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 perfect 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.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Koloa's climate page.
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% *
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 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 27 years of weather observations (1998-2025), 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
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unpleasant
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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.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Koloa's climate page.
Temperature Rainfall Sunshine Humidity Wind Speed Water Temp
See the full Koloa climate overview or explore weather in the United States of America.
