The Big Island Weather in September

Average temperatures, rainfall, sunshine and the best places to visit in The Big Island, the United States of America in September.

Thinking about venturing to The Big Island, the United States of America this September and curious about the weather conditions to expect? This page holds all the key information you seek, responding to your question:

What to Expect in The Big Island in September

The Big Island, the United States of America is a region in the United States of America. September in The Big Island generally has warm temperatures, with precipitation levels ranging from low to heavy.

Temperatures

The average maximum temperatures are warm and range from 23°C (73°F) in Volcano to 28°C (82°F) in Pahoa. Nighttime temperatures generally drop to 23°C (73°F) in Pahoa and 18°C (64°F) in Volcano.

For specific regional insights in The Big Island, the United States of America, refer to the map provided below.

Precipitation

In September, precipitation varies across different areas. From low rainfall in Hawi with an average of 30 mm (1.2 in) to heavy rainfall in Captain Cook with 530 mm (21 in).

Average sunshine

September brings good sunshine to many areas. Kailua-Kona sees around 260 hours of sunlight, great for visitors looking for bright days.

Explore The Big Island by month

Pick a month to see the average temperature, rainfall and sunshine in The Big Island — and find the best time to visit. (based on Kailua-Kona)

Best Places to Visit in The Big Island in September

Click on a destination dot for more details. Toggle the map to compare temperatures or precipitation across The Big Island.

perfect weather
pleasant
tolerable
unpleasant
poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).

Popular Destinations in The Big Island

What is the weather like in September for some of the most popular destinations in The Big Island, the United States of America?

Temperature range in The Big Island (September)

Precipitation variation in The Big Island (September)

Kailua-Kona

In September Kailua-Kona generally has high temperatures with maximum daytime temperatures around 26°C (79°F), minimum nighttime temperatures around 22°C (72°F) and heavy monthly rainfall. So on average the conditions are poor that month.

August
September
October
Max temperature
26°C (79°F)
26°C (79°F)
25°C (77°F)
Min temperature
22°C (72°F)
22°C (72°F)
22°C (72°F)
Monthly sun hours
280 hours
260 hours
250 hours
Monthly rainfall
422 mm (17 in)
356 mm (14 in)
270 mm (11 in)
Monthly rainy days
18 days
16 days
17 days
Weather conditions

Waikoloa

In September Waikoloa generally has high temperatures with maximum daytime temperatures around 27°C (81°F), minimum nighttime temperatures around 20°C (68°F) and heavy monthly rainfall. So on average the conditions are poor that month.

August
September
October
Max temperature
27°C (81°F)
27°C (81°F)
26°C (79°F)
Min temperature
20°C (68°F)
20°C (68°F)
19°C (66°F)
Monthly sun hours
280 hours
260 hours
250 hours
Monthly rainfall
341 mm (13 in)
296 mm (12 in)
222 mm (8.7 in)
Monthly rainy days
19 days
17 days
18 days
Weather conditions

Hapuna Beach

In September Hapuna Beach generally has high temperatures with maximum daytime temperatures around 28°C (82°F), minimum nighttime temperatures around 21°C (70°F) and heavy monthly rainfall. So on average the conditions are unpleasant that month.

August
September
October
Max temperature
28°C (82°F)
28°C (82°F)
27°C (81°F)
Min temperature
21°C (70°F)
21°C (70°F)
20°C (68°F)
Monthly sun hours
280 hours
260 hours
250 hours
Monthly rainfall
272 mm (11 in)
238 mm (9.4 in)
181 mm (7.1 in)
Monthly rainy days
19 days
17 days
18 days
Weather conditions

Kaupulehu

In September Kaupulehu generally has high temperatures with maximum daytime temperatures around 26°C (79°F), minimum nighttime temperatures around 22°C (72°F) and heavy monthly rainfall. So on average the conditions are poor that month.

August
September
October
Max temperature
27°C (81°F)
26°C (79°F)
26°C (79°F)
Min temperature
22°C (72°F)
22°C (72°F)
22°C (72°F)
Monthly sun hours
280 hours
260 hours
250 hours
Monthly rainfall
345 mm (14 in)
302 mm (12 in)
223 mm (8.8 in)
Monthly rainy days
18 days
16 days
17 days
Weather conditions

Kalaoa

In September Kalaoa generally has high temperatures with maximum daytime temperatures around 26°C (79°F), minimum nighttime temperatures around 22°C (72°F) and heavy monthly rainfall. So on average the conditions are poor that month.

August
September
October
Max temperature
26°C (79°F)
26°C (79°F)
26°C (79°F)
Min temperature
22°C (72°F)
22°C (72°F)
21°C (70°F)
Monthly sun hours
280 hours
260 hours
250 hours
Monthly rainfall
400 mm (16 in)
349 mm (14 in)
256 mm (10 in)
Monthly rainy days
18 days
16 days
17 days
Weather conditions

Is your destination not in the list? Have a look at all destinations in The Big Island, in the United States of America.

Popular cities in September

Day & night temperatures, rainfall and average weather in The Big Island in September.

City Weather Day temp Night temp Rainfall
Kailua-Kona 26°C (79°F) 22°C (72°F) 356 mm (14 in)
Waikoloa 27°C (81°F) 20°C (68°F) 296 mm (12 in)
Hapuna Beach 28°C (82°F) 21°C (70°F) 238 mm (9.4 in)
Kaupulehu 26°C (79°F) 22°C (72°F) 302 mm (12 in)
Kalaoa 26°C (79°F) 22°C (72°F) 349 mm (14 in)
Waimea 27°C (81°F) 20°C (68°F) 170 mm (6.7 in)

The Big Island weather in September: frequently asked questions

What is the weather like in The Big Island, the United States of America in September?

In September, The Big Island, the United States of America generally has poor weather conditions. Kailua-Kona sees daytime temperatures near 26°C (79°F), with nights cooling to roughly 22°C (72°F).

What is the average temperature in The Big Island, the United States of America in September?

In Kailua-Kona, the average daytime high in September is 26°C (79°F), while nighttime temperatures drop to around 22°C (72°F).

Does The Big Island, the United States of America get a lot of rain in September?

Expect plenty of rainfall. Kailua-Kona records an average of 356 mm (14 in) in September, putting it among the wetter months for The Big Island, the United States of America.

Is September a Good Time to Visit The Big Island, the United States of America?

Given the typically poor weather conditions in Kailua-Kona, September may not be the ideal time to visit The Big Island, the United States of America.

Generally speaking, January, February and December provide pleasant weather in Kailua-Kona. In contrast, April, May, June, July, August, September and October tend to have poor weather conditions.

Interested in more climate information?

We have much more information about the climate in The Big Island.

Weather and climate has detailed information for every country in the world. Are you going to the United States of America? Get detailed historical weather averages for many cities in the United States of America.

Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal travel conditions. Find out where to go with our weather planner.

Bucket list

Need travel inspiration? Check out our bucket list articles and be inspired.