The National Weather Service forecasts sunny skies here in Cobb County on Wednesday, July 12, 2023, with a high near 91 degrees.

The National Weather Service has issued a hazardous weather outlook for Cobb County and other parts of the region due to isolated thunderstorms that will be possible across portions of west and central Georgia this afternoon and evening.

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 91. Calm wind becoming southwest around 5 mph in the afternoon.

Tonight

Mostly clear, with a low around 72. Southwest wind around 5 mph.

Thursday

A slight chance of showers, then a chance of showers and thunderstorms after 9 a.m. Mostly sunny, with a high near 91. Heat index values as high as 99. Southwest wind 5 to 10 mph, with gusts as high as 15 mph. Chance of precipitation is 40 percent.

Thursday Night

A 30 percent chance of showers and thunderstorms, mainly before 2 a.m. Mostly cloudy, with a low around 72. Southwest wind 5 to 10 mph.

Friday

A chance of showers, with thunderstorms also possible after 11 a.m. Partly sunny, with a high near 91. West wind 5 to 10 mph, with gusts as high as 15 mph. Chance of precipitation is 50 percent.

Friday Night

A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 72.

Saturday

Showers and thunderstorms likely, mainly after 2 p.m. Partly sunny, with a high near 92. Chance of precipitation is 60 percent.

Saturday Night

Showers and thunderstorms likely, mainly before 8 p.m. Mostly cloudy, with a low around 72. Chance of precipitation is 60 percent.

Sunday

A 40 percent chance of showers and thunderstorms, mainly after 2 p.m. Mostly sunny, with a high near 91.

Sunday Night

A 30 percent chance of showers and thunderstorms before 8 p.m. Partly cloudy, with a low around 71.

Monday

A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 91.

Monday Night

A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 71.

Tuesday

A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 93.

What was the climate like in the latest reporting period?

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

The June metro Atlanta climate summary

Date	Temperature				Precipitation
	Maximum	Minimum	Average	Departure
2023-06-01	84	64	74	-1.1	0
2023-06-02	87	68	77.5	2.1	0
2023-06-03	89	67	78	2.4	0
2023-06-04	82	68	75	-0.8	0.52
2023-06-05	84	64	74	-2	0
2023-06-06	90	68	79	2.8	T
2023-06-07	90	69	79.5	3.1	0
2023-06-08	85	70	77.5	0.9	0
2023-06-09	85	66	75.5	-1.3	0
2023-06-10	87	63	75	-2	0
2023-06-11	84	67	75.5	-1.7	0.67
2023-06-12	81	66	73.5	-3.9	0.18
2023-06-13	79	63	71	-6.6	0
2023-06-14	76	67	71.5	-6.2	0.84
2023-06-15	82	68	75	-2.9	0
2023-06-16	88	71	79.5	1.4	0
2023-06-17	90	69	79.5	1.2	0
2023-06-18	86	69	77.5	-0.9	T
2023-06-19	78	67	72.5	-6.1	1
2023-06-20	85	70	77.5	-1.2	0.03
2023-06-21	76	66	71	-7.9	0.37
2023-06-22	81	65	73	-6	0.05
2023-06-23	85	69	77	-2.2	0
2023-06-24	88	67	77.5	-1.8	0
2023-06-25	92	68	80	0.6	0.67
2023-06-26	91	67	79	-0.6	0
2023-06-27	89	72	80.5	0.8	0
2023-06-28	90	70	80	0.2	0
2023-06-29	92	72	82	2.1	0
2023-06-30	90	72	81	1	0.05
Observations for each day cover the 24 hours ending at the time given below (Local Standard Time).
Max Temperature : midnight
Min Temperature : midnight
Precipitation : midnight

Here is the daily almanac for July 12, 2023 giving record and average temperatures for this day. Most of the figures are self-explanatory, but you can visit the climate page for the region for further explanation.

Daily Data	Observed	Normal	Record Highest	Record Lowest
Max Temperature	M	90	103 in 1980	70 in 1898
Min Temperature	M	72	80 in 1980	58 in 1898
Avg Temperature	M	81	91.5 in 1980	64.0 in 1898
Precipitation	M	0.17	1.89 in 2009	0.00 in 2022
Snowfall	M	0	0.0 in 2022	0.0 in 2022
Snow Depth	M	–	0 in 2022	0 in 2022
HDD (base 65)	M	0	1 in 1898	0 in 2022
CDD (base 65)	M	16	27 in 1980	0 in 1898
Month-to-Date Summary	Observed	Normal	Record Highest	Record Lowest
Avg Max Temperature	91.2	89.8	96.5 in 1980	76.9 in 1892
Avg Min Temperature	72.5	71.4	75.2 in 1980	63.7 in 1940
Avg Temperature	81.8	80.6	85.8 in 1980	71.0 in 1892
Total Precipitation	1.54	2.04	13.05 in 2005	0.00 in 1879
Total Snowfall	0	0	T in 2001	0.0 in 2023
Max Snow Depth	0	–	0 in 2023	0 in 2023
Total HDD (base 65)	0	0	4 in 1892	0 in 2023
Total CDD (base 65)	188	187	254 in 1980	79 in 1892
Year-to-Date Summary	Observed	Normal	Record Highest	Record Lowest
Avg Max Temperature	73.1	71.3	74.9 in 2012	64.9 in 1895
Avg Min Temperature	54.8	51.7	55.2 in 1880	45.0 in 1940
Avg Temperature	64	61.5	65.0 in 2012	55.4 in 1940
Total Precipitation	26.85	27.77	46.40 in 1912	13.36 in 1986
Total Snowfall (since July 1)	0	0	T in 2001	0.0 in 2023
Max Snow Depth (since July 1)	0	–	0 in 2023	0 in 2023
Total HDD (since July 1)	0	0	4 in 1892	0 in 2023
Total CDD (since Jan 1)	853	871	1105 in 2012	472 in 1972
Period of Record:
Max Temperature : 1878-10-04 to 2023-07-11
Min Temperature : 1878-10-04 to 2023-07-11
Precipitation : 1878-10-01 to 2023-07-11
Snowfall : 1928-12-25 to 2023-07-10
Snow Depth : 1928-12-25 to 2023-07-09

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.”