The National Weather Service forecasts sunny skies here in Cobb County on Saturday, September 30, 2023, with a high near 84 degrees.

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

What does the extended forecast have in store?

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

Today

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

Tonight

Mostly clear, with a low around 64. East wind around 5 mph. 

Sunday

Sunny, with a high near 81. East wind 5 to 10 mph, with gusts as high as 15 mph. 

Sunday Night

Mostly clear, with a low around 60. East wind around 5 mph. 

Monday

Sunny, with a high near 82. East wind 5 to 10 mph. 

Monday Night

Clear, with a low around 60.

Tuesday

Sunny, with a high near 82.

Tuesday Night

Mostly clear, with a low around 59.

Wednesday

Sunny, with a high near 82.

Wednesday Night

Mostly clear, with a low around 57.

Thursday

Mostly sunny, with a high near 82.

Thursday Night

Mostly cloudy, with a low around 60.

Friday

A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 79.

What was the climate like in the latest reporting period?

The NWS climate summary for metro Atlanta has now been updated with August 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.”

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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.

Date	Max Temp	Min Temp	Average	Depature from norm	Precipitation
2023-08-01	96	73	84.5	3.3	0
2023-08-02	91	74	82.5	1.4	0
2023-08-03	92	73	82.5	1.4	0.23
2023-08-04	91	73	82	0.9	T
2023-08-05	96	74	85	4	0
2023-08-06	96	71	83.5	2.5	1.07
2023-08-07	93	71	82	1.1	0.26
2023-08-08	88	72	80	-0.9	T
2023-08-09	89	69	79	-1.8	0.03
2023-08-10	87	69	78	-2.8	0.16
2023-08-11	90	72	81	0.3	0.65
2023-08-12	94	73	83.5	2.9	0.82
2023-08-13	94	72	83	2.4	0
2023-08-14	96	76	86	5.5	0.01
2023-08-15	90	73	81.5	1.1	0.63
2023-08-16	86	67	76.5	-3.8	0
2023-08-17	87	68	77.5	-2.7	0
2023-08-18	90	69	79.5	-0.7	0
2023-08-19	89	74	81.5	1.4	0
2023-08-20	92	72	82	2	0
2023-08-21	96	75	85.5	5.7	0
2023-08-22	96	76	86	6.3	0
2023-08-23	93	81	87	7.4	0
2023-08-24	96	76	86	6.5	0
2023-08-25	98	80	89	9.6	0
2023-08-26	99	77	88	8.8	0
2023-08-27	97	77	87	7.9	T
2023-08-28	93	73	83	4	0.84
2023-08-29	90	73	81.5	2.7	0.08
2023-08-30	85	71	78	-0.7	0.46
2023-08-31	88	68	78	-0.5	0

Climate Almanac for metro Atlanta

This almanac provides information on past climate conditions for today’s date, September 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 Data	Observed	Normal	Record Highest	Record Lowest
Max Temperature	M	80	96 in 2019	56 in 1920
Min Temperature	M	61	74 in 2019	36 in 1967
Avg Temperature	M	70.6	85.0 in 2019	49.5 in 1920
Precipitation	M	0.14	4.23 in 1989	0.00 in 2021
Snowfall	M	0.0	0.0 in 2022	0.0 in 2022
Snow Depth	M	–	0 in 2022	0 in 2022
HDD (base 65)	M	1	15 in 1920	0 in 2022
CDD (base 65)	M	6	20 in 2019	0 in 2020
Month-to-Date Summary	Observed	Normal	Record Highest	Record Lowest
Avg Max Temperature	84.6	83.9	93.2 in 2019	75.2 in 1924
Avg Min Temperature	67.0	65.9	73.2 in 1925	57.0 in 1967
Avg Temperature	75.8	74.9	83.0 in 1925	66.5 in 1967
Total Precipitation	1.29	3.82	14.26 in 1888	0.04 in 1984
Total Snowfall	0.0	0.0	0.0 in 2023	0.0 in 2023
Max Snow Depth	0	–	0 in 2023	0 in 2023
Total HDD (base 65)	0	5	52 in 1967	0 in 2023
Total CDD (base 65)	320	302	546 in 1925	103 in 1967
Year-to-Date Summary	Observed	Normal	Record Highest	Record Lowest
Avg Max Temperature	78.1	76.0	78.6 in 2019	70.1 in 1885
Avg Min Temperature	59.6	56.9	59.7 in 2019	51.1 in 1940
Avg Temperature	68.8	66.5	69.2 in 2019	61.5 in 1940
Total Precipitation	33.57	38.60	56.81 in 1920	22.56 in 1931
Total Snowfall (since July 1)	0.0	0.0	T in 2001	0.0 in 2023
Max Snow Depth (since July 1)	0	–	T in 1942	0 in 2023
Total HDD (since July 1)	0	5	52 in 1967	0 in 2023
Total CDD (since Jan 1)	2104	1950	2477 in 2019	1149 in 1967

Period of Record:

• Max Temperature : 1878-10-04 to 2023-09-29
• Min Temperature : 1878-10-04 to 2023-09-29
• Precipitation : 1878-10-01 to 2023-09-29
• Snowfall : 1928-12-25 to 2023-09-29
• Snow Depth : 1928-12-25 to 2023-09-29

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.”