Hyannis climate

Hyannis Weather in August

NOAA 1991-2020 normals for Whitman 5 Ene, 27.2 km from Hyannis

Average highs run from 85°F on August 1 to 81°F on August 31, and lows from 61°F to 55°F. Normal precipitation for the month is 2.02 in over about 8 wet days.

August day by day

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

Normal daily high and low temperature at Hyannis, in °F, with the record for each date.20406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

August at a glance

Average high
84°F
Average low
58°F
Precipitation
2.02 in
Record high
107°FAug 13, 2007
Record low
33°FAug 11, 2004
Chance of a freeze
0%
Days of 90°F or more
7.1
Daylight
14 h 24 min to 13 h 10 min
Cloud cover
46%
Humidity
55%
Dew point
53°F
Wind
9.8 mph

Every day of the month

A wet day has at least 0.01 inch of precipitation.

DateNormal highNormal lowRecord highRecord lowChance wet
Aug 185°F61°F102°F 200043°F 200927%
Aug 285°F61°F106°F 200846°F 200927%
Aug 385°F61°F102°F 201249°F 201727%
Aug 485°F61°F102°F 202448°F 202627%
Aug 585°F60°F104°F 202243°F 202627%
Aug 685°F60°F102°F 201250°F 199727%
Aug 785°F60°F103°F 202539°F 199627%
Aug 885°F60°F98°F 200149°F 202127%
Aug 984°F60°F101°F 200747°F 200726%
Aug 1084°F60°F101°F 200741°F 200226%
Aug 1184°F60°F102°F 200633°F 200426%
Aug 1284°F59°F99°F 199637°F 200426%
Aug 1384°F59°F107°F 200738°F 200226%
Aug 1484°F59°F102°F 200042°F 202326%
Aug 1584°F59°F101°F 201546°F 202326%
Aug 1684°F59°F105°F 200244°F 200126%
Aug 1784°F58°F101°F 202143°F 200226%
Aug 1883°F58°F103°F 202342°F 200125%
Aug 1983°F58°F99°F 201938°F 200425%
Aug 2083°F58°F98°F 200038°F 200425%
Aug 2183°F57°F103°F 202339°F 200925%
Aug 2283°F57°F101°F 202341°F 201725%
Aug 2383°F57°F103°F 200639°F 201525%
Aug 2483°F57°F100°F 200040°F 201025%
Aug 2582°F56°F103°F 202043°F 201525%
Aug 2682°F56°F100°F 200746°F 201925%
Aug 2782°F56°F101°F 201238°F 200425%
Aug 2882°F56°F103°F 201233°F 200425%
Aug 2982°F55°F103°F 201238°F 200425%
Aug 3081°F55°F100°F 200040°F 202425%
Aug 3181°F55°F98°F 201236°F 202024%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Hyannis, in percent.01020301102030
  • Chance of a wet day

Sunrise and sunset

Times for 2026, local time (MDT).

August 1
sunrise 5:41 AM, sunset 8:05 PM
August 31
sunrise 6:12 AM, sunset 7:22 PM

Every day of August: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USW00094079 (Whitman 5 Ene), public domain. Records: NOAA GHCN-Daily, station USW00024044, 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 2026-09-25. Sun and moon: computed with the NOAA solar equations and Meeus.