The National Weather Service forecasts mostly cloudy skies here in Cobb County on Monday, July 29, 2024, with a high near 85 degrees.

The National Weather Service has issued a hazardous weather outlook for Cobb County and other parts of the region due to scattered to numerous thunderstorms that are expected this afternoon and evening. A few strong to severe storms with damaging winds may also occur, in addition to frequent lightning and heavy rainfall. Localized flash flooding will be possible across much of north Georgia and portions of central Georgia.

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.

Today

Showers and thunderstorms likely, mainly between 1 p.m and 5 p.m. Mostly cloudy, with a high near 85. Calm wind becoming west around 5 mph in the morning. Chance of precipitation is 70 percent. New rainfall amounts between a quarter and half of an inch possible.

Tonight

A 30 percent chance of showers and thunderstorms, mainly before 8 p.m. Partly cloudy, with a low around 72. West wind around 5 mph becoming calm in the evening.

Tuesday

A 50 percent chance of showers and thunderstorms, mainly after 11 a.m. Mostly sunny, with a high near 91. Heat index values as high as 103. West wind 5 to 10 mph.

Tuesday Night

A 20 percent chance of showers and thunderstorms before 2 a.m. Partly cloudy, with a low around 73. West wind around 5 mph becoming calm in the evening.

Wednesday

A 40 percent chance of showers and thunderstorms after 2 p.m. Mostly sunny, with a high near 94. West wind around 5 mph.

Wednesday Night

A 30 percent chance of showers and thunderstorms before 8 p.m. Mostly clear, with a low around 73.

Thursday

A 20 percent chance of showers and thunderstorms after 2 p.m. Sunny, with a high near 96.

Thursday Night

A 10 percent chance of showers and thunderstorms before 8 p.m. Mostly clear, with a low around 75.

Friday

A 30 percent chance of showers and thunderstorms after 2 p.m. Sunny, with a high near 96.

Friday Night

A 30 percent chance of showers and thunderstorms, mainly before 8 p.m. Partly cloudy, with a low around 73.

Saturday

A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 93.

Saturday Night

A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 72.

Sunday

A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 92.

What was the climate like in the latest reporting period?

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

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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	Min	Average	Departure from norm	Precipitation
2024-06-01	78	65	71.5	-3.6	0
2024-06-02	85	67	76	0.6	0.06
2024-06-03	89	69	79	3.4	T
2024-06-04	86	70	78	2.2	T
2024-06-05	86	72	79	3	0.17
2024-06-06	85	70	77.5	1.3	0.1
2024-06-07	88	70	79	2.6	0
2024-06-08	87	63	75	-1.6	0
2024-06-09	93	70	81.5	4.7	0
2024-06-10	85	69	77	0	0.4
2024-06-11	87	64	75.5	-1.7	0
2024-06-12	89	71	80	2.6	0
2024-06-13	90	72	81	3.4	0
2024-06-14	95	72	83.5	5.8	0
2024-06-15	97	76	86.5	8.6	0.02
2024-06-16	96	75	85.5	7.4	0
2024-06-17	93	75	84	5.7	T
2024-06-18	91	73	82	3.6	0
2024-06-19	89	71	80	1.4	0
2024-06-20	90	73	81.5	2.8	0
2024-06-21	93	71	82	3.1	0
2024-06-22	98	74	86	7	0
2024-06-23	98	77	87.5	8.3	0
2024-06-24	97	75	86	6.7	0.21
2024-06-25	98	72	85	5.6	0
2024-06-26	100	75	87.5	7.9	0
2024-06-27	91	75	83	3.3	T
2024-06-28	91	75	83	3.2	0.13
2024-06-29	91	76	83.5	3.6	0.65
2024-06-30	97	77	87	7	0

Climate Almanac for metro Atlanta

This almanac provides information on past climate conditions for today’s date, July 29, 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	90	103 in 1952	73 in 1984
Min Temperature	M	72	77 in 2023	63 in 1977
Avg Temperature	M	81.2	89.0 in 1952	69.5 in 1977
Precipitation	M	0.13	2.65 in 1988	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
HDD (base 65)	M	0	0 in 2023	0 in 2023
CDD (base 65)	M	16	24 in 1993	5 in 1984
Month-to-Date Summary	Observed	Normal	Record Highest	Record Lowest
Avg Max Temperature	90.8	90.1	96.9 in 1993	82.6 in 1967
Avg Min Temperature	74.2	71.8	74.7 in 1980	65.4 in 1967
Avg Temperature	82.5	80.9	85.6 in 1993	74.0 in 1967
Total Precipitation	12.70	4.49	15.66 in 1994	0.56 in 1881
Total Snowfall	0.0	0.0	T in 2001	0.0 in 2024
Max Snow Depth	0	–	T in 1942	0 in 2024
Total HDD (base 65)	0	0	4 in 1892	0 in 2024
Total CDD (base 65)	499	462	604 in 1993	269 in 1967
Year-to-Date Summary	Observed	Normal	Record Highest	Record Lowest
Avg Max Temperature	74.9	72.8	76.4 in 2012	66.7 in 1895
Avg Min Temperature	56.1	53.3	56.6 in 2017	47.1 in 1940
Avg Temperature	65.5	63.1	66.5 in 2012	57.4 in 1940
Total Precipitation	41.42	30.22	47.07 in 1912	16.36 in 1986
Total Snowfall (since July 1)	0.0	0.0	T in 2001	0.0 in 2024
Max Snow Depth (since July 1)	0	–	T in 1942	0 in 2024
Total HDD (since July 1)	0	0	4 in 1892	0 in 2024
Total CDD (since Jan 1)	1404	1146	1424 in 2012	686 in 1961

Period of Record:

• Max Temperature : 1878-10-04 to 2024-07-28
• Min Temperature : 1878-10-04 to 2024-07-28
• Precipitation : 1878-10-01 to 2024-07-28
• Snowfall : 1928-12-25 to 2024-07-28
• Snow Depth : 1928-12-25 to 2024-07-28

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.”