Koloa
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Koloa Weather in July

July in Koloa averages 27°C (81°F) during the day and 23°C (73°F) at night. With just 42 mm (1.7 in) of rainfall on average, it doesn't get much drier than this.

Rainfall in Koloa in July

This is the driest month of the year. Historically, approximately 19 days this month are expected to have rain, averaging 42 mm (1.7 in). With rain spread across many days but low totals, showers are typically short and light rather than heavy.

Temperature in Koloa in July

July tends to be one of the excellent months in Koloa, with 27°C (81°F) in the afternoon and 23°C (73°F) overnight. The days can feel warmer than the evenings, so packing for both parts of the day is a good idea. At 23°C (73°F) overnight, it stays warm after dark. Light, breathable clothing and good airflow in your room make a noticeable difference.

Sunshine in Koloa in July

Expect a lot of sunshine this month, with about 260 hours of sun. These sunny conditions add to the overall experience.

Wind Speed in Koloa in July

Wind speeds average 5 m/s (10 knots) during July. At this speed, gentle to moderate breezes make small trees sway and the wind creates whitecaps on water bodies. Daily variations range from moderate winds to stronger breezes, creating excellent conditions for sailing, kite flying and wind sports.

Average water temperature in July

At 26°C (79°F), the water is warm and comfortable for swimming. Most people find this temperature ideal for spending longer periods in the water.

Our weather planner can help you explore other travel destinations worldwide.

Koloa Temperature in July

Min Temperature
23°C (73°F)
Max Temperature
27°C (81°F)
Water Temperature
26°C (79°F) *
Chance of Rain
62%
Precipitation
42 mm (1.7 in)
Rainy days
19 days
Humidity
74% *
Windspeed
5 m/s (10 knots) *
Sunshine
260 hours *
Percentage Sunshine
61% *
* Data from: Lihue, the United States of America (16 KM, 10 Miles).

Koloa Weather by Month

Pick a month to see the average temperature, rainfall and sunshine in Koloa - and find the best time to visit.

Daily Historical Temperatures

50-year average (1976-2025)

Based on our historical records, temperatures in Koloa typically stay consistent throughout July, with daily highs averaging around 27°C (81°F). Nights are warm, with lows around 24°C (75°F).

Average temperatures in July

Daily Historical Precipitation

50-year average (1976-2025)

Average daily rainfall for each day of the month based on long-term records.

Average precipitation in July

Historical weather records for Koloa in July

Browse day-by-day weather records for Koloa spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.

Koloa historical weather extremes in July

Based on 28 years of weather observations (1998-2026), these are the most extreme conditions recorded in Koloa.

  • On July 14, 2017, temperatures climbed to 32°C (90°F), marking the warmest July day on record.
  • The coldest July day was on July 5, 2016, with a maximum of 26°C (79°F).
  • Nighttime temperatures dropped to 18°C (64°F) on July 15, 2018, marking the coldest July night on record.

Best Places in the United States of America in July

Find out more about the weather in the United States of America and which places have the best travel conditions in this month. See all of the United States of America in July →

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).

What to Wear in Koloa in July

Warm but pleasant conditions in Koloa in July. 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. Wet weather is likely, so pack waterproof gear for multiple rainy days. With water temperatures around 26°C (79°F), swimming conditions are excellent. Pack your swimsuit, goggles, and maybe some water shoes. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.

What To Do in Koloa in July

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

Koloa 3-Day Forecast

Popular in July

Where to go in July - average daytime high across popular destinations.

Bucket list

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