April weather forecastHilo, HI
April
Weather in April
April introduces a drop in rainfall to 1.97in from March's, indicating the onset of a drier period in Hilo. April’s weather makes it a promising time for outdoor activities such as hiking, watersports, and visiting the city's numerous natural attractions. The common breeze in Hilo delivers a pleasant coolness that complements the town’s coastal charm. Despite fewer rain showers, the city retains its rich green allure, reminding visitors and locals alike of Hilo's inherent verdancy. Sunsets over the scenic views in April offer extraordinarily photogenic moments.Temperature
Hilo sees the arrival of April with an average high-temperature of a still agreeable 70.9°F (21.6°C), indicating a subtle variation from March. A steady low-temperature average of 64.9°F (18.3°C) is logged during April, reflecting a modest dip from daytime readings.Humidity
The average relative humidity in April is 79%.Rainfall
In Hilo, Hawaii, in April, during 21.3 rainfall days, 1.97" (50mm) of precipitation is typically accumulated. Throughout the year, there are 227.7 rainfall days, and 27.83" (707mm) of precipitation is accumulated.Ocean temperature
In Hilo, Hawaii, the average seawater temperature in April is 76.3°F (24.6°C).Note: Swimming in 76.3°F (24.6°C) waters may not appeal to those sensitive to cold. Yet, the presence of sunshine, the strength of the wind, and the air temperature can alter this experience. Some might even opt for a wetsuit for added comfort.
Daylight
The average length of the day in April in Hilo, Hawaii, is 12h and 37min.On the first day of the month, sunrise is at 6:13 am and sunset at 6:34 pm. On the last day of April, in Hilo, sunrise is at 5:51 am and sunset at 6:43 pm HST.
Sunshine
In April, the average sunshine is 8.8h.UV index
The months with the lowest UV index in Hilo are January through April, with an average maximum UV index of 5. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for the average person.Note: An average UV index of 5 in April transforms into this advice:
Put precautions into practice - Ensuring skin and eye safety is a necessity. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance. Heads up! UV intensity is amplified by reflections from water and sand.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in April
Hilo, HI
- Average high temperature in April: 70.9°F
The warmest month (with the highest average high temperature) is August (75.4°F).
The month with the lowest average high temperature is March (69.6°F).
- Average low temperature in April: 64.9°F
The month with the highest average low temperature is September (70°F).
The coldest month (with the lowest average low temperature) is March (64°F).
Average pressure in April
Hilo, HI
- Average pressure in April: 30.05"Hg
The month with the highest atmospheric pressure is April (30.05"Hg).
The months with the lowest atmospheric pressure are September and October (29.97"Hg).
Average wind speed in April
Hilo, HI
- Average wind speed in April: 7.5mph
The windiest month (with the highest average wind speed) is August (7.6mph).
The calmest month (with the lowest average wind speed) is October (6.7mph).
Average humidity in April
Hilo, HI
- Average humidity in April: 79%
The month with the highest relative humidity is March (80%).
The months with the lowest relative humidity are January, May, June and July (78%).
Average rainfall in April
Hilo, HI
- Average rainfall in April: 1.97"
The wettest month (with the highest rainfall) is February (3.78").
The driest month (with the least rainfall) is June (1.1").
Average rainfall days in April
Hilo, HI
- Average rainfall days in April: 21.3 days
The month with the highest number of rainy days is March (22.9 days).
The month with the least rainy days is January (13.3 days).
Average sea temperature in April
Hilo, HI
- Average sea temperature in April: 76.3°F
The best month for swimming (with the highest average sea temperature) is September (79.3°F).
The coldest month (with the lowest average sea temperature) is March (75.7°F).
Average daylight in April /
Average sunshine in April
Hilo, HI
- Average daylight in April: 12h and 36min
The month with the longest days is June (Average daylight: 13h and 18min).
The month with the shortest days is December (Average daylight: 11h and 0min).
- Average sunshine in April: 8h and 48min
The month with the most sunshine is June (Average sunshine: 10h and 54min).
The month with the least sunshine is December (Average sunshine: 6h and 30min).
Average sunshine days in April
Hilo, HI
- Average sunshine days in April: 1.9 days
The month with the most sunshine days is January (12.1 days).
The month with the least sunshine days is August (1.8 days).
Average UV index in April
Hilo, HI
- Average UV index in April: 5
The months with the highest UV index are May, June, July, August, September, October, November and December (UV index 6).
The months with the lowest UV index are January, February, March and April (UV index 5).
Average cloud cover in April
Hilo, HI
- Average cloud cover in April: 38
The month with the most cloud cover is March (Cloud cover 42).
The month with the least cloud cover is January (Cloud cover 26).
Average visibility in April
Hilo, HI
- Average visibility in April: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
