Hilo Weather in April
April in Hilo typically sees daytime highs of 23°C (73°F) and nighttime lows of 18°C (64°F). April falls within the rainy season, so heavy rainfall is to be expected.
Rainfall in Hilo in April
As part of the rainy season, Hilo sees around 20 days of rain in April, with an average of 205 mm (8.1 in). Rainy season showers tend to be fairly substantial. A good rain jacket or umbrella is worth having with you most days.
Temperature in Hilo in April
April in Hilo sees highs of 23°C (73°F) and lows of 18°C (64°F) overnight. This kind of day-to-night contrast is typical for this time of year. Nights cool down to 18°C (64°F), so a light jacket or extra layer is useful once the sun goes down. On the plus side, the cooler nights make for comfortable sleeping conditions.
Sunshine in Hilo in April
The area enjoys a balanced 137 hours of sunlight, ensuring it's neither too rainy nor too sunny.If your ideal day consists of dry skies and pleasant temperatures, January, May, June, July, August, September and October typically offer the best circumstances 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 April
Min Temperature
18°C (64°F)
Max Temperature
23°C (73°F)
Chance of Rain
68%
Precipitation
205 mm (8.1 in)
Rainy days
20 days
Humidity
80%
Sunshine
137 hours
Percentage Sunshine
36%
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Hilo typically stay consistent throughout April, with daily highs averaging around 23°C (73°F). Nights are pleasant, with lows around 19°C (66°F).
Average temperatures in April
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 April
Historical weather for Hilo in April
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 April
Our historical data for Hilo spans 1998 to 2026, revealing these weather extremes.
- The hottest April day on record in Hilo reached 31°C (88°F) (April 29, 2017).
- Hilo experienced its chilliest April day on April 14, 2010, reaching only 20°C (68°F).
- The lowest overnight temperature recorded in April was 14°C (57°F) (April 18, 2017).
Best Places in the United States of America in April
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 April →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in Hilo in April
Comfortable temperatures call for an easy wardrobe in April. Pack summer basics like t-shirts and shorts, but include a light jacket for cooler moments. A pair of comfortable walking shoes is essential. It's going to pour! Pack a good poncho and prepare for very wet conditions. Bring sunglasses since you'll have some sunny periods throughout the monthWhat To Do in Hilo in April
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.
