Marietta, Georgia Weather

Over the next 7 days in Marietta, daytime highs range from 13°C to 20°C and night-time lows from 0°C to 10°C. The warmest afternoon is likely on Friday at 20°C, while the coolest night is expected tonight at 0°C. Temperatures trend warmer through the week, rising by about 6°C. Expect a wide gap of around 13°C between afternoon and early-morning temperatures, so mornings will feel noticeably cooler.

No significant rain is expected in Marietta this week. Dry weather should hold every day, so outdoor plans are unlikely to be disrupted by rain.

Winds stay mostly light this week, peaking at about 17 km/h tomorrow. UV levels stay moderate or lower, peaking at 4. Average humidity is a comfortable 42% or so.

At 02:00 local time it is 2°C in Marietta under clear skies, feeling like -1°C. Today's forecast high is 13°C and the low is 0°C, and the day overall looks overcast. Rain is unlikely today (0% chance). Winds are blowing at about 8 km/h from the north. Humidity is 73%.

Based on 25 years of satellite and reanalysis data (2001-2025), July is usually the hottest month in Marietta, with average daytime highs around 32°C. January is the coolest, when nights typically fall to about -1°C and frost is possible on the coldest nights. That is a wide yearly range of roughly 33°C, so the seasons feel very different from each other.

The area receives about 1290 mm of rain in a typical year. Most of it falls from December to August (around 78% of the yearly total), and December is the wettest month at roughly 133 mm.

For outdoor plans and travel, September to October usually offer the most comfortable weather in Marietta, with mild days and relatively little rain.

Source: NASA POWER (MERRA-2 reanalysis), averaged over the roughly 50 km grid area around Marietta. Values describe typical conditions, not a forecast.

Marietta is one of many towns in Georgia's humid subtropical climate, from the coastal plain to the Appalachian foothills, about 27 km north-west of Atlanta. Before the rains arrive, there's hot, humid summers (June–August) with highs often above 33°C. Cooler months mean mild winters (December–February). This page shows live, auto-refreshing weather for Marietta: current conditions, an hourly breakdown, a 16-day outlook, a date-lookup tool for any past or future date, and real-time air quality, sourced from Open-Meteo. Local timezone: America/New_York.

Marietta's day-to-day weather follows the broader pattern of Georgia described above. See the hourly weather forecast or the air quality index for more detail.