Race-day weather · Wyndo for runners
Houston Marathon weather
January 17, 2027 · Houston, TX · scheduled start 6:55 AM (America/Chicago). What the start usually feels like, year by year — and a live start-time read once the race is inside the 7-day forecast window.
Countdown
179 days to race day
The live race-day forecast unlocks 173 days from now, when January 17, 2027 enters the 7-day forecast window — a start-time read for the scheduled 6:55 AM start. Until then, live hourly data is not available; the history below shows what race morning usually looks like.
Race-morning weather history
January Gulf Coast lottery: 2025 started at 32F; historical range from 20s (1978) to 70s with humidity (1986). Wyndo tracks what this calendar slot has actually served up at the start hour — temperature, dew point, wind, and rain — including the years when weather canceled or disrupted the race, and reads the live forecast for the start once race week arrives.
The Houston Marathon moves around the calendar year to year (Sunday in mid-January (2nd or 3rd Sunday; 2027 falls on MLK weekend)), so there's no fixed slot for year-by-year history. A table based on estimated dates could put the race in the wrong weather, so we don't show one. We're sourcing the real past edition dates by hand; the history lands here when they do.
Your heat-adjusted goal for the marathon
The same cited model as the full calculator, pointed at this race: once this race's history is assembled, the typical start-hour conditions plug in here automatically.
Racing this one?
Skip the taper-week refresh spiral. Turn on race-day emails for the Houston Marathon: the first outlook when it enters the 7-day forecast window, updates only when it changes meaningfully, and a final look the day before.
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The first race-day outlook when your race enters the 7-day forecast window, an update when it changes meaningfully, and a final look the day before.
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Race facts
- Start line
- Congress Ave at Fannin St, downtown
- Scheduled start
- 6:55 AM (America/Chicago) — Official 2027 schedule: wheelchair/handcycle 06:35, Aramco Half elite 06:45, marathon elite 06:55 followed immediately by both open fields. Half shares the start line and day; 5K is Saturday Jan 16.
- Field size
- 2026 marathon finishers 9,257 (half adds ~14k more; ~25,000 weekend runners)
- Registration
- open (tiered pricing until sellout)
Wyndo is not affiliated with or endorsed by the Houston Marathon (officially the "Chevron Houston 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.