Marietta Climate by Month
Marietta, Georgia, United States
Hot summers and cool winters, with rain spread through the year.
Hot summers and cool winters, with rain spread through the year: that's Marietta's climate in short. Afternoon highs range from 52°F (11°C) in January to 89°F (32°C) in July, and January nights average 33°F (1°C). It gets 53 in (1348 mm) of rain a year, spread across the months.
- Warmest month
- 89°F(32°C)
- Average high, July
- Coldest nights
- 33°F(1°C)
- Average low, January
- Rain per year
- 53 in(1348 mm)
- No clear rainy season
- Humidity
- 67%
- Sunniest: July
Best and worst months in Marietta
Best for weatherThe most comfortable weather comes in October, with highs around 73°F (23°C) and about 3.2 in (81 mm) of rain a month.
Least pleasantDecember and January are the least pleasant; January is the coldest, with highs of only 52°F (11°C).
Comfort combines how close the afternoon high is to 75°F (24°C) with how much rain falls and how humid it is. See where the weather is best in October.
Temperature and rain through the year
Highs and lows (°F)
Average highAverage low
Rain (in per month)
Marietta weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 52°F(11°C) | 33°F(1°C) | 4.8 in(122 mm) | 65% | 2.5 |
| FebFebruary | 57°F(14°C) | 36°F(2°C) | 5.1 in(130 mm) | 65% | 3.0 |
| MarMarch | 65°F(18°C) | 43°F(6°C) | 5.6 in(143 mm) | 64% | 4.2 |
| AprApril | 73°F(23°C) | 50°F(10°C) | 4.8 in(121 mm) | 59% | 5.2 |
| MayMay | 80°F(27°C) | 59°F(15°C) | 3.8 in(96 mm) | 65% | 6.0 |
| JunJune | 86°F(30°C) | 66°F(19°C) | 4.3 in(110 mm) | 72% | 5.9 |
| JulJuly | 89°F(32°C) | 69°F(21°C) | 4.8 in(122 mm) | 71% | 6.1 |
| AugAugust | 87°F(31°C) | 69°F(20°C) | 3.9 in(100 mm) | 70% | 5.5 |
| SepSeptember | 82°F(28°C) | 63°F(17°C) | 3.8 in(97 mm) | 69% | 4.6 |
| OctOctoberBest | 73°F(23°C) | 52°F(11°C) | 3.2 in(81 mm) | 67% | 3.6 |
| NovNovember | 63°F(17°C) | 41°F(5°C) | 3.5 in(90 mm) | 68% | 2.7 |
| DecDecember | 54°F(12°C) | 35°F(2°C) | 5.4 in(136 mm) | 70% | 2.2 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
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