Race-day weather · Wyndo for runners
Atlanta Half Marathon weather
March 7, 2027 · Atlanta, GA · traditional start around 7:15 AM (America/New_York) — not yet confirmed for 2027. What the start usually feels like, year by year — and a live start-time read once the race confirms its schedule and race week arrives.
Countdown
191 days to race day
The live race-day forecast unlocks 185 days from now, when March 7, 2027 enters the 7-day forecast window. Until then, live hourly data is not available; the history below shows what race morning usually looks like.
The 2027 schedule hasn't been published yet — both the date and start time shown here are carried from earlier editions and aggregators. We'll switch on the live start-time read when the race posts its schedule.
Typical start temp
44°F
median of 5 years
A warm year
45°F
75th percentile start temp
Rain at the start
0%
0 of 5 measured years
Race-morning weather history
Late-Feb/early-March Atlanta: cool mornings (~38–58F), variable late-winter conditions — typical-climate characterization, UNVERIFIED; ERA5 supplies actuals. IMPORTANT: the 2021 edition was relocated ~40km south to Atlanta Motor Speedway (Hampton, GA) due to COVID — its weather slot is a DIFFERENT location and is omitted from the downtown historicalRaceDates. Start/finish venue also moved downtown over time (Centennial Olympic Park → The Home Depot Backyard). Wyndo tracks what past editions of the race actually served up at the start hour — temperature, dew point, wind, and rain, and reads the live forecast for the start once the race confirms its schedule and race week arrives.
Median start temp
44°F
p75 (a warm year): 45°F
Median dew point
36°F
at the start hour
Rain at the start
0%
0 of 5 measured years
Warmest start
50°F
in 2022
Scroll sideways to see all columns.
| Year | Start temp | Dew point | Wind | Precip (start hr) | Day's high |
|---|---|---|---|---|---|
| 2026 | 45°F | 42°F | 5 mph | dry | 76°F |
| 2025 | 35°F | 20°F | 6 mph | dry | 54°F |
| 2024 | 30°F | 25°F | 4 mph | dry | 63°F |
| 2023 | 44°F | 36°F | 6 mph | dry | 71°F |
| 2022 | 50°F | 45°F | 5 mph | dry | 53°F |
Each row is the weather at a real past edition's date and this race's current start hour (ERA5 reanalysis at the start line).
Your heat-adjusted goal for the half marathon
The same cited model as the full calculator, pointed at this race: the median start-hour conditions this calendar slot has served up — climatology, not a forecast.
Your race-day brief
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Race facts
- Start line
- The Home Depot Backyard, 1 Backyard Way, at Mercedes-Benz Stadium, downtown Atlanta (2026 start & finish); geocode of the address. NOTE: venue MOVED — 2024 started/finished at Centennial Olympic Park (~0.6mi NE); older editions used the Marietta St / Centennial Olympic Park area.
- Traditional start (not confirmed for 2027)
- 7:15 AM (America/New_York) — Half Marathon and full Marathon both start 7:15am (2026 ATC). (A 7:00am figure in press is the broadcast start, not the gun.) 5K is the prior Saturday, 7:45am.
- Field size
- Page uses ~3,150 HALF-MARATHON STARTERS (2024, ATC) [V]. Brief's "~6k half finishers 2024" is NOT confirmed — likely a weekend total (half + marathon + 5K) or a different scope; flag. USATF Half Marathon Championships have been contested within this half (2025, 2026).
- Registration
- open (Atlanta Track Club; sold out in 2026)
Wyndo is not affiliated with or endorsed by the Atlanta Half Marathon (officially the "Publix Atlanta Marathon Weekend — Half Marathon") or its organizers. Race names are used descriptively to identify the event; schedules and start times belong to the race — always confirm details on the official site. Weather guidance here is informational, never medical advice, and event alert flags on race day belong to the race's own medical team.