The National Weather Service forecasts mostly cloudy skies here in Cobb County on Tuesday, May 20, 2025, with a high near 90 degrees.
The National Weather Service has issued a hazardous weather outlook for Cobb County and other parts of the region due to a cold front that will bring a line of thunderstorms to north and central Georgia after 7 p.m today and through the overnight period. Several of these storms could be severe, with the greatest likelihood in northwest Georgia. Severe thunderstorms that occur will be capable of producing damaging wind gusts and a few brief tornadoes. Hail will also be possible.
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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
Mostly cloudy, then gradually becoming sunny, with a high near 90. Southwest wind 5 to 10 mph increasing to 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph.
Tonight
Showers and thunderstorms, mainly before 2 a.m. Low around 67. Southwest wind 5 to 10 mph, with gusts as high as 15 mph. Chance of precipitation is 80 percent. New rainfall amounts between a quarter and half of an inch possible.
Wednesday
Sunny, with a high near 83. West wind 10 to 15 mph, with gusts as high as 25 mph.
Wednesday Night
Mostly clear, with a low around 61. West wind 5 to 10 mph, with gusts as high as 20 mph.
Thursday
Sunny, with a high near 81. West wind 10 to 15 mph, with gusts as high as 25 mph.
Thursday Night
Mostly clear, with a low around 54.
Friday
Sunny, with a high near 76.
Friday Night
Mostly clear, with a low around 54.
Saturday
Mostly sunny, with a high near 77.
Saturday Night
Partly cloudy, with a low around 59.
Sunday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 80.
Sunday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 63.
Memorial Day
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 81.
What was the climate like in the latest reporting period?
The NWS climate summary for metro Atlanta has now been updated with April 2025 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 | Low | Average | Departure from Norm | Precipitation |
| 2025-04-01 | 78 | 46 | 62 | 2.5 | 0 |
| 2025-04-02 | 84 | 64 | 74 | 14.3 | 0 |
| 2025-04-03 | 84 | 67 | 75.5 | 15.6 | 0 |
| 2025-04-04 | 87 | 66 | 76.5 | 16.3 | T |
| 2025-04-05 | 87 | 67 | 77 | 16.6 | 0 |
| 2025-04-06 | 74 | 62 | 68 | 7.3 | 1.9 |
| 2025-04-07 | 68 | 48 | 58 | -2.9 | 1 |
| 2025-04-08 | 65 | 44 | 54.5 | -6.7 | 0 |
| 2025-04-09 | 68 | 42 | 55 | -6.4 | 0 |
| 2025-04-10 | 77 | 49 | 63 | 1.3 | 0.31 |
| 2025-04-11 | 68 | 50 | 59 | -2.9 | 0.01 |
| 2025-04-12 | 66 | 43 | 54.5 | -7.7 | 0 |
| 2025-04-13 | 73 | 42 | 57.5 | -5 | 0 |
| 2025-04-14 | 84 | 56 | 70 | 7.3 | 0 |
| 2025-04-15 | 73 | 53 | 63 | 0 | 0 |
| 2025-04-16 | 73 | 47 | 60 | -3.2 | 0 |
| 2025-04-17 | 78 | 51 | 64.5 | 1 | 0 |
| 2025-04-18 | 84 | 54 | 69 | 5.2 | 0 |
| 2025-04-19 | 86 | 60 | 73 | 9 | 0 |
| 2025-04-20 | 83 | 65 | 74 | 9.7 | 0 |
| 2025-04-21 | 83 | 62 | 72.5 | 7.9 | 0 |
| 2025-04-22 | 75 | 66 | 70.5 | 5.7 | 0.01 |
| 2025-04-23 | 81 | 64 | 72.5 | 7.4 | 0.03 |
| 2025-04-24 | 79 | 63 | 71 | 5.6 | 0.07 |
| 2025-04-25 | 83 | 65 | 74 | 8.4 | 0.75 |
| 2025-04-26 | 81 | 63 | 72 | 6.1 | 0 |
| 2025-04-27 | 83 | 62 | 72.5 | 6.3 | 0 |
| 2025-04-28 | 79 | 63 | 71 | 4.6 | 0 |
| 2025-04-29 | 82 | 63 | 72.5 | 5.8 | 0 |
| 2025-04-30 | 85 | 65 | 75 | 8 | 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.”
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