April weather forecastHanalei, HI
April
Weather in April
The weather in April holds a unique place in Hanalei's calendar as it fuses the onset of spring with the prelude to summer. The weather pattern from March continues, albeit with diminished rainfall levels. Headlining the month is the significant increase in daylight hours, up to 12.7, paving the way for more sun-soaked days. Besides elongated daylight hours, the rise in both land and sea temperatures promises a pre-summer warmth before the arrival of the hot May.Temperature
April's onset records an average high-temperature of a moderately hot 74.8°F (23.8°C), a near match to March's 73.2°F (22.9°C). Hanalei records a negligible downturn from daytime temperatures, averaging a low of 70.9°F (21.6°C) in the month of April.Humidity
In April, the average relative humidity in Hanalei is 76%.Rainfall
April is the month with the least rainfall. Rain falls for 18.3 days and accumulates 1.3" (33mm) of precipitation.Ocean temperature
January through April, with an average ocean temperature of 75.2°F (24°C), are months with the coldest seawater.Note: Factoring in a person's dislike for cold, combined with conditions like sunshine, wind, and temperature, a dip in 75.2°F (24°C) waters might be satisfying. (It is worth noting that the Olympic swimming waters are maintained between 77°F (25°C) and 82.4°F (28°C).)
Daylight
In Hanalei, the average length of the day in April is 12h and 41min.On the first day of April, sunrise is at 6:29 am and sunset at 6:53 pm. On the last day of the month, sunrise is at 6:05 am and sunset at 7:04 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 reading of 6 to 7 represents a high health hazard from unprotected exposure to Sun's UV rays for average individuals.Note: In April, a daily UV index of 6 turns into the following recommendations:
Refrain from overexposure. Fair-skinned individuals could burn in under 20 minutes. Attempt to stay under shade and limit exposure to the Sun between 10 a.m. and 4 p.m., when UV radiation is at its peak. Remember, devices such as parasols or canopies might not provide complete sun protection. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses. Attention! UV radiation is ramped up when reflecting off sand and water surfaces.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in April
Hanalei, HI
- Average high temperature in April: 74.8°F
The warmest month (with the highest average high temperature) is September (79.7°F).
The months with the lowest average high temperature are February and March (73.2°F).
- Average low temperature in April: 70.9°F
The month with the highest average low temperature is September (75.9°F).
The coldest month (with the lowest average low temperature) is February (68.5°F).
Average pressure in April
Hanalei, HI
- Average pressure in April: 30.07"Hg
The month with the highest atmospheric pressure is April (30.07"Hg).
The months with the lowest atmospheric pressure are September and October (29.98"Hg).
Average wind speed in April
Hanalei, HI
- Average wind speed in April: 11.5mph
The windiest month (with the highest average wind speed) is July (12.3mph).
The calmest month (with the lowest average wind speed) is January (10mph).
Average humidity in April
Hanalei, HI
- Average humidity in April: 76%
The months with the highest relative humidity are June, July, August, October and December (77%).
The month with the lowest relative humidity is January (75%).
Average rainfall in April
Hanalei, HI
- Average rainfall in April: 1.3"
The wettest month (with the highest rainfall) is March (2.52").
The driest month (with the least rainfall) is April (1.3").
Average rainfall days in April
Hanalei, HI
- Average rainfall days in April: 18.3 days
The month with the highest number of rainy days is August (21.1 days).
The month with the least rainy days is January (12.5 days).
Average sea temperature in April
Hanalei, HI
- Average sea temperature in April: 75°F
The best months for swimming (with the highest average sea temperature) are 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
Hanalei, HI
- Average daylight in April: 12h and 42min
The month with the longest days is June (Average daylight: 13h and 30min).
The month with the shortest days is December (Average daylight: 10h and 48min).
- Average sunshine in April: 7h and 48min
The month with the most sunshine is June (Average sunshine: 9h and 42min).
The month with the least sunshine is November (Average sunshine: 6h and 12min).
Average sunshine days in April
Hanalei, HI
- Average sunshine days in April: 5.7 days
The month with the most sunshine days is January (12.8 days).
The month with the least sunshine days is August (2.9 days).
Average UV index in April
Hanalei, 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
Hanalei, HI
- Average cloud cover in April: 46
The month with the most cloud cover is March (Cloud cover 47).
The months with the least cloud cover are January and September (Cloud cover 38).
Average visibility in April
Hanalei, 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).
