Cobb County weather forecast for Wednesday, August 30, 2023

Cobb weather May 18: Photo of cloudy skies above a residential street

The National Weather Service forecasts cloudy skies here in Cobb County on Wednesday, August 30, 2023, with a high near 80 degrees.

The National Weather Service has also issued a hazardous weather outlook for Cobb County and other parts of the region due to heavy rainfall that will remain the primary concern with localized flash flooding possible, especially in north Georgia as the current storms are generally stationary.

Mableton near Nickajack Creek is under a flood warning until further notice.

What does the extended forecast have in store?

This forecast is centered on Dobbins Air Reserve Base in Marietta.


A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 5 p.m. Cloudy, with a high near 80. Northeast wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 60 percent.

Wednesday Night

Showers and thunderstorms likely before 1 a.m, then a slight chance of showers between 1 a.m and 2 a.m. Mostly cloudy, with a low around 64. North wind 5 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 60 percent. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.


Sunny, with a high near 84. Northwest wind around 5 mph becoming southwest in the afternoon.

Thursday Night

Partly cloudy, with a low around 65. East wind around 5 mph.


Mostly sunny, with a high near 82.

Friday Night

Partly cloudy, with a low around 64.


Sunny, with a high near 85.

Saturday Night

Mostly clear, with a low around 63.


Sunny, with a high near 87.

Sunday Night

Mostly clear, with a low around 64.

Labor Day

Sunny, with a high near 89.

Monday Night

Mostly clear, with a low around 65.


Sunny, with a high near 89.

What was the climate like in the latest reporting period?

The NWS climate summary for metro Atlanta has now been updated with July 2023 figures.

In an article entitled What is the Difference between Climate and Weather?, the National Ocean Service describes the difference as follows:

“Weather is what you see outside on any particular day. So, for example, it may be 75° degrees and sunny or it could be 20° degrees with heavy snow. That’s the weather.

“Climate is the average of that weather. For example, you can expect snow in the Northeast in January or for it to be hot and humid in the Southeast in July. This is climate. The climate record also includes extreme values such as record high temperatures or record amounts of rainfall. If you’ve ever heard your local weather person say “today we hit a record high for this day,” she is talking about climate records.

“So when we are talking about climate change, we are talking about changes in long-term averages of daily weather. In most places, weather can change from minute-to-minute, hour-to-hour, day-to-day, and season-to-season. Climate, however, is the average of weather over time and space.”

The climate report for the Atlanta area for the previous month shows how much departure from the average temperatures that month represents. The average temperature for a date is the average over a 30-year period.

DateMax TempMin TempAverageDeparture from normPrecipitation

Climate Almanac for metro Atlanta

This almanac provides information on past climate conditions for today’s date, August 30, allowing a comparison to current weather. Simply put, it helps you see what the weather would typically be like on this day according to historical data.

Daily DataObservedNormalRecord HighestRecord Lowest
Max TemperatureM8798 in 194863 in 1986
Min TemperatureM7076 in 193255 in 1986
Avg TemperatureM78.785.5 in 194859.0 in 1986
PrecipitationM0.144.22 in 18850.00 in 2019
SnowfallM0.00.0 in 20220.0 in 2022
Snow DepthM0 in 20220 in 2022
HDD (base 65)M06 in 19860 in 2022
CDD (base 65)M1421 in 19480 in 1986
Month-to-Date SummaryObservedNormalRecord HighestRecord Lowest
Avg Max Temperature92.689.196.3 in 200780.9 in 1879
Avg Min Temperature73.271.475.3 in 200765.7 in 1967
Avg Temperature82.980.285.8 in 200773.9 in 1879
Total Precipitation4.784.1710.02 in 19200.02 in 1925
Total Snowfall0.00.00.0 in 20230.0 in 2023
Max Snow Depth00 in 20230 in 2023
Total HDD (base 65)006 in 19860 in 2023
Total CDD (base 65)525456632 in 2007276 in 1879
Year-to-Date SummaryObservedNormalRecord HighestRecord Lowest
Avg Max Temperature77.275.077.9 in 201269.2 in 1895
Avg Min Temperature58.655.858.6 in 202350.0 in 1940
Avg Temperature67.965.468.1 in 201260.2 in 1940
Total Precipitation31.8234.6553.45 in 192019.83 in 2007
Total Snowfall (since July 1)0.00.0T in 20010.0 in 2023
Max Snow Depth (since July 1)0T in 19420 in 2023
Total HDD (since July 1)006 in 19860 in 2023
Total CDD (since Jan 1)175816351946 in 20111037 in 1967

Period of Record:

  • Max Temperature : 1878-10-04 to 2023-08-29
  • Min Temperature : 1878-10-04 to 2023-08-29
  • Precipitation : 1878-10-01 to 2023-08-29
  • Snowfall : 1928-12-25 to 2023-08-29
  • Snow Depth : 1928-12-25 to 2023-08-29

For much more information on the climate in our area, visit the NWS Climate FAQ for the Atlanta area.

Climate and climate change coverage in the Cobb County Courier

Looking for a US ‘climate haven’ away from heat and disaster risks? Good luck finding one

Extreme Heat Is Particularly Hard On Older Adults, And An Aging Population And Climate Change Are Putting Ever More People At Risk

How Climate Change Intensifies The Water Cycle, Fueling Extreme Rainfall And Flooding – The Northeast Deluge Was Just The Latest

Republicans’ Anti-ESG Attack May Be Silencing Insurers, But It Isn’t Changing Their Pro-Climate Business Decisions

KSU Professor Awarded NSF Grant To Study Effects Of Climate Change On Farming Communities In Iceland And Greenland

What does the National Weather Service do?

The National Weather Service (NWS) is a part of the National Oceanic and Atmospheric Administration (NOAA).

The NWS describes its role as follows:

“The National Weather Service (NWS) provides weather, water, and climate forecasts and warnings for the United States, its territories, adjacent waters and ocean areas, for the protection of life and property and the enhancement of the national economy. 

“These services include Forecasts and Observations, Warnings, Impact-based Decision Support Services, and Education in an effort to build a Weather-Ready Nation. The ultimate goal is to have a society that is prepared for and responds to weather, water and climate events.”