Race-day weather · Wyndo for runners
St. George Marathon weather
October 3, 2026 · Central, UT · scheduled start 7:00 AM (America/Denver). 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.
This edition has run
The 2026 St. George Marathon is behind us
The next edition typically follows the race's pattern — 1st Saturday of October. We'll flip this page to the new date (and the live start-time read for race week) when the race confirms its schedule. The history below keeps the long view.
Race-morning weather history
Cold pre-dawn canyon start (~40F at 5,240 ft) but desert finish can exceed 80F in hot years; net -2,560 ft descent with tailwind PR years. 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.
Median start temp
49°F
p75 (a warm year): 56°F
Median dew point
33°F
at the start hour
Rain at the start
10%
2 of 20 measured years
Warmest start
64°F
in 2011
Scroll sideways to see all columns.
| Year | Start temp | Dew point | Wind | Precip (start hr) | Day's high |
|---|---|---|---|---|---|
| 2025 | 50°F | 37°F | 6 mph | dry | 65°F |
| 2024 | 58°F | 28°F | 6 mph | dry | 88°F |
| 2023 | 47°F | 40°F | 5 mph | dry | 81°F |
| 2022 | 52°F | 37°F | 6 mph | dry | 79°F |
| 2021 | 46°F | 31°F | 5 mph | dry | 78°F |
| 2020 | 59°F | 13°F | 7 mph | dry | 85°F |
| 2019 | 40°F | 18°F | 8 mph | dry | 76°F |
| 2018 | 48°F | 42°F | 3 mph | 0.3 mm | 56°F |
| 2017 | 44°F | 23°F | 4 mph | dry | 79°F |
| 2016 | 57°F | 50°F | 6 mph | dry | 77°F |
| 2015 | 52°F | 40°F | 5 mph | dry | 70°F |
| 2014 | 45°F | 29°F | 6 mph | dry | 75°F |
| 2013 | 32°F | 19°F | 8 mph | dry | 62°F |
| 2012 | 53°F | 17°F | 8 mph | dry | 73°F |
| 2011 | 64°F | 46°F | 4 mph | dry | 81°F |
| 2010 | 59°F | 35°F | 3 mph | dry | 86°F |
| 2009 | 44°F | 2°F | 7 mph | dry | 68°F |
| 2008 | 56°F | 46°F | 8 mph | 0.4 mm | 66°F |
| 2007 | 42°F | 28°F | 2 mph | dry | 54°F |
| 2006 | 44°F | 40°F | 1 mph | dry | 65°F |
Slot climatology: each row is the weather at this race's usual calendar slot and start hour (ERA5 reanalysis at the start line) — including years when the edition was canceled or moved. A computed slot date is not a claim the race ran that day.
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
- SR-18 at Central, UT (Pine Valley Mountains, elev 5,240 ft, ~26 mi north of finish)
- Scheduled start
- 7:00 AM (America/Denver) — Point-to-point: buses load 3:45-5:15 AM at Vernon Worthen Park in St. George; runners wait in the dark ~40F at the 5,240 ft start near Central on SR-18. 5K is Friday evening.
- Field size
- 2025 marathon finishers ~5,200; 2026 (50th running) capped at 6,000 marathon entries
- Registration
- open (first-come since dropping its longtime lottery; capped ~6,000 marathon)
Wyndo is not affiliated with or endorsed by the St. George Marathon (officially the "St. George 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.