Will it rain today in Kailua-Kona?
Should you take an umbrella in Kailua-Kona? The forecast below loads live every time you open the page: rain now, when the next shower comes, and how much falls today and tomorrow.
Rain right now
Dry in Kailua-Kona for now; rain expected from about 14:00. Today’s total: 2.1 mm over 9 wet hours. Tomorrow: 2.2 mm of rain.
As of 2026-10-16 17:35 UTC (NOAA GFS snapshot). Updating live…
Rain every 3 hours, today and tomorrow
Today · Friday 16 October
2.1 mm of rain, 9 wet hours, up to 0.2 mm/h.
Every 3 hours as a table
| Hours | Rain (mm) | mm/h | Type |
|---|---|---|---|
| 23:00–02:00 | 0.1 | 0 | dry |
| 02:00–05:00 | 0 | 0 | dry |
| 05:00–08:00 | 0.1 | 0 | dry |
| 08:00–11:00 | 0.1 | 0 | dry |
| 11:00–14:00 | 0.2 | 0.1 | dry |
| 14:00–17:00 | 0.5 | 0.2 | light · rain |
| 17:00–20:00 | 0.6 | 0.2 | light · rain |
| 20:00–23:00 | 0.5 | 0.2 | light · rain |
Tomorrow · Saturday 17 October
2.2 mm of rain, 9 wet hours, up to 0.2 mm/h.
Every 3 hours as a table
| Hours | Rain (mm) | mm/h | Type |
|---|---|---|---|
| 23:00–02:00 | 0.4 | 0.1 | light · rain |
| 02:00–05:00 | 0.2 | 0.1 | dry |
| 05:00–08:00 | 0.1 | 0 | dry |
| 08:00–11:00 | 0.1 | 0 | dry |
| 11:00–14:00 | 0.1 | 0 | dry |
| 14:00–17:00 | 0.2 | 0.1 | dry |
| 17:00–20:00 | 0.6 | 0.2 | light · rain |
| 20:00–23:00 | 0.6 | 0.2 | light · rain |
Times in local time (Pacific/Honolulu). Each bar is the rain over 3 hours; striped bars are snow.
Rain map around Kailua-Kona
The same NOAA GFS precipitation on the map, moving hour by hour: blue light, darker heavy. Tap for the value.
How much it rains in Kailua-Kona, month by month
Kailua-Kona gets about 938 mm of rain a year. The wettest month is March (134 mm), the driest September (49 mm); a normal October brings 67 mm.
Average monthly rain and snow (water equivalent) 2001–2025, NASA POWER (MERRA-2 reanalysis, public domain), on a ~50 km grid: mountains and coasts can differ locally.
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Questions
- Will it rain today in Kailua-Kona?
- At 16 October 2026 the forecast said: Dry in Kailua-Kona for now; rain expected from about 14:00. Today’s total: 2.1 mm over 9 wet hours. Tomorrow: 2.2 mm of rain. The box at the top of the page loads the latest NOAA GFS forecast every time you open it, with the time the next rain starts.
- How much does it rain in Kailua-Kona?
- About 938 mm a year on average (2001–2025). March is the wettest month with 134 mm, September the driest with 49 mm.
- What do the rain amounts mean?
- 1 mm is a litre of water per square metre. Under 2.5 mm an hour is light rain (a drizzle to a steady rain), 2.5–7.6 moderate, above 7.6 heavy: you get soaked in minutes and streets can flood.
- How accurate is the forecast?
- It is the global NOAA GFS model on a 0.25° grid every 3 hours: good at telling a rainy day from a dry one, less at placing a single summer thunderstorm. Check the rain map for the showers moving around Kailua-Kona.
Rain forecast nearby
Kahului (Maui) · Honolulu · San Francisco · San Jose · Sacramento · Los Angeles
How this page works
The rain is the one the rain layer of the map paints: NOAA GFS forecast (public domain), precipitation rate averaged over 3 hours, read at Kailua-Kona and summed per local day. Rain or snow comes from the GFS precipitation type. The monthly normals are NASA POWER. No third-party weather service.