Mount Pleasant climate

Mount Pleasant Weather in August

NOAA 1991-2020 normals for Sullivans Is, 3.6 km from Mount Pleasant

Average highs run from 91°F on August 1 to 89°F on August 31, and lows from 73°F to 71°F. Normal precipitation for the month is 6.72 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 Mount Pleasant, in °F, with the record for each date.5060708090100110151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

August at a glance

Average high
90°F
Average low
72°F
Precipitation
6.72 in
Record high
103°FAug 2, 1999
Record low
55°FAug 31, 2010
Chance of a freeze
0%
Days of 90°F or more
16.1
Daylight
13 h 45 min to 12 h 51 min
Cloud cover
57%
Humidity
79%
Dew point
73°F
Wind
5.6 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 191°F73°F100°F 195863°F 19970%
Aug 291°F73°F103°F 199961°F 19660%
Aug 391°F73°F97°F 195363°F 20170%
Aug 491°F73°F98°F 200664°F 20070%
Aug 591°F73°F102°F 195459°F 19860%
Aug 691°F73°F100°F 201064°F 19690%
Aug 791°F73°F100°F 196863°F 20040%
Aug 891°F73°F100°F 201064°F 19780%
Aug 991°F73°F100°F 201161°F 19890%
Aug 1091°F73°F98°F 201163°F 19890%
Aug 1190°F72°F97°F 201962°F 19890%
Aug 1290°F72°F99°F 200865°F 19670%
Aug 1390°F72°F98°F 199560°F 20070%
Aug 1490°F72°F98°F 199562°F 19790%
Aug 1590°F72°F101°F 198963°F 20080%
Aug 1690°F72°F98°F 201165°F 20130%
Aug 1790°F72°F98°F 195867°F 19710%
Aug 1890°F72°F97°F 199562°F 19670%
Aug 1990°F72°F98°F 198368°F 19600%
Aug 2090°F72°F95°F 196667°F 19570%
Aug 2190°F72°F97°F 196864°F 20070%
Aug 2290°F72°F97°F 200564°F 19980%
Aug 2390°F72°F98°F 198765°F 19770%
Aug 2489°F71°F99°F 201462°F 19810%
Aug 2589°F71°F97°F 198261°F 19810%
Aug 2689°F71°F97°F 196564°F 19520%
Aug 2789°F71°F101°F 198963°F 19660%
Aug 2889°F71°F96°F 199060°F 19680%
Aug 2989°F71°F98°F 201057°F 19860%
Aug 3089°F71°F99°F 198960°F 19860%
Aug 3189°F71°F98°F 198955°F 20100%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Mount Pleasant, 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 6:33 AM, sunset 8:18 PM
August 31
sunrise 6:54 AM, sunset 7:45 PM

Every day of August: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00388405 (Sullivans Is), public domain. Records: NOAA GHCN-Daily, station USC00388405, 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.