Race-day weather · Wyndo for runners
Miami Marathon weather
January 31, 2027 · Miami, FL · traditional start around 6:00 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
158 days to race day
The live race-day forecast unlocks 152 days from now, when January 31, 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 start time hasn't been published yet — the 6:00 AM start shown here is carried from a previous edition. We'll switch on the live start-time read when the race posts its schedule.
Typical start temp
72°F
median of 10 years
A warm year
73°F
75th percentile start temp
Rain at the start
20%
2 of 10 measured years
Race-morning weather history
Warm and humid even pre-dawn (typical start ~66F at 80% humidity, highs ~75-77F) — heat is the standing risk for marathoners finishing mid-morning, with occasional strong-wind years on the MacArthur Causeway. 2021 cancelled (COVID). 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
72°F
p75 (a warm year): 73°F
Median dew point
66°F
at the start hour
Rain at the start
20%
2 of 10 measured years
Warmest start
74°F
in 2026
Scroll sideways to see all columns.
| Year | Start temp | Dew point | Wind | Precip (start hr) | Day's high |
|---|---|---|---|---|---|
| 2026 | 74°F | 70°F | 11 mph | dry | 79°F |
| 2025 | 72°F | 70°F | 4 mph | dry | 78°F |
| 2024 | 73°F | 71°F | 9 mph | dry | 82°F |
| 2023 | 74°F | 66°F | 14 mph | dry | 78°F |
| 2022 | 70°F | 64°F | 1 mph | dry | 78°F |
| 2020 | 72°F | 63°F | 14 mph | dry | 76°F |
| 2019 | 71°F | 67°F | 13 mph | 1.9 mm | 74°F |
| 2018 | 73°F | 67°F | 17 mph | dry | 78°F |
| 2017 | 60°F | 46°F | 14 mph | 0.3 mm | 67°F |
| 2016 | 49°F | 42°F | 17 mph | dry | 60°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 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.
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Race facts
- Start line
- Biscayne Boulevard at the Kaseya Center (601 Biscayne Blvd; arena formerly AmericanAirlines/FTX/Miami-Dade Arena in older sources). Coordinates geocoded — approximate.
- Traditional start (not confirmed for 2027)
- 6:00 AM (America/New_York) — Carried from the 2026 edition's official weekend schedule: marathon+half single 6:00 AM ET gun behind corrals A-L (Athletes With Disabilities 5:55). An NBC 6 report on the 2027 sell-out also cites 6 a.m. The official schedule page hadn't rolled to 2027 as of 2026-08-26. The half is ~10x the marathon — event-level counts are half-dominated.
- Field size
- 2026 MARATHON-only finishers per FindMyMarathon (aggregator); the concurrent half is several times larger.
- Registration
- sold out — 2027 general entries gone ~6 months out (NBC 6, read 2026-08-26)
Wyndo is not affiliated with or endorsed by the Miami Marathon (officially the "Life Time Miami Marathon and Half") 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.