Weather
Climate Avg| Time | Temp | Dew Pt | Humidity | Wind | Conditions |
|---|---|---|---|---|---|
| Start | 73.3 – 73.3°F | 67° Steamy | 80 – 80% | 8 mph SW | Partly cloudy |
| 8:00 AM | 76 – 76°F | 67° Steamy | 73 – 73% | 9 mph S | Partly cloudy |
| 9:00 AM | 74.1 – 78.8°F | 67° Steamy | 64 – 80% | 15 mph E | Clear sky |
| 10:00 AM | 74.9 – 79°F | 67° Steamy | 67 – 76% | 15 mph NE | Drizzle |
| 11:00 AM | 75.6 – 79.3°F | 67° Steamy | 67 – 74% | 16 mph NE | Drizzle |
| Finish | 75.7 – 79.9°F | 67° Steamy | 65 – 73% | 15 mph NE | Drizzle |
Based on 3-year average for this date. Real forecast available in 134 days.
Elevation Profile
Course Stats
Mile Splits
| Mile | Grade |
|---|---|
| 1 | +0.0% |
| 2 | +0.1% |
| 3 | -0.1% |
| 4 | +0.0% |
| 5 | +0.0% |
| 6 | +0.0% |
| 7 | +0.1% |
| 8 | +1.8% |
| 9 | -0.2% |
| 10 | -1.0% |
| 11 | +0.0% |
| 12 | -0.5% |
| 13 | -0.1% |
| 14 | -0.0% |
| 15 | +0.0% |
| 16 | +0.1% |
| 17 | -0.1% |
| 18 | +0.0% |
| 19 | +0.0% |
| 20 | +0.0% |
| 21 | +0.1% |
| 22 | +0.4% |
| 23 | -0.5% |
| 24 | +0.6% |
| 25 | +1.0% |
| 26 | -1.6% |
| 27 | +0.1% |
RM Difficulty Index
Race-Day Weather History
Race-morning conditions on this date over the past 5 years: median 77°F with a 66°F dew point and 13 mph wind. 5 of 5 years were warm enough to slow race pace.
| Year | Temp | Dew Pt | Wind | Rain | Sky |
|---|---|---|---|---|---|
| 2025 | 77°F | 66°F | 11 mph | — | Partly cloudy |
| 2024 | 78°F | 66°F | 13 mph | — | Partly cloudy |
| 2021 | 75°F | 66°F | 13 mph | — | Partly cloudy |
| 2020 | 77°F | 68°F | 4 mph | — | Partly cloudy |
| 2019 | 77°F | 69°F | 15 mph | — | Drizzle |
Morning conditions (race window) on the Honolulu Marathon calendar date each year, from the ERA5 reanalysis archive — the race’s usual slot, not necessarily each edition’s exact day.
Honolulu Marathon Pace Calculator & Race Plan
Honolulu starts in the dark at 5am to beat the heat, but tropical humidity is still a factor even before sunrise. The course is mostly flat with one notable climb around Diamond Head crater. December weather is warm by mainland standards, typically 70-80°F with high humidity.
Heat and humidity are the main challenge here. Our model adjusts your splits for the dew point, which matters more than temperature for running performance. A 75°F day with tropical humidity hits harder than an 85°F day in dry air.
Honolulu Marathon FAQ
When is the next Honolulu Marathon?›
The next Honolulu Marathon is on Sunday, December 13, 2026.
How long is the Honolulu Marathon?›
The Honolulu Marathon is 26.2 miles (42.195 km), the standard marathon distance. It runs in Honolulu, HI.
How much elevation gain does the Honolulu Marathon have?›
The Honolulu Marathon has about 324 ft (99 m) of climbing and 323 ft of descent, with a maximum grade of 1.78%.
Is the Honolulu Marathon flat, downhill, or hilly?›
The Honolulu Marathon starts and finishes at roughly the same elevation (net +0 m). With 324 ft of total climbing along the way, it's a fast, flat course.
How hard is the Honolulu Marathon?›
Runner's Math scores the Honolulu Marathon 33/100 (Moderate) — #23 of 38 marathon courses in our library, ranked by modeled time cost. The profile costs about 0:34 versus a flat course for a runner at 4:00-marathon pace.
What's the weather usually like at the Honolulu Marathon?›
Over the past 5 years on this date, median race-morning conditions were 77°F with a 66°F dew point and 13 mph wind. 5 of 5 years were warm enough to slow race pace.