Race-day weather · Wyndo for runners
Rock 'n' Roll Las Vegas Half Marathon weather
February 21, 2027 · Las Vegas, NV · traditional start around 4:30 PM (America/Los_Angeles) — 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
177 days to race day
The live race-day forecast unlocks 171 days from now, when February 21, 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.
Race-morning weather history
Mid-Feb Las Vegas at a 4:30 PM start dropping into evening: cool high-desert, roughly 50s °F at the gun falling toward the 40s after dark, low humidity — UNVERIFIED climatology, no station data pulled. Evening timing makes this the odd one out vs the dawn runDisney/DC starts. Occurrence gaps (possible skipped years) matter more than weather cancellations here — flag unconfirmed years. 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.
Scroll sideways to see all columns.
| Year | Start temp | Dew point | Wind | Precip (start hr) | Day's high |
|---|---|---|---|---|---|
| 2026 | 63°F | 22°F | 3 mph | dry | 63°F |
| 2024 | 68°F | 37°F | 4 mph | dry | 69°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: once this race's history is assembled, the typical start-hour conditions plug in here automatically.
Your race-day brief
Skip the taper-week refresh spiral. Email briefs for the Rock 'n' Roll Las Vegas Half Marathon: a race-morning outlook when race day enters the 7-day forecast window, updates only when it changes meaningfully, and a final look the day before.
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Race facts
- Start line
- Las Vegas Blvd S ("The Strip") at New York-New York Hotel & Casino (3790 Las Vegas Blvd S). Coordinate = Nominatim geocode of New York-New York (36.1021,-115.1745); start line is on the Blvd at that frontage, finish is on the Blvd at The Bellagio. Approximate to the casino frontage, not the surveyed timing mat. Source: runrocknroll.com course-overview ("Las Vegas Blvd. at New York-New York").
- Traditional start (not confirmed for 2027)
- 4:30 PM (America/Los_Angeles) — RARE EVENING START: Half gun 4:30 PM PT (run after sunset down the closed Strip). 10K and 5K run the same night at their own times. Source: runrocknroll.com/events/las-vegas/course-overview (2026 edition: "begins at 4:30 PM on February 22, 2026", live 2026-08-27). Wheelchair/wave offsets not separately verified. Carried to 2027.
- Field size
- No defensible half-only finisher count located; scout figure was an ESTIMATE and is NOT carried. Best available: "more than 27,000 registered participants" for the 2024 LV event ACROSS ALL DISTANCES (half + 10K + 5K; 5K alone ~6,000), per Running USA / endurance.biz (endurance.biz/2024/…27000-registered…las-vegas; runningusa.org). All-distance REGISTRANTS, not half FINISHERS — do NOT present as the half field. Re-verify before publishing any number.
- Registration
- open (online registration; St. Jude charity entries)
Wyndo is not affiliated with or endorsed by the Rock 'n' Roll Las Vegas Half Marathon (officially the "St. Jude Rock 'n' Roll Running Series Las Vegas") 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.