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Kahului Weather in December
Kahului in December averages 27°C (81°F) during the day and 21°C (70°F) at night. Keep in mind that quite a bit of rainfall is expected this month.
Rainfall in Kahului in December
You can typically expect 12 days of rain this month, averaging around 68 mm (2.7 in). A fairly balanced picture this month, some wet days but nothing too extreme in terms of intensity.
Temperature in Kahului in December
The temperature in Kahului in December is excellent. Daytime highs reach 27°C (81°F), with nights dropping to 21°C (70°F). This kind of day-to-night contrast is typical for this time of year. Nights are mild at around 21°C (70°F), which is comfortable for most people.
Sunshine in Kahului in December
Expect sunny days throughout the month, with an estimated 213 hours of sunshine. This makes it a pleasant time to visit Kahului.
Wind Speed in Kahului in December
Wind speeds average 4 m/s (8 knots) during December. At this speed, expect moderate winds that can raise dust and move small branches. Since this is an average, some days have gentle light winds while others experience stronger breezes that are quite noticeable.
Average water temperature in December
The water is 25°C (77°F) this month, warm enough that getting in requires no effort at all. Good conditions for swimming, snorkeling, or just floating around.Our weather planner can help you explore other travel destinations worldwide.
Kahului Temperature in December
Min Temperature
21°C (70°F)
Max Temperature
27°C (81°F)
Water Temperature
25°C (77°F)
Chance of Rain
40%
Precipitation
68 mm (2.7 in)
Rainy days
12 days
Humidity
77%
Windspeed
4 m/s (8 knots)
Sunshine
213 hours
Percentage Sunshine
63%
Kahului Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Kahului - and find the best time to visit.
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Kahului typically stay consistent throughout December, with daily highs averaging around 27°C (81°F). Nights are pleasant, with lows around 19°C (66°F).
Average temperatures in December
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 December
Historical weather records for Kahului in December
Browse day-by-day weather records for Kahului spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Kahului historical weather extremes in December
Based on 49 years of weather observations in Kahului between 1976 and 2025, these are the recorded extremes.
- On December 10, 2023, temperatures climbed to 32°C (90°F), marking the warmest December day on record.
- Kahului experienced its chilliest December day on December 20, 2017, reaching only 22°C (72°F).
- Nighttime temperatures dropped to 13°C (55°F) on December 18, 1983, marking the coldest December night on record.
Best Places in the United States of America in December
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 December →
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 Kahului in December
Warm weather calls for comfortable, breathable clothing in December. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). Rain is likely on several days, so bring a good rain jacket. With water temperatures around 25°C (77°F), swimming conditions are excellent. Pack your swimsuit, goggles, and maybe some water shoes. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.
What To Do in Kahului in December
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Swimming9/10 -
Cycling8/10 -
Walking8/10 -
Camping8/10 -
Outdoor sports8/10
Kahului 3-Day Forecast
More climate data for Kahului
Temperature Rainfall Sunshine Humidity Wind Speed Water Temp
See the full Kahului climate overview or explore weather in the United States of America.
Popular in December
Where to go in December - average daytime high across popular destinations.
Miami Beach
25°C (77°F) Kissimmee24°C (75°F) Orlando
24°C (75°F) Destin
18°C (64°F) Los Angeles18°C (64°F) Big Bear Lake9°C (48°F) New York City8°C (46°F) Bucket list
Need travel inspiration? Check out our bucket list articles and be inspired.
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