Race-day weather · Sunday, December 13, 2026

Honolulu Marathon weather.

25 Honolulu Marathon race mornings since 2000, measured hour by hour: temperature, dew point, wind, rain, and what the weather cost runners. The forecast for the 2026 race goes live here on Dec 7, six days out.

136 Typical score
at the start The median race morning since 2000: 71°F air + 65°F dew point at 5am, across 25 race mornings at the Honolulu International weather station. Real penalty: 2% to 3% slower.
Start · 5am13671° air · 65° dew point
+2 hours · 7am13671° air · 65° dew point
+4 hours · 9am14276° air · 66° dew point

Your goal pace on a typical race morning

Built from the median race morning since 2000, averaged across the hours you’d be running. Where the weather costs time, each cell gives the adjusted finish time and the pace per mile to run instead. Six days out, the real forecast replaces it.

Goal on a cool dayAdjusted finish
2:456:18/mi2:48 to 2:506:25–6:29/mi2% to 3% slower · score 137
3:006:52/mi3:04 to 3:057:00–7:04/mi2% to 3% slower · score 137
3:157:26/mi3:19 to 3:217:35–7:40/mi2% to 3% slower · score 137
3:308:01/mi3:34 to 3:368:10–8:15/mi2% to 3% slower · score 138
3:458:35/mi3:50 to 3:528:45–8:50/mi2% to 3% slower · score 138
4:009:09/mi4:05 to 4:079:20–9:26/mi2% to 3% slower · score 138
4:3010:18/mi4:35 to 4:3810:30–10:36/mi2% to 3% slower · score 139
5:0011:27/mi5:06 to 5:0911:40–11:47/mi2% to 3% slower · score 139
How I’d race a typical year

Give up 2% to 3% before the gun and race the first half by effort, not the watch. Take fluid with sodium at every station and cool your head and neck early. A calm first half is worth more today than any time you could bank.

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Honolulu Marathon weather history: every race morning since 2000

Every row in the table below is a measurement from the Honolulu International weather station, taken nearest 5am (today’s first-wave start) and again three hours later. Start times have moved over the years, so treat 5am as a clock time, not always the gun. Across 25 race mornings:

  • A typical 5am reading is 71°F with a 65°F dew point, a combined score of 136.
  • The warmest was 2022: 75°F with a 65°F dew point at 5am, a score of 140.
  • The most humid was 2025, with a 71°F dew point.
  • The coldest was 2009, at 67°F.
  • On 25 of 25 race mornings the 5am score was above 100, enough to call for a pace adjustment. Three hours later, 25 of 25 were.
  • The windiest start was 2001: ENE wind at 17 mph.
  • Rain fell in the first 5 hours on 5 of 25 race mornings (1 more saw only a trace). The most rain measured was 1.07 inches, in 2025.
Honolulu Marathon weather by year · air / dew point (°F), combined score, wind and rain
YearDateAir / dew at 5amScoreAir / dew at 8amScoreWind at 5amRain
2025Dec 1474° / 71°14577° / 73°150SSW 5 mph1.07 in
2024Dec 872° / 67°13973° / 67°140CalmHeavy rain
2023Dec 1071° / 68°13975° / 71°146N 5 mphDry
2022Dec 1175° / 65°14076° / 65°141NNE 8 mphgusts 20Dry
2021Dec 1273° / 67°14075° / 66°141ENE 12 mphgusts 21Dry
2020–Virtual only (COVID-19), no race morning
2019Dec 868° / 64°13272° / 65°137N 5 mphDry
2018Dec 973° / 59°13275° / 59°134NNE 13 mphDry
2017Dec 1071° / 64°13572° / 64°136NNW 5 mphDry
2016Dec 1171° / 66°13770° / 66°136N 5 mphDry
2015Dec 1371° / 68°13972° / 68°140CalmDry
2014Dec 1470° / 67°13771° / 66°137NE 6 mphLight rain
2013Dec 870° / 63°13373° / 66°139NNW 3 mphDry
2012Dec 973° / 65°13875° / 66°141ENE 9 mphDry
2011Dec 1173° / 66°13974° / 66°140NE 9 mphgusts 18Light rain
2010Dec 1269° / 66°13570° / 66°136NW 3 mphDry
2009Dec 1367° / 62°12969° / 63°132CalmDry
2008Dec 1471° / 68°13971° / 68°139ESE 7 mph0.01 in
2007Dec 971° / 66°13774° / 67°141CalmDry
2006Dec 1072° / 59°13171° / 61°132E 8 mphDry
2005Dec 1172° / 64°13674° / 65°139NE 7 mphDry
2004Dec 1267° / 61°12869° / 61°130CalmDry
2003Dec 1474° / 65°13976° / 60°136ENE 13 mphDry
2002Dec 870° / 57°12773° / 56°129NE 8 mphDry
2001Dec 973° / 65°13875° / 65°140ENE 17 mphTrace
2000Dec 1068° / 64°13271° / 65°136N 3 mphDry

Readings from the Honolulu International ASOS weather station (NOAA/FAA, via the Iowa Environmental Mesonet), the observation nearest each hour. Scores above 100 call for a pace adjustment. Rain is the total the station measured in the 5 hours after 5am. Download every hour as a CSV.

How the score works

Add the air temperature to the dew point, both in Fahrenheit. That combined score is closer to what your body feels than the temperature alone, because dew point decides whether your sweat can evaporate, and evaporating sweat is how you shed heat at race pace. The bands below are the same ones my heat pace calculator uses, and that page has the full chart and the physiology behind it.

Combined score → how much to slow down
  • 100 or lessNo pace adjustment
  • 101 – 1100% to 0.5% slower
  • 111 – 1200.5% to 1% slower
  • 121 – 1301% to 2% slower
  • 131 – 1402% to 3% slower
  • 141 – 1503% to 4.5% slower
  • 151 – 1604.5% to 6% slower
  • 161 – 1706% to 8% slower
  • 171 – 1808% to 10% slower
  • Above 180Hard running is not recommended

The bands are a coach's rule of thumb, not a lab measurement. Treat each range as a starting point and let effort make the final call.

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Other race-day weather pages

Twin Cities MarathonSunday, October 4, 202695Race day at the startNo adjustment needed Chicago MarathonSunday, October 11, 2026113Race day at the startSlight penalty: 0.5% to 1% slower Columbus MarathonSunday, October 18, 202666Forecast at the startNo adjustment needed Detroit MarathonSunday, October 18, 202673Forecast at the startNo adjustment needed Marine Corps MarathonSunday, October 25, 202694Typical startNo adjustment needed NYC MarathonSunday, November 1, 202683Typical startNo adjustment needed Philadelphia MarathonSunday, November 22, 202673Typical startNo adjustment needed California International MarathonSunday, December 6, 202683Typical startNo adjustment needed Houston MarathonSunday, January 17, 202784Typical startNo adjustment needed LA MarathonSunday, March 7, 202799Typical startNo adjustment needed Boston MarathonMonday, April 19, 202784Typical startNo adjustment needed Grandma's MarathonSaturday, June 19, 2027112Typical startSlight penalty: 0.5% to 1% slower

All race-day weather pages

RunFitCoach is not affiliated with the JAL Honolulu Marathon or its organizers. Observations from the Honolulu International ASOS station (NOAA/FAA) via the Iowa Environmental Mesonet. Data updated Thursday, October 15, 2026.

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