Will it rain in
Honolulu today?
Live hourly rain forecast and run verdict for Honolulu, Hawaii, US.
Running in Honolulu means enjoying tropical warmth year-round — but trade wind showers can soak you in seconds. Whether it's a humid morning along Waikiki, a sudden downpour on the Diamond Head trail, or a rare Kona wind bringing muggy conditions, knowing whether to head out before you lace up matters. RainOrRun checks live conditions in Honolulu right now and gives you an instant verdict — plus the best hourly window if the weather's on the fence. We'll also recommend the right gear for whatever Honolulu's island weather is throwing at you today.
What to wear
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How often does it rain in Honolulu?
Honolulu records around 462mm of rain a year, spread across about 99 days — roughly 27% of all days, or 8 days in an average month. That puts Honolulu mid-pack: rain interrupts roughly one run in three, so it pays to check the hourly forecast before a long run, but you will not be running in waterproofs week after week.
The wettest month is December, averaging 55mm across about 7 rainy days. The driest is July, with 20mm over roughly 7 days. Even in February, average lows stay around 20.1°C, so cold is rarely the limiting factor here. At the other end, August averages 29.1°C highs — hot enough that early morning and evening are the sensible windows, and hydration matters more than waterproofing.
Those are ten-year averages, not a forecast. What actually matters on the day is the next twelve hours — which is what the live verdict and hourly strip at the top of this page are for.
| Month | Rainfall | Rainy days | Avg high | Avg low |
|---|---|---|---|---|
| January | 37mm | 7 | 25.2°C | 20.2°C |
| February | 50mm | 8 | 24.7°C | 20.1°C |
| March | 52mm | 10 | 25°C | 20.4°C |
| April | 45mm | 11 | 26°C | 21.4°C |
| May | 42mm | 9 | 26.8°C | 22°C |
| June | 26mm | 7 | 28°C | 23°C |
| July | 20mm | 7 | 28.6°C | 23.7°C |
| August | 37mm | 9 | 29.1°C | 24°C |
| September | 27mm | 8 | 29°C | 24°C |
| October | 39mm | 10 | 28.2°C | 23.3°C |
| November | 32mm | 6 | 26.9°C | 22.5°C |
| December | 55mm | 7 | 25.7°C | 21.2°C |
Historical data: Open-Meteo archive, 2015–2024. A “rainy day” means at least 1mm of precipitation.
Running in Honolulu: common questions
Will it rain in Honolulu today?
The forecast card at the top of this page shows Honolulu's rain probability for the current hour, plus an hour-by-hour breakdown for the rest of the day, using live Open-Meteo data. Historically, Honolulu sees rain on about 99 days a year, so on any given day there is roughly a 27% chance of some rain falling.
Is it a good day to run in Honolulu?
RainOrRun scores the live Honolulu forecast on rain probability, rainfall amount, temperature, wind speed and severe weather, then returns a single verdict: Go, Maybe, or Don't Bother. A Maybe means conditions are borderline and it is worth picking your window rather than skipping the run.
What is the best time to run in Honolulu today?
The hourly strip above highlights the best single window of the day for Honolulu — the hour combining the lowest rain probability with the most comfortable temperature. You can also check up to eight days ahead using the date picker if you are planning a long run or a race.
What should I wear running in Honolulu today?
The gear section on this page updates with the live Honolulu forecast: a waterproof jacket and peaked cap when rain probability goes above 40%, a thermal base layer and gloves below 8 degrees Celsius, and a high-vis vest when wind or low light make you harder to see.
What is the wettest month in Honolulu?
December is the wettest month in Honolulu, averaging 55mm of rain across about 7 rainy days. July is the driest, with around 20mm over roughly 7 days. Figures are ten-year averages covering 2015 to 2024.
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