Hilo Weather in December
Thinking of visiting Hilo in December? Expect high temperatures reaching 23°C (73°F) during the day, dropping to 18°C (64°F) at night, and note that quite a bit of rainfall is likely.
Rainfall in Hilo in December
Looking at the last 30 years, the data shows about 17 days with rain, averaging 196 mm (7.7 in) for the month. Expect frequent rainfall this month, and not just light drizzle. When it rains, it tends to come down hard.
Temperature in Hilo in December
December in Hilo sees highs of 23°C (73°F) and lows of 18°C (64°F) overnight. This gives the month a fairly typical daily rhythm, with warmer afternoons and more comfortable nights. Nights drop to around 18°C (64°F), which is noticeably cooler than the daytime. A light jacket for the evening is a sensible addition, and the cool nights tend to make sleeping comfortable.
Sunshine in Hilo in December
With about 127 hours of sunshine, the area enjoys a nice balance of sun and overcast, creating a pleasant environment.Our weather planner can help you find worldwide destinations with pleasant weather during this period. January, May, June, July, August, September and October typically offer the best weather for Hilo.
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 Hilo's climate page.
Hilo Temperature in December
Min Temperature
18°C (64°F)
Max Temperature
23°C (73°F)
Chance of Rain
58%
Precipitation
196 mm (7.7 in)
Rainy days
17 days
Humidity
78%
Sunshine
127 hours
Percentage Sunshine
37%
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Hilo typically stay consistent throughout December, with daily highs averaging around 23°C (73°F). Nights are pleasant, with lows around 18°C (64°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 for Hilo in December
Browse day-by-day weather records for Hilo spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Hilo historical weather extremes in December
Based on 27 years of weather observations in Hilo between 1998 and 2025, these are the recorded extremes.
- Hilo recorded its highest December temperature of 31°C (88°F) on December 14, 2025.
- The coldest December day was on December 21, 2021, with a maximum of 21°C (70°F).
- The lowest overnight temperature recorded in December was 12°C (54°F) (December 18, 2022).
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
What to Wear in Hilo in December
For Hilo in December, you'll want flexible clothing. It's wise to pack cotton shirts, comfortable shorts, and a pair of jeans for cooler evenings. A light sweater or jacket is useful for air-conditioned spaces (like buses) or unexpected cool moments. Also bring a poncho, it will rain a lot! Waterproof everything you can. Sunglasses could come in handy during the sunnier parts of your trip.What To Do in Hilo in December
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 Hilo's climate page.
Temperature Rainfall Sunshine Humidity
See the full Hilo climate overview or explore weather in the United States of America.
