What is the weather like in Big Island in September?

Typical September temperatures in Big Island run about 87/69°F (high/low), with very little rain.

When is the best time to visit Big Island?

April-May and September-October; Kona side stays dry nearly year-round. For the best value, aim for May and September.

Weather, crowds, and prices — and whether September is your month.

Quick answer · Great value

The value month: summer conditions, no crowds. Expect highs around 87°F, very little rain, moderate, and good value.

87/69°F

Typical high / low

Very little rain

Rain

Moderate

Crowds

Good value

Prices

Best overall: April-May and September-October; Kona side stays dry nearly year-round.
Best value: May and September.
Watch out for: None serious — Hilo side is rainy year-round by design.

Month	High/Low	Rain	Crowds	Prices
January	80/64°	Occasional showers	Peak crowds	Peak prices
February	80/63°	Occasional showers	Busy	Peak prices
March	81/64°	Occasional showers	Busy	Peak prices
April	82/65°	Occasional showers	Busy	Above average
May	84/66°	Very little rain	Moderate	Good value
June	85/68°	Very little rain	Busy	Above average
July	86/69°	Very little rain	Peak crowds	Peak prices
August	87/70°	Very little rain	Peak crowds	Above average
September ←	87/69°	Very little rain	Moderate	Good value
October	86/68°	Occasional showers	Moderate	Good value
November	83/66°	Occasional showers	Moderate	Good value
December	81/65°	Occasional showers	Peak crowds	Peak prices

Browse the Big Island guides — the full destination profile, all-inclusive resorts, family trips, and honeymoons — or skip the research entirely.

Want September priced for your exact dates?

Courtney Geisel, an independent travel advisor, prices real Big Island trips every week — free, because resorts pay her, not you.