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 snowfall in April
- Average snowfall 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
Shifting into April, Unalaska records an average high-temperature of a still icy 37.4°F (3°C), presenting minor fluctuations compared to the previous month. Unalaska documents an average low-temperature of 33.4°F (0.8°C) for the nights of April.Humidity
In April, the average relative humidity is 84%.Rainfall
In Unalaska, in April, it is raining for 15.8 days, with typically 2.44" (62mm) of accumulated precipitation. Throughout the year, there are 198.8 rainfall days, and 33.78" (858mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall. In Unalaska, in April, during 12.2 snowfall days, 4.09" (104mm) of snow is typically accumulated. Throughout the year, there are 78.3 snowfall days, and 30.39" (772mm) of snow is accumulated.Ocean temperature
In April, the average ocean temperature is 39°F (3.9°C).Note: In swimming situations, the extreme cold and danger can lead to fatality. Without the protection of insulated waterproof gear, hypothermia takes effect quickly.
Daylight
In Unalaska, the average length of the day in April is 14h and 6min.On the first day of the month, sunrise is at 8:36 am and sunset at 9:43 pm. On the last day of April, sunrise is at 7:29 am and sunset at 10:36 pm AKDT.
Sunshine
In Unalaska, the average sunshine in April is 4.4h.UV index
The months with the lowest UV index are February through April and November, with an average maximum UV index of 1. A UV Index of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV rays for the average person.Note: A maximum UV index of 1 in April translates into the following recommendations:
Although the majority can endure up to an hour in the sun without burns, children always require sun protection. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat. Take into account! The reflection from snow can nearly double the Sun's UV radiation intensity.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in April?
What is the average humidity in April?
How many days does it rain in April in Unalaska?
How many days does it snow in April?
What is the ocean temperature in April?
How many hours of daylight does Unalaska have in April?
What time are sunrise and sunset in April?
How long on average sun shines in April?
What is the month with the lowest UV index?
What is the UV index intensity in April?
Average temperature in April
Unalaska, AK
- Average high temperature in April: 37.4°F
The warmest month (with the highest average high temperature) is August (53.2°F).
The month with the lowest average high temperature is March (34.7°F).
- Average low temperature in April: 33.4°F
The month with the highest average low temperature is August (49.6°F).
The coldest month (with the lowest average low temperature) is March (30.7°F).
Average pressure in April
Unalaska, AK
- Average pressure in April: 29.72"Hg
The month with the highest atmospheric pressure is July (29.98"Hg).
The month with the lowest atmospheric pressure is January (29.5"Hg).
Average wind speed in April
Unalaska, AK
- Average wind speed in April: 14.4mph
The windiest months (with the highest average wind speed) are November and December (16.5mph).
The calmest month (with the lowest average wind speed) is July (9.1mph).
Average humidity in April
Unalaska, AK
- Average humidity in April: 84%
The month with the highest relative humidity is July (91%).
The months with the lowest relative humidity are November and December (80%).
Average rainfall in April
Unalaska, AK
- Average rainfall in April: 2.44"
The wettest month (with the highest rainfall) is December (4.21").
The driest month (with the least rainfall) is July (1.85").
Average rainfall days in April
Unalaska, AK
- Average rainfall days in April: 15.8 days
The month with the highest number of rainy days is October (21.8 days).
The month with the least rainy days is February (11.1 days).
Average snowfall in April
Unalaska, AK
- Average snowfall in April: 4.09"
The month with the highest snowfall is January (6.97").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in April
Unalaska, AK
- Average snowfall days in April: 12.2 days
The month with the highest number of snowfall days is January (14.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average sea temperature in April
Unalaska, AK
- Average sea temperature in April: 39°F
The best month for swimming (with the highest average sea temperature) is August (50.1°F).
The coldest month (with the lowest average sea temperature) is February (38.8°F).
Average daylight in April /
Average sunshine in April
Unalaska, AK
- Average daylight in April: 14h and 1min
The month with the longest days is June (Average daylight: 17h and 0min).
The month with the shortest days is December (Average daylight: 7h and 30min).
- Average sunshine in April: 4h and 2min
The month with the most sunshine is June (Average sunshine: 5h and 48min).
The month with the least sunshine is December (Average sunshine: 2h and 0min).
Average sunshine days in April
Unalaska, AK
- Average sunshine days in April: 3.8 days
The month with the most sunshine days is August (9.7 days).
The month with the least sunshine days is April (3.8 days).
Average UV index in April
Unalaska, AK
- Average UV index in April: 1
The months with the highest UV index are July and August (UV index 3).
The months with the lowest UV index are February, March, April and November (UV index 1).
Average cloud cover in April
Unalaska, AK
- Average cloud cover in April: 73
The month with the most cloud cover is July (Cloud cover 74).
The months with the least cloud cover are September and October (Cloud cover 66).
Average visibility in April
Unalaska, AK
- Average visibility in April: 5mi
The months with the highest visibility are May, June, August, September, October and November (6mi).
The months with the lowest visibility are January, February, March, April, July and December (5mi).
Unalaska, Alaska, USA
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