Hilo, Hawaii weather in April
Temperature, sea and sunshine in April: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in April
Good
Best time to visit: January – December
What is the weather like in Hilo, Hawaii in April?
In April, Hilo, Hawaii is warm: daytime highs average 24 °C, and nights cool down to about 20 °C. The sea averages 24.4 °C – pleasant for swimming. The sun shines for around 8 hours a day. It is the rainy season: rain falls on about 23 days, totalling 123 mm. The air is often humid and muggy. All in all, April is a good month for a holiday in Hilo, Hawaii.
April compared
How the weather changes from March to May. Tap a month to open it.
More details for April
- Daylight
- 12 h 35 min06:03 – 18:38
- UV index
- 12 · extremeclear sky, noon (estimate)All months
- Muggy days
- 15 daysdew point 18 °C or moreAll months
- Wind
- 18 km/haverage daily peakAll months
- Cloud cover
- 65 %on averageAll months
- Hot days
- 0 days30 °C or moreAll months
- Time zone
- UTC−10Pacific/Honolulu
How the score comes together
- Temperatureweight 50 %100 %
- Sunshineweight 20 %77 %
- Few rainy daysweight 30 %0 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Nature escape”.
What to pack in April
- Swimwear
- Sunscreen
- Sunglasses & sun hat
- Insect repellent
- Rain jacket or umbrella
Hilo, Hawaii in April: quick answers
Is Hilo, Hawaii hot in April?
Warm rather than hot: in April, daytime highs in Hilo, Hawaii average 24 °C and nights cool to about 20 °C.
Can you swim in Hilo, Hawaii in April?
Yes. In April the sea averages 24.4 °C – pleasant for swimming.
Does it rain much in Hilo, Hawaii in April?
It rains often – on about 23 days, adding up to 123 mm.
Hilo, Hawaii month by month
The whole year in Hilo, HawaiiAll destinations: USAHawaii weather in AprilWhere to go in AprilSea temperature in April
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences