September in Kailua-Kona, HI: variable for golf — mixed conditions — check the live score. Best tee times: morning before noon for the most comfortable round.
| Average September Weather | |
|---|---|
| Avg daily high | 82°F |
| Avg daily low | 73°F |
| Rainy days | 23 / mo |
| Avg peak wind | 7 mph |
September in Kailua-Kona sits in an unusual stretch where almost nothing changes on the thermometer — highs hold at 82°F, lows at 73°F — yet the month earns its Variable badge through persistent rainfall. With 23 precipitation days, it ties August as the 4th-wettest month of the year, meaning brief showers are a near-daily reality rather than an occasional inconvenience. Wind, however, is as calm as it gets anywhere on the calendar: 7 mph peak makes this the calmest month of the year, tied only with April.
That combination — warm, humid, still air interrupted by frequent light showers — defines what golf in Kailua-Kona in September actually feels like. The 9°F daily swing (73°F to 82°F) means mornings are the most comfortable window before heat and humidity build. Highs nudge above the 60–80°F ideal band while mornings sit comfortably within it, so heat management matters more than layering.
With 23 rainy days and showers that tend to build through the afternoon, booking the earliest available tee time — ideally before 8 AM — gives you the best chance of completing a dry front nine before midday convection kicks in. The calm 7 mph winds are most consistent in the early morning hours before surface heating develops, adding another reason to start as early as the course allows. See how conditions rate hour by hour on our playability scale.
September and August are statistically identical twins: same 82°F high, same 73°F low, same 23 precipitation days, with only a 0.4 mph difference in peak wind favoring September's slightly calmer air. The real shift comes on the back end — moving into October, two fewer precipitation days (21 vs. 23) offer a modest but measurable improvement in round-to-round reliability, even though temperatures and wind remain essentially unchanged. If your schedule has any flexibility, October edges September purely on the precipitation count.
Climate normals show the long-term picture, but day-to-day weather varies. Check today's live golf weather score for Kailua-Kona, HI for the current playability rating, hourly wind, temperature, and the recommended tee time window.
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It depends on your tolerance for rain interruptions. September averages 23 precipitation days, tying August as the 4th-wettest month, so some form of shower is likely on most rounds. The upside is that peak winds are the calmest of any month at 7 mph, and temperatures hold at a steady 82°F high — conditions that suit golfers who don't mind occasional wet weather but want benign wind and consistent warmth.
With nearly three-quarters of September days logging measurable precipitation, fairways on Kona's lava-based courses tend to stay firm underneath because drainage through the volcanic substrate is fast, but cart paths and approach areas can become slick quickly after a shower. Morning tee times typically catch courses at their driest before afternoon convective showers arrive. Two fewer rain days in October suggest conditions improve slightly if you can wait.