Contents
- Weather in April
- Frequently asked questions
- Average temperature in April
- Average pressure in April
- Average wind speed in April
- Average humidity in April
- Average rainfall in April
- Average rainfall days in April
- Average sea temperature in April
- Average daylight in April
- Average sunshine in April
- Average sunshine days in April
- Average UV index in April
- Average cloud cover in April
- Average visibility in April
Weather in April
Temperature
April's beginning signals an average high-temperature of a still warm 76.8°F (24.9°C), barely different from March's 75.4°F (24.1°C). In April, Waimalu experiences a marginal drop in temperature, with averages of 70.7°F (21.5°C) at night.Humidity
The months with the lowest humidity are April through June and September, with an average relative humidity of 74%.Rainfall
In Waimalu, during April, the rain falls for 18.6 days and regularly aggregates up to 1.22" (31mm) of precipitation. Throughout the year, there are 208.4 rainfall days, and 16.5" (419mm) of precipitation is accumulated.Ocean temperature
January through April, with an average ocean temperature of 75.2°F (24°C), are months with the coldest seawater.Note: The allure of a swim in 75.2°F (24°C) waters can be influenced by your feelings towards the cold, today's sunshine, the wind's touch, and the ambient warmth. To put it in perspective, Olympic standards demand water temperatures of 77°F (25°C) to 82.4°F (28°C).
Daylight
In April, the average length of the day is 12h and 40min.On the first day of the month, sunrise is at 6:23 am and sunset at 6:46 pm. On the last day of April, sunrise is at 6:00 am and sunset at 6:57 pm HST.
Sunshine
In April, the average sunshine is 7.8h.UV index
The months with the lowest UV index are January through August, October through December, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV rays for ordinary individuals.Note: The maximum UV index, 6 during April, leads to the following recommendations:
Guard oneself from overexposure. Defence against sun injury is vital. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. Boost your sun resistance with garments that are densely woven yet spacious. Be wary! Reflections from sand and water make UV radiation more intense.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in April?
What are the least humid months?
What is the average humidity in April?
How much does it rain in Waimalu in April?
When is the ocean coldest?
What is the ocean temperature in April?
What is the average length of the day in April?
What time are sunrise and sunset in April?
How long on average sun shines in April?
When is the lowest UV index?
How high is the UV index in April?
Average temperature in April
Waimalu, HI
- Average high temperature in April: 76.8°F
The warmest months (with the highest average high temperature) are August and September (82°F).
The months with the lowest average high temperature are February and March (75.4°F).
- Average low temperature in April: 70.7°F
The month with the highest average low temperature is September (75°F).
The coldest month (with the lowest average low temperature) is February (68°F).
Average pressure in April
Waimalu, HI
- Average pressure in April: 30.06"Hg
The month with the highest atmospheric pressure is April (30.06"Hg).
The months with the lowest atmospheric pressure are September and October (29.97"Hg).
Average wind speed in April
Waimalu, HI
- Average wind speed in April: 10.4mph
The windiest month (with the highest average wind speed) is July (11.3mph).
The calmest month (with the lowest average wind speed) is January (8.4mph).
Average humidity in April
Waimalu, HI
- Average humidity in April: 74%
The months with the highest relative humidity are February and December (76%).
The months with the lowest relative humidity are April, May, June and September (74%).
Average rainfall in April
Waimalu, HI
- Average rainfall in April: 1.22"
The wettest month (with the highest rainfall) is October (2.09").
The driest month (with the least rainfall) is July (0.71").
Average rainfall days in April
Waimalu, HI
- Average rainfall days in April: 18.6 days
The month with the highest number of rainy days is March (20 days).
The month with the least rainy days is January (13.5 days).
Average sea temperature in April
Waimalu, HI
- Average sea temperature in April: 75°F
The best months for swimming (with the highest average sea temperature) are August, September and October (81°F).
The coldest months (with the lowest average sea temperature) are January, February, March and April (75°F).
Average daylight in April /
Average sunshine in April
Waimalu, HI
- Average daylight in April: 12h and 4min
The month with the longest days is June (Average daylight: 13h and 24min).
The month with the shortest days is December (Average daylight: 10h and 54min).
- Average sunshine in April: 7h and 5min
The month with the most sunshine is June (Average sunshine: 9h and 54min).
The months with the least sunshine are November and December (Average sunshine: 6h and 18min).
Average sunshine days in April
Waimalu, HI
- Average sunshine days in April: 7.7 days
The month with the most sunshine days is January (12.3 days).
The month with the least sunshine days is November (6.2 days).
Average UV index in April
Waimalu, HI
- Average UV index in April: 6
The month with the highest UV index is September (UV index 7).
The months with the lowest UV index are January, February, March, April, May, June, July, August, October, November and December (UV index 6).
Average cloud cover in April
Waimalu, HI
- Average cloud cover in April: 43
The month with the most cloud cover is March (Cloud cover 44).
The month with the least cloud cover is January (Cloud cover 36).
Average visibility in April
Waimalu, 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).
Waimalu, Hawaii, USA
Weather forecast for your location
2. Allow the app to use your location