Race-day weather · Wyndo for runners
Honolulu Marathon weather
December 13, 2026 · Honolulu, HI · scheduled start 5:00 AM (Pacific/Honolulu). 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
153 days to race day
The live race-day forecast unlocks 147 days from now, when December 13, 2026 enters the 7-day forecast window — a start-time read for the scheduled 5:00 AM start. Until then, no made-up long-range forecast — the history below is what race morning usually looks like.
Typical start temp
74°F
median of 20 years
A warm year
75°F
75th percentile start temp
Rain at the start
15%
3 of 20 measured years
Race-morning weather history
Heat and tropical humidity are the norm (low-70s F at the 5 AM start, warming fast); 2025 was the outlier — 6+ inches of rain and flash-flood warnings on race day. 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
74°F
p75 (a warm year): 75°F
Median dew point
67°F
at the start hour
Rain at the start
15%
3 of 20 measured years
Warmest start
76°F
in 2020
| Year | Start temp | Dew point | Wind | Precip (start hr) | Day's high |
|---|---|---|---|---|---|
| 2025 | 74°F | 71°F | 11 mph | 0.3 mm | 77°F |
| 2024 | 74°F | 69°F | 2 mph | dry | 78°F |
| 2023 | 76°F | 70°F | 14 mph | dry | 79°F |
| 2022 | 75°F | 67°F | 19 mph | dry | 77°F |
| 2021 | 74°F | 70°F | 19 mph | dry | 76°F |
| 2020 | 76°F | 67°F | 6 mph | dry | 78°F |
| 2019 | 76°F | 67°F | 2 mph | dry | 78°F |
| 2018 | 74°F | 63°F | 24 mph | dry | 76°F |
| 2017 | 73°F | 67°F | 16 mph | 0.2 mm | 74°F |
| 2016 | 74°F | 69°F | 3 mph | dry | 76°F |
| 2015 | 75°F | 69°F | 7 mph | dry | 77°F |
| 2014 | 74°F | 67°F | 24 mph | dry | 75°F |
| 2013 | 75°F | 67°F | 3 mph | dry | 77°F |
| 2012 | 75°F | 68°F | 19 mph | dry | 76°F |
| 2011 | 72°F | 66°F | 24 mph | dry | 74°F |
| 2010 | 72°F | 68°F | 13 mph | dry | 75°F |
| 2009 | 74°F | 63°F | 4 mph | dry | 77°F |
| 2008 | 71°F | 66°F | 3 mph | 0.6 mm | 74°F |
| 2007 | 75°F | 68°F | 10 mph | dry | 76°F |
| 2006 | 74°F | 63°F | 18 mph | dry | 76°F |
Slot climatology, honestly framed: 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, because what the slot serves up is exactly the question. 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.
Training for this race?
Wyndo can email you when conditions turn good for a run near Honolulu, HI — and stay quiet when they don't. (A race-week forecast alert keyed to race day is coming next.)
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Race facts
- Start line
- Ala Moana Blvd fronting Ala Moana Beach Park
- Scheduled start
- 5:00 AM (Pacific/Honolulu) — Single mass start at 5:00 AM under a fireworks display; no course time limit. Start to Park 10K same morning; Kalakaua Merrie Mile Saturday.
- Field size
- 2025 marathon finishers ~22,771 from a record 28,756 entrants (large Japanese contingent)
- Registration
- open (no field cap, no time limit)
Wyndo is not affiliated with or endorsed by the Honolulu Marathon (officially the "JAL Honolulu 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.