Cobb County weather forecast for Monday, May 20, 2024

Photo of Veterans Memorial Highway on a clear day with the Cobb County Courier logo and the words "Weather forecast"

The National Weather Service forecasts sunny skies here in Cobb County on Monday, May 20, 2024, with a high near 84 degrees.

Tonight it is expected to be mostly clear, with an overnight low of around 64 degrees.

What you will read in this article

  1. The extended forecast for Cobb County
  2. Last month’s climate summary for the metro Atlanta region
  3. The climate almanac for metro Atlanta
  4. What the National Weather Service is, and what it does

What does the extended forecast have in store?

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


Sunny, with a high near 84. Calm wind becoming east around 5 mph in the morning.


Mostly clear, with a low around 64. Calm wind.


Sunny, with a high near 86. Calm wind becoming southeast around 5 mph in the afternoon.

Tuesday Night

Mostly clear, with a low around 63. Southeast wind around 5 mph becoming calm.


Sunny, with a high near 88. Calm wind becoming south around 5 mph in the afternoon.

Wednesday Night

Partly cloudy, with a low around 66.


Partly sunny, with a high near 88.

Thursday Night

A 20 percent chance of showers after 2 a.m. Mostly cloudy, with a low around 67.


A chance of showers, with thunderstorms also possible after 2 p.m. Partly sunny, with a high near 87. Chance of precipitation is 40 percent.

Friday Night

A chance of showers and thunderstorms. Partly cloudy, with a low around 66. Chance of precipitation is 40 percent.


A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 88.

Saturday Night

A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 66.


A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 88.

What was the climate like in the latest reporting period?

The NWS climate summary for metro Atlanta has now been updated with April 2024 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.

DateHighLowAverageDeparture from normPrecipitation

Climate Almanac for metro Atlanta

This almanac provides information on past climate conditions for today’s date, May 20, 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 TemperatureM8294 in 194152 in 1894
Min TemperatureM6371 in 201939 in 1894
Avg TemperatureM72.381.0 in 199645.5 in 1894
PrecipitationM0.103.28 in 18880.00 in 2022
SnowfallM0.00.0 in 20230.0 in 2023
Snow DepthM0 in 20230 in 2023
HDD (base 65)M019 in 18940 in 2023
CDD (base 65)M816 in 19960 in 2020
Month-to-Date SummaryObservedNormalRecord HighestRecord Lowest
Avg Max Temperature81.279.985.5 in 193671.2 in 1917
Avg Min Temperature64.659.765.7 in 189950.9 in 1973
Avg Temperature72.969.875.2 in 189961.3 in 1954
Total Precipitation1.052.278.12 in 20030.04 in 1896
Total Snowfall0.00.0T in 19530.0 in 2024
Max Snow Depth00 in 20240 in 2024
Total HDD (base 65)019104 in 19170 in 2024
Total CDD (base 65)156116211 in 189919 in 1973
Year-to-Date SummaryObservedNormalRecord HighestRecord Lowest
Avg Max Temperature67.465.470.1 in 201758.1 in 1895
Avg Min Temperature48.145.550.1 in 201737.8 in 1940
Avg Temperature57.755.460.1 in 201748.3 in 1940
Total Precipitation25.0819.9036.20 in 19299.46 in 1916
Total Snowfall (since July 1)T2.210.9 in 19360.0 in 2019
Max Snow Depth (since July 1)08 in 19400 in 2024
Total HDD (since July 1)204025403832 in 19771690 in 2017
Total CDD (since Jan 1)264199350 in 201245 in 1973

Period of Record:

  • Max Temperature : 1878-10-04 to 2024-05-19
  • Min Temperature : 1878-10-04 to 2024-05-19
  • Precipitation : 1878-10-01 to 2024-05-19
  • Snowfall : 1928-12-25 to 2024-05-19
  • Snow Depth : 1928-12-25 to 2024-05-19

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

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.”