Waimanalo Weather in September

September is one of the perfect months to visit Waimanalo, with daytime temperatures of 28°C (82°F) and lows of 25°C (77°F) at night. Some rainfall is typical for this time of year.

Rainfall in Waimanalo in September

You can expect rain on around 8 days based on historical patterns, with 27 mm (1.1 in) average for the month. Rain this month is fairly typical, a standard mix of wet and dry days with no particularly heavy or persistent showers.

Temperature in Waimanalo in September

Weather in Waimanalo is at its perfect in September. Highs reach 28°C (82°F), while nights settle around 25°C (77°F). The days can feel warmer than the evenings, so packing for both parts of the day is a good idea. At 25°C (77°F) overnight, it stays warm after dark. Light, breathable clothing and good airflow in your room make a noticeable difference. It's the warmest month of the year on average, so summer clothing is the way to go.

Sunshine in Waimanalo in September

The city usually sees around 279 hours of sunlight, indicating many sunny days — a great month for sightseeing.

Wind Speed in Waimanalo in September

September sees wind speeds averaging 4 m/s (8 knots). You'll experience variable conditions with moderate winds that create small waves on water and keep branches moving. Conditions range from light winds to moderate breezes throughout the month.

Average water temperature in September

With water at 27°C (81°F), you can expect warm, pleasant conditions for any water activity. There's no adjustment period — it feels comfortable straight away.

If you're planning additional trips, our weather planner can help you find destinations that match your weather preferences.

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit the United States of America, check out our Waimanalo's climate page.

Waimanalo Temperature in September

Min Temperature 25°C (77°F)  

Max Temperature 28°C (82°F)  

Water Temperature 27°C (81°F) *  

Chance of Rain 26%  

Precipitation 27 mm (1.1 in)  

Rainy days 8 days  

Humidity 66% *  

Windspeed 4 m/s (8 knots) *  

Sunshine 279 hours *  

Percentage Sunshine 76% *  

* Data from: Honolulu, the United States of America (21 KM, 13 Miles).

What to Wear in Waimanalo in September

Warm but pleasant conditions in Waimanalo in September. Focus on lightweight, maybe with natural fabrics, cotton blend shirts, comfortable shorts, and breathable footwear. A light cover-up for sun protection is smart too. Light rain is possible, so consider bringing a small umbrella or rain jacket. The water temperature sits at about 27°C (81°F), making it perfect for swimming and water activities. Don't forget to pack your favorite swimwear and perhaps some snorkel gear. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.

What To Do in Waimanalo in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

10/10

Cycling

8/10

Walking

8/10

Barbeque

10/10

Camping

10/10

Outdoor sports

8/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit the United States of America, check out our Waimanalo's climate page.

More climate data for Waimanalo

Temperature Rainfall Sunshine Humidity Wind Speed Water Temp

See the full Waimanalo climate overview or explore weather in the United States of America.