Weather in Atlanta in Celsius: Local Guide to Temperatures, Seasons, and What to Expect

If you’re in Atlanta, Georgia and you prefer thinking in Celsius instead of Fahrenheit, it helps to understand how local temperatures typically translate — and what that actually feels like when you step outside in the city.

This guide explains Atlanta weather in Celsius, season by season, with practical context for residents, visitors, and anyone planning time in the city.

Quick Answer: Typical Atlanta Temperatures in Celsius

Here’s a simple overview of average daytime high temperatures in Atlanta (°C):

Most of the year, Atlanta’s weather falls somewhere between 10 °C and 32 °C, with humidity often making summer days feel several degrees warmer than the thermometer reading.

Understanding Fahrenheit vs Celsius in Atlanta

Because the United States uses Fahrenheit, almost all local weather information in Atlanta — from TV forecasts to the signs you’ll see on I-75/I-85 — is displayed in °F. If you’re more comfortable with °C, it helps to know a few quick conversions:

• Hot summer afternoon:
  90 °F ≈ 32 °C
• Warm day:
  82 °F ≈ 28 °C
• Mild, pleasant afternoon:
  72 °F ≈ 22 °C
• Cool day:
  59 °F ≈ 15 °C
• Near freezing:
  32 °F = 0 °C

A simple shortcut:

• (°F − 32) ÷ 2 ≈ °C (this isn’t exact, but close enough for daily use in Atlanta)

Most weather apps used in Atlanta, including common smartphone apps, allow you to switch units from Fahrenheit to Celsius in the settings. That’s often the easiest solution if you’re staying in the city for a while.

Atlanta’s Climate in Celsius: Season by Season

Winter in Atlanta (December–February)

Atlanta winters are generally cool rather than bitterly cold, especially compared with cities farther north in the U.S.

• Typical daytime highs:8–13 °C
• Typical overnight lows:0–5 °C
• Coldest mornings: Sometimes drop below 0 °C (especially in January)

You might see:

• Light frost on cars and roofs around neighborhoods like Buckhead, Decatur, or East Atlanta Village.
• Occasional cold snaps where temperatures can fall to −5 °C or below, especially overnight.

Snow in Atlanta is rare and usually light. When it does happen, even a couple of centimeters can affect roads across the metro area, including around Hartsfield-Jackson Atlanta International Airport and major interstates.

🧣 Practical tip: If you’re visiting Atlanta in winter, bring layers that work from about 0 °C to 12 °C — a medium-weight jacket, a sweater, and something wind-resistant for breezy days.

Spring in Atlanta (March–May)

Spring in Atlanta feels comfortable and increasingly warm, with a noticeable shift from cool March days to summer-like late May.

• Early spring highs: around 15–20 °C
• Late spring highs: around 23–28 °C
• Spring lows: roughly 7–16 °C

By April and May, many days feel mild and pleasant in the 18–24 °C range, ideal for walking along the Atlanta BeltLine, visiting Piedmont Park, or exploring Midtown and Inman Park.

The major spring feature in Atlanta is pollen, especially from trees:

• Even when it’s a nice 20 °C outside, people often notice a yellowish film of pollen on cars and sidewalks.
• Allergies are common during this time, particularly in March and April.

🌷 Practical tip: Plan for a temperature range of 10–25 °C in spring, and expect quick changes between cooler and warmer days.

Summer in Atlanta (June–August)

Summer in Atlanta is hot and humid. The humidity makes Celsius temperatures feel hotter than the number suggests.

• Typical daytime highs:29–34 °C
• Common “feels like” temperatures:35–40 °C on humid afternoons
• Nighttime lows: often 20–24 °C and still muggy

Warm, sticky air is common from downtown to neighborhoods like West Midtown, Old Fourth Ward, and around major attractions such as the Georgia Aquarium or Mercedes-Benz Stadium.

You can expect:

• Afternoon heat peaks around 2–5 p.m., often above 30 °C
• Pop-up thunderstorms, especially late afternoon or evening, which can briefly cool the air but keep it humid

🌡️ Heat awareness tip:
On days when forecasts show 32 °C or higher, it can feel several degrees warmer due to Atlanta’s humidity and urban heat, especially on concrete-heavy streets or MARTA platforms.

For residents and visitors:

• Air conditioning is widely used across Atlanta homes, offices, hotels, and shopping areas.
• Outdoor activities — walking in the Atlanta Botanical Garden, festivals in Central Park (Old Fourth Ward), or visiting the Zoo — are more comfortable in the morning or late evening when temperatures dip closer to 24–27 °C.

Fall (Autumn) in Atlanta (September–November)

Fall in Atlanta often starts warm and gradually shifts to cooler, crisp days.

• Early fall highs (September):26–30 °C
• Mid to late fall highs (October–November):18–24 °C
• Lows: about 9–16 °C as the season progresses

By October, many days sit in the 18–23 °C range — often considered some of the most pleasant weather of the year for outdoor events, hikes at nearby Stone Mountain, or walking around Grant Park or Virginia-Highland.

🍁 Practical tip: Bring layers that work from about 10 °C in the morning up to 24 °C in the afternoon. Evenings can cool quickly, especially later in the season.

What Do Common Celsius Temperatures Feel Like in Atlanta?

Local humidity, sunshine, and wind can change how a temperature feels. Here’s how common Celsius readings typically feel in Atlanta’s climate:

• 0–5 °C: Cold for Atlanta; gloves and a warm jacket help, especially in the morning or at night.
• 10–15 °C: Cool but comfortable with a light jacket or sweater. Typical for some winter days and early spring.
• 16–22 °C: Mild and pleasant — ideal for walking the BeltLine or sitting outside at a café in Midtown.
• 23–27 °C: Warm, especially in the sun. Comfortable for short sleeves; common in late spring and early fall.
• 28–32 °C: Hot, especially with humidity. Expect to sweat if you spend time outdoors in summer.
• 33–35+ °C: Very hot and muggy on typical Atlanta summer afternoons; shade and hydration become more important.

Rain, Storms, and Humidity — in Celsius Context

Rain and thunderstorms

Atlanta experiences frequent rain and thunderstorms, particularly in spring and summer:

• Many summer storms develop on days where the high is around 30–33 °C.
• Temperatures often drop a few degrees after a storm, but thick humidity can remain.

For daily plans — whether you’re going to a Braves game at Truist Park or attending an event downtown — it helps to check the forecast in the morning to see if afternoon storms are likely.

Humidity

Humidity is the main reason 30 °C in Atlanta can feel very different from 30 °C in a drier climate:

• On humid days, the air can feel heavy, skin stays damp, and shade is noticeably cooler than direct sun.
• Even mornings around 22–24 °C can feel warm and sticky during peak summer.

Many Atlantians structure their outdoor activities, jogging routes, or dog walks near the Chattahoochee River or city parks for early or late in the day when Celsius readings are a bit lower.

Using Celsius in Atlanta: Practical Tips

1. Switch your weather apps to Celsius

Most people in Atlanta rely on smartphone apps or built-in weather widgets. Nearly all of them let you switch units:

• Look for “Units” or “Temperature Units” in settings
• Select Celsius (°C)

This will give you real-time Atlanta forecasts and hourly breakdowns in the scale you’re used to.

2. Know the key Atlanta “Celsius thresholds”

For everyday planning in the city, these temperature markers are useful:

• Around 10 °C: Light jacket; typical cool morning in fall or spring.
• Around 20 °C: Very comfortable for most outdoor plans in Atlanta.
• Around 30 °C: Normal summer heat; expect humidity.
• Above 33 °C: Strong summer heat; many people limit mid-afternoon outdoor activities.

3. Where to find reliable local forecasts

While the readings will appear in Fahrenheit by default, they can be converted or set to Celsius:

• National Weather Service (NWS) – Atlanta Forecast Office
  • General service area: Metro Atlanta and north Georgia
  • Maintains official forecasts and weather alerts for the Atlanta region.

Local TV stations, radio, and digital boards around the city also display temperatures, though almost always in °F. If you’re reading 86 °F on a billboard along the Downtown Connector (I-75/85), that’s about 30 °C.

Planning Your Atlanta Activities By Celsius

Here’s how typical temperature ranges translate into planning your day in the city:

• 10–18 °C:
  Great for outdoor walking tours downtown, visiting the Atlanta History Center, or exploring neighborhoods like Little Five Points or Cabbagetown with a light layer.

• 19–25 °C:
  Ideal for walks on the BeltLine, attending outdoor festivals, picnicking at Piedmont Park, or going to open-air markets around the city.

• 26–30 °C:
  Good for outdoor plans if you pace yourself — think shorter walks, more shade, and breaks in air-conditioned places like Ponce City Market.

• 31–35 °C:
  Best for shorter outdoor periods; common in summer. Many Atlanta residents spend midday in indoor spaces (museums, shops, restaurants) and save parks, trails, or Zoo Atlanta for early morning or evening when temperatures trend back toward 26–28 °C.

Understanding Atlanta weather in Celsius makes it much easier to plan what to wear, when to head outside, and how the city’s climate will actually feel day to day. Most of the year, you’ll see temperatures ranging from cool 10 °C mornings to hot 32 °C summer afternoons, with humidity shaping how each of those numbers feels as you move through Atlanta.