The National Weather Service forecasts mostly sunny skies here in Cobb County on Saturday, July 18, 2026, 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 scattered thunderstorms this afternoon and evening that will be capable of producing locally heavy rainfall, frequent lightning, and gusty to locally damaging winds. Heavy rain could elevate the risk for localized flash flooding.
A Heat Advisory is also in effect through this evening for much of east and parts of central Georgia where heat index values in excess of 105 degrees are expected.
73°F
Bonus for the more weather-curious among you … To read an article about interpreting a weather news report with some of the typical terminology defined, follow this link.
To read an article about interpreting a weather news report, with some of the typical terminology defined, follow this link.
What does the extended forecast have in store?
This forecast is centered on Dobbins Air Reserve Base in Marietta.
Today
A 20 percent chance of showers and thunderstorms after 3 p.m. Mostly sunny, with a high near 91. Heat index values as high as 101. Northwest wind 5 to 10 mph, with gusts as high as 15 mph.
Tonight
A slight chance of showers and thunderstorms before 8 p.m, then a slight chance of showers between 8 p.m and 10 p.m. Mostly clear, with a low around 73. Northwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 20 percent.
Sunday
A 30 percent chance of showers and thunderstorms, mainly after 4 p.m. Sunny, with a high near 92. Heat index values as high as 101. Northwest wind 5 to 10 mph.
Sunday Night
A chance of showers and thunderstorms before 11 p.m, then a slight chance of showers between 11 p.m and 2 a.m. Partly cloudy, with a low around 73. West wind around 5 mph becoming calm in the evening. Chance of precipitation is 30 percent.
Monday
A 20 percent chance of showers and thunderstorms after 2 p.m. Mostly sunny, with a high near 91. Calm wind becoming southwest around 5 mph in the afternoon.
Monday Night
A 10 percent chance of showers and thunderstorms before 8 p.m. Partly cloudy, with a low around 74.
Tuesday
A 20 percent chance of showers and thunderstorms after 2 p.m. Mostly sunny, with a high near 92.
Tuesday Night
A 10 percent chance of showers and thunderstorms before 8 p.m. Partly cloudy, with a low around 75.
Wednesday
A 40 percent chance of showers and thunderstorms, mainly after 2 p.m. Mostly sunny, with a high near 92.
Wednesday Night
A 30 percent chance of showers and thunderstorms, mainly before 8 p.m. Partly cloudy, with a low around 71.
Thursday
A 20 percent chance of showers. Sunny, with a high near 89.
Thursday Night
A 10 percent chance of showers. Partly cloudy, with a low around 71.
Friday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 89.
What was the climate like in the latest reporting period?
The NWS climate summary for metro Atlanta has now been updated with June 2026 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.
| Date | High Temp | Low Temp | Average | Departure from Norm | Precipitation |
| 2026-06-01 | 85 | 65 | 75 | -0.1 | T |
| 2026-06-02 | 84 | 63 | 73.5 | -1.9 | 0.01 |
| 2026-06-03 | 79 | 58 | 68.5 | -7.1 | 0 |
| 2026-06-04 | 82 | 61 | 71.5 | -4.3 | 0 |
| 2026-06-05 | 86 | 63 | 74.5 | -1.5 | 0 |
| 2026-06-06 | 86 | 66 | 76 | -0.2 | 0 |
| 2026-06-07 | 84 | 71 | 77.5 | 1.1 | 0.07 |
| 2026-06-08 | 82 | 70 | 76 | -0.6 | 0.5 |
| 2026-06-09 | 84 | 73 | 78.5 | 1.7 | 0.14 |
| 2026-06-10 | 89 | 72 | 80.5 | 3.5 | 0 |
| 2026-06-11 | 93 | 75 | 84 | 6.8 | 0 |
| 2026-06-12 | 92 | 76 | 84 | 6.6 | 0 |
| 2026-06-13 | 93 | 75 | 84 | 6.4 | 0 |
| 2026-06-14 | 90 | 73 | 81.5 | 3.8 | 0.57 |
| 2026-06-15 | 81 | 71 | 76 | -1.9 | 0 |
| 2026-06-16 | 73 | 67 | 70 | -8.1 | 0.62 |
| 2026-06-17 | 86 | 71 | 78.5 | 0.2 | 0.01 |
| 2026-06-18 | 88 | 72 | 80 | 1.6 | 1.92 |
| 2026-06-19 | 89 | 72 | 80.5 | 1.9 | T |
| 2026-06-20 | 86 | 73 | 79.5 | 0.8 | 0 |
| 2026-06-21 | 87 | 70 | 78.5 | -0.4 | 0 |
| 2026-06-22 | 91 | 73 | 82 | 3 | 0.72 |
| 2026-06-23 | 84 | 69 | 76.5 | -2.7 | 0.05 |
| 2026-06-24 | 86 | 65 | 75.5 | -3.8 | 0 |
| 2026-06-25 | 84 | 71 | 77.5 | -1.9 | 0 |
| 2026-06-26 | 91 | 71 | 81 | 1.4 | 0 |
| 2026-06-27 | 93 | 76 | 84.5 | 4.8 | T |
| 2026-06-28 | 94 | 75 | 84.5 | 4.7 | 0 |
| 2026-06-29 | 95 | 75 | 85 | 5.1 | 0 |
| 2026-06-30 | 96 | 78 | 87 | 7 | 0 |
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.”