Cobb Climate Almanac and Weather Forecast for Monday, September 23, 2024

The National Weather Service is forecasting sunny weather with highs of around 93 degrees here in Cobb County for Monday, September 23, 2024.

The National Weather Service has issued a hazardous weather forecast for Cobb County and other parts of the region, as isolated thunderstorms are possible in north and central Georgia this afternoon and evening.

What you will read in this article

The extended forecast for Cobb County
Climate overview of the last month for the Atlanta metropolitan area
The Climate Almanac for the Atlanta Metropolitan Region
What the National Weather Service is and what it does

What does the extended forecast hold?

This forecast focuses on Dobbins Air Force Base in Marietta.

Today

A 30% chance of showers and thunderstorms, especially after 4 p.m. Sunny, with a high around 93 degrees. Heat index values as high as 97 degrees. Calm, with a northwest wind around 5 mph in the afternoon.

Tonight

30% chance of showers and thunderstorms, mainly before 7pm. Partly cloudy, low around 22°C. West wind around 8 km/h, decreasing.

Tuesday

After 3 p.m. there is a 20 percent chance of showers and thunderstorms. Mostly sunny, high around 90 degrees. Light and variable wind turning southwest 5 to 10 mph in the afternoon.

Tuesday night

40% chance of rain showers and thunderstorms, especially after 8pm. Mostly cloudy, low temperature around 20°C. South wind around 8 km/h.

Wednesday

Showers and thunderstorms possible, then showers and possible thunderstorms likely after 2pm. Mostly cloudy, high around 28°C. Southeast wind 5 to 10 mph, gusting to 15 mph. 60% chance of precipitation.

Wednesday night

Chance of showers and possibly a thunderstorm before 2 a.m., with a chance of showers afterward. Mostly cloudy, low around 68. Chance of precipitation is 60 percent.

Thursday

There is a chance of showers, then showers are likely and thunderstorms are possible after 2 p.m. Cloudy, high around 77 degrees. Chance of precipitation is 60 percent.

Thursday night

Showers and a possible thunderstorm are likely before 2am, then a chance of showers and thunderstorms after 2am. Mostly cloudy, with a low of around 66°C. The chance of precipitation is 70%.

Friday

50% chance of showers and thunderstorms. Partly sunny, high around 77°F.

Friday night

There is a 30 percent chance of showers and thunderstorms before 2 a.m. Partly cloudy, low around 64.

Saturday

20% chance of rain. Mostly sunny, high temperature around 25°C.

Saturday night

20% chance of rain. Mostly cloudy, low around 64.

Sunday

30% chance of rain. Partly sunny, high temperature around 25°C.

What was the climate like in the last reporting period?

The NWS climate summary for the Atlanta metropolitan area has now been updated with August 2024 figures.

In an article titled “What is the difference between climate and weather?” the National Ocean Service describes the difference as follows:

“Weather is what you see outside on a given day. For example, it could be 24°C and sunny, or -6°C and heavy snowfall. That's the weather.”

“Climate is the average of this weather. For example, you can expect snow in the northeast in January or hot and humid in the southeast in July. That is climate. Climate records also include extremes such as record temperatures or record amounts of precipitation. If you have ever heard your local weather report say, “Today we reached a record temperature for this day,” they are talking about climate records.

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

The climate report for the Atlanta region for the previous month shows how much the deviation is from the average temperatures of that month. The average temperature for a date is the average over a period of 30 years.

Date	Max	Minimum	Average	Deviation from the norm	precipitation
01.08.2024	94	74	84	2.8	0
02.08.2024	93	77	85	3.9	0.04
03.08.2024	91	74	82.5	1.4	0
04.08.2024	91	74	82.5	1.4	T
05.08.2024	92	75	83.5	2.5	T
06.08.2024	93	77	85	4	0
07.08.2024	96	74	85	4.1	0
08.08.2024	96	77	86.5	5.6	0
09.08.2024	95	76	85.5	4.7	0
10.08.2024	93	73	83	2.2	0
11.08.2024	92	69	80.5	-0.2	0
12.08.2024	92	70	81	0.4	0
13.08.2024	93	71	82	1.4	0
14.08.2024	92	76	84	3.5	0
15.08.2024	90	74	82	1.6	0
16.08.2024	91	72	81.5	1.2	0.39
17.08.2024	95	71	83	2.8	0.11
18.08.2024	91	72	81.5	1.3	0.23
19.08.2024	89	70	79.5	-0.6	0
20.08.2024	89	70	79.5	-0.5	0
21.08.2024	85	67	76	-3.8	0
22.08.2024	85	69	77	-2.7	0
23.08.2024	85	65	75	-4.6	0
24.08.2024	88	66	77	-2.5	0
25.08.2024	90	69	79.5	0.1	0
26.08.2024	92	70	81	1.8	0
27.08.2024	94	71	82.5	3.4	0
28.08.2024	97	74	85.5	6.5	0
29.08.2024	98	76	87	8.2	0
30.08.2024	96	75	85.5	6.8	0.03
31.08.2024	M	M	M	M	M

Climate Almanac for the Atlanta Metropolitan Region

This almanac provides information on past climate conditions for September 23rd and allows comparisons with the current weather.

Simply put, it helps you see what the weather would typically be like on that day based on historical data.

Daily data	Observed	Normal	Record high	Record low
Maximum temperature	M	82	94 in 1931	61 in 1995
Min. temperature	M	64	75 in 1931	45 in 1982
Average temperature	M	73.0	84.5 in 1931	57.0 in 1995
precipitation	M	0.13	2.00 in 1889	0.00 in 2023
Snowfall	M	0.0	0.0 in 2023	0.0 in 2023
Snow depth	M	–	0 in 2023	0 in 2023
Hard drive (base 65)	M	0	8 in 1995	0 in 2023
CDD (Base 65)	M	8	20 in 1931	0 in 2021
Monthly overview	Observed	Normal	Record high	Record low
Average maximum temperature	85.0	84.8	95.5 in 1925	77.1 in 1918
Average minimum temperature	68.3	67.0	74.5 in 1925	59.3 in 1976
Average temperature	76.6	75.9	85.0 in 1925	68.5 in 1967
Total precipitation	1.15	2.87	14.26 in 1888	T in 1984
Total snowfall	0.0	0.0	0.0 in 2024	0.0 in 2024
Maximum snow depth	0	–	0 in 2024	0 in 2024
Total HDD (base 65)	0	2	37 in 1918	0 in 2024
Total CDD (Base 65)	261	252	465 in 1925	95 in 1967
Annual overview	Observed	Normal	Record high	Record low
Average maximum temperature	77.9	75.9	78.5 in 2012	70.1 in 1885
Average minimum temperature	59.1	56.7	59.5 in 2023	51.1 in 1940
Average temperature	68.5	66.3	68.8 in 2019	61.5 in 1940
Total precipitation	44.69	37.65	55.58 in 1920	22.45 in 1931
Total snowfall (since July 1)	0.0	0.0	T in 2001	0.0 in 2024
Maximum snow depth (since July 1)	0	–	T in 1942	0 in 2024
Total HDD (since July 1)	0	2	37 in 1918	0 in 2024
Total CDD (since 1 January)	2253	1901	2349 in 2019	1141 in 1967

Recording period:

Maximum temperature: 04.10.1878 to 22.09.2024
Min. temperature: 04.10.1878 to 22.09.2024
Precipitation: 01.10.1878 to 22.09.2024
Snowfall: 25.12.1928 to 22.09.2024
Snow depth: 25.12.1928 to 22.09.2024

For more information about the climate in our region, see the NWS Climate FAQs for the Atlanta Region.

What does the National Weather Service do?

The National Weather Service (NWS) is 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 alerts for the United States, its territories, and adjacent waters and marine areas, to protect life and property and to strengthen the national economy.

“These services include forecasts and observations, warnings, impact-based decision support services and education in an effort to build a weather-resilient nation. The ultimate goal is a society that is prepared for and responsive to weather, water and climate events.”