McDonough (GA) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit McDonough.
Climate overview of McDonough
McDonough, Georgia, United States of America, sees big temperature differences between seasons, with July peaking at 33°C (91°F) and January dropping to 12°C (54°F).
Rain/snowfall is high, totalling around 1214 mm (48 in) per year. December is the wettest month and May the driest. The city also experiences very warm summers and mild winters. The most sunshine falls in May, with an average of 9.6 hours of daily sunshine.
McDonough Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in McDonough - and find the best time to visit.
Monthly Temperature in McDonough
Visitors to McDonough can expect significant temperature changes throughout the year. Average maximum daytime temperatures range from a very warm 33°C (91°F) in July, the warmest time of the year, to a moderate 12°C (54°F) during cooler months like January.
At night, you can expect temperatures ranging from 21°C (70°F) in July to around 0°C (32°F) during January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in McDonough
McDonough is known for its substantial rain/snowfall, with annual precipitation reaching 1214 mm (48 in). While rainfall varies throughout the year, each season offers its own charm. December brings wetter days averaging 157 mm (6.2 in) of precipitation, spread over 11 rainy days.
In contrast, the driest month May experiences a drier climate, with about 73 mm (2.9 in) of rainfall spread across 9 rainy days. For more details, please visit our McDonough Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in McDonough
Seasonal changes in sunshine hours are quite dramatic in McDonough. While May receives considerable daily sunshine with up to 9.6 hours, January marks the darkest time of the year, where sunshine is scarce with only 5.5 hours of sunlight per day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Humidity in McDonough by Month
The relative humidity is high throughout the year in McDonough.
The city experiences its highest humidity in August, reaching 75%. In April, the humidity drops to its lowest level at 61%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Best Time to Visit McDonough
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: May, September and October
- Warmest weather: June, July and August
- Most sunshine: May and June
- Fewer rainy days: April, May, September, October and November
- Seasonal pattern: Very warm summers and mild winters
- Coldest conditions: January, with freezing nights around 0°C (32°F).
Frequently asked questions about the climate in McDonough
What is the best time to visit McDonough?
May, September and October typically offer the most optimal weather in McDonough. In contrast, July tends to have less optimal conditions. McDonough has very warm summers and mild winters.
What temperatures can I expect in McDonough?
Daytime highs range from 12°C (54°F) in January to 33°C (91°F) in July. Nighttime lows range from 0°C (32°F) to 21°C (70°F). Temperatures vary considerably through the year.
How much rain does McDonough get?
Annual rainfall is around 1214 mm (48 in). December is the wettest month with 157 mm (6.2 in), while May is the driest with 73 mm (2.9 in).
How sunny is McDonough?
McDonough receives around 2,733 hours of sunshine per year. May is the sunniest month with 288 hours, while January is the cloudiest with just 164 hours. Overall, McDonough enjoys abundant sunshine.
McDonough 3-Day Forecast
McDonough on the map
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