
June43°F90°F65°F3.5"
July48°F91°F71°F3.3"
August49°F95°F71°F3.0"
September37°F85°F64°F4.3"
October27°F81°F54°F4.7"
November18°F66°F46°F3.4"
December12°F64°F36°F4.2"

Did you know?

  • The highest monthly average temperature in Dennis for July is 71 degrees.
  • The lowest monthly average temperature in Dennis for February is 31 degrees.
  • The most monthly precipitation in Dennis occurs in October with 4.7 inches.
  • The air quality index in Dennis is 33% better than the national average.
  • The pollution index in Dennis is 55% worse than the national average.

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Compare Dennis, MA Weather To Other Cities

Dennis air quality index & pollution index

In the event that the air quality/pollution data was unavailable for this city, estimates based upon nearby cities were used.
IndexDennisMassachusettsNational
Air quality index334050
Pollution index7,903,83012,377,8395,066,862

Dennis air quality information

MeasurementTotal
Days measured317
Days with good air quality308
Days with moderate air quality7
Days w/ poor A.Q. for sensitive groups2
Days with unhealthy air quality

Dennis air quality information

PollutantTotal
Arsenic0.060%
Benzene0.070%
Carbon Tetrachloride0.010%
Lead0.080%
Mercury0.030%

Average monthly Dennis temperature with heat index

Dennis monthly precipitation with daily maximum

Dennis monthly snow depth with daily maximum

Dennis monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Chatham, MA1,4293334%
East Sandwich, MA3,7353334%
New Seabury, MA9003334%
Popponesset, MA1953334%
West Chatham, MA1,4513334%
Dennis, MA2,5073334%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Eden, TX2,5073628%
Center Point, IA2,5074216%
Anza, CA2,5078570%
El Portal, FL2,5074118%
Aromas, CA2,5083628%
Dennis, MA2,5073334%
Source: The Dennis, MA weather data displayed above is derived from the NOAA (National Oceanic and Atmospheric). Air quality and pollution data is derived from the EPA (United States Environmental Protection Agency). Air quality and pollution levels measured in a particular area may not be representative of the entire county.