Dennis Port climate

Dennis Port Weather in August

NOAA 1991-2020 normals for W Harwich, 1.2 km from Dennis Port

Average highs run from 79°F on August 1 to 75°F on August 31, and lows from 66°F to 61°F. Normal precipitation for the month is 3.36 in.

August day by day

The normal high and low for each date, and the record, in °F.

Normal daily high and low temperature at Dennis Port, in °F, with the record for each date.405060708090100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

August at a glance

Average high
78°F
Average low
64°F
Precipitation
3.36 in
Record high
98°FAug 2, 2006
Record low
49°FAug 25, 2004
Chance of a freeze
0%
Daylight
14 h 23 min to 13 h 09 min
Cloud cover
60%
Humidity
87%
Dew point
65°F
Wind
12.3 mph

Every day of the month

A wet day has at least 0.01 inch of precipitation; snow means at least 0.1 inch of snowfall.

DateNormal highNormal lowRecord highRecord lowChance wetChance of snow
Aug 179°F66°F89°F 202057°F 20100%
Aug 279°F66°F98°F 200656°F 20100%
Aug 379°F66°F93°F 200655°F 20250%
Aug 479°F66°F87°F 202257°F 20250%
Aug 579°F65°F87°F 202458°F 19970%
Aug 679°F65°F89°F 201054°F 20130%
Aug 779°F65°F88°F 202254°F 20040%
Aug 878°F65°F88°F 202255°F 20040%
Aug 978°F65°F88°F 202254°F 19990%
Aug 1078°F65°F86°F 201050°F 19990%
Aug 1178°F65°F88°F 201657°F 20060%
Aug 1278°F65°F87°F 201656°F 19970%
Aug 1378°F64°F88°F 202054°F 19970%
Aug 1478°F64°F89°F 201657°F 20060%
Aug 1578°F64°F86°F 201658°F 20100%
Aug 1678°F64°F89°F 201858°F 20140%
Aug 1778°F64°F91°F 200256°F 20000%
Aug 1878°F63°F85°F 200953°F 20000%
Aug 1977°F63°F86°F 202251°F 20070%
Aug 2077°F63°F85°F 200953°F 19990%
Aug 2177°F63°F87°F 202353°F 20000%
Aug 2277°F63°F87°F 200553°F 20040%
Aug 2377°F62°F85°F 202052°F 20040%
Aug 2477°F62°F84°F 202150°F 20040%
Aug 2577°F62°F89°F 202049°F 20040%
Aug 2676°F62°F86°F 202152°F 20010%
Aug 2776°F62°F89°F 202153°F 20190%
Aug 2876°F61°F90°F 201855°F 20250%
Aug 2976°F61°F91°F 201853°F 20000%
Aug 3076°F61°F89°F 201850°F 20140%
Aug 3175°F61°F89°F 201051°F 20030%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Dennis Port, in percent, and of at least 0.1 inch of snowfall.00.21102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (EDT).

August 1
sunrise 5:35 AM, sunset 7:58 PM
August 31
sunrise 6:06 AM, sunset 7:15 PM

Every day of August: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00199227 (W Harwich), public domain. Records: NOAA GHCN-Daily, station USW00094624, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.