Rockdale climate

Rockdale Weather in August

NOAA 1991-2020 normals for Joliet Brandon Rd Dam, 0.9 km from Rockdale

Average highs run from 83°F on August 1 to 80°F on August 31, and lows from 64°F to 61°F. Normal precipitation for the month is 3.97 in over about 9 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 Rockdale, in °F, with the record for each date.20406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

August at a glance

Average high
82°F
Average low
63°F
Precipitation
3.97 in
Record high
102°FAug 2, 1988
Record low
39°FAug 29, 1986
Chance of a freeze
0%
Days of 90°F or more
3.0
Daylight
14 h 23 min to 13 h 09 min
Cloud cover
51%
Humidity
74%
Dew point
63°F
Wind
7.6 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 183°F64°F96°F 198853°F 199030%0%
Aug 283°F64°F102°F 198853°F 199030%0%
Aug 383°F64°F97°F 198851°F 197630%0%
Aug 483°F64°F98°F 198850°F 197830%0%
Aug 583°F64°F95°F 198851°F 197830%0%
Aug 683°F64°F93°F 200651°F 199430%0%
Aug 783°F64°F96°F 198451°F 198930%0%
Aug 882°F64°F98°F 198451°F 197630%0%
Aug 982°F64°F99°F 198851°F 202430%0%
Aug 1082°F64°F96°F 198451°F 198630%0%
Aug 1182°F64°F95°F 202150°F 198230%0%
Aug 1282°F64°F93°F 198850°F 197729%0%
Aug 1382°F63°F95°F 199550°F 200429%0%
Aug 1482°F63°F95°F 199551°F 200429%0%
Aug 1582°F63°F94°F 199549°F 197929%0%
Aug 1682°F63°F98°F 198846°F 202329%0%
Aug 1782°F63°F100°F 198851°F 197629%0%
Aug 1882°F63°F101°F 198851°F 197729%0%
Aug 1982°F63°F98°F 198850°F 197729%0%
Aug 2082°F63°F97°F 198353°F 197729%0%
Aug 2182°F63°F94°F 198052°F 198529%0%
Aug 2281°F63°F95°F 198350°F 198529%0%
Aug 2381°F62°F89°F 198651°F 202628%0%
Aug 2481°F62°F93°F 202350°F 198628%0%
Aug 2581°F62°F95°F 202348°F 197728%0%
Aug 2681°F62°F95°F 199147°F 201728%0%
Aug 2781°F62°F93°F 202452°F 201528%0%
Aug 2881°F62°F96°F 202440°F 198628%0%
Aug 2981°F61°F96°F 198439°F 198628%0%
Aug 3081°F61°F95°F 198442°F 198628%0%
Aug 3180°F61°F95°F 201347°F 200928%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Rockdale, in percent, and of at least 0.1 inch of snowfall.01020301102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (CDT).

August 1
sunrise 5:47 AM, sunset 8:10 PM
August 31
sunrise 6:18 AM, sunset 7:27 PM

Every day of August: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00114530 (Joliet Brandon Rd Dam), public domain. Records: NOAA GHCN-Daily, station USC00114530, 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.