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
Unalaska notes an average high-temperature of a still icy 37.4°F (3°C) in April, displaying minor variation from March. An average low-temperature of 33.4°F (0.8°C) is witnessed throughout the month of April, a mere drop from the daytime peak.Humidity
The average relative humidity in April is 84%.Rainfall
In Unalaska, in April, during 15.8 rainfall days, 2.44" (62mm) of precipitation is typically accumulated. In Unalaska, during the entire year, the rain falls for 198.8 days and collects up to 33.78" (858mm) of precipitation.Snowfall
Months with snowfall in Unalaska are January through May, October through December. In Unalaska, in April, during 12.2 snowfall days, 4.09" (104mm) of snow is typically accumulated. In Unalaska, during the entire year, snow falls for 78.3 days and aggregates up to 30.39" (772mm) of snow.Ocean temperature
In April, the average ocean temperature is 39°F (3.9°C).Note: During swimming sessions, this situation poses an instant life risk. The control of breathing is completely lost, hampering clear thinking. Wearing a specialized swimsuit is a necessity to prevent thermal loss.
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, in Unalaska, sunrise is at 7:29 am and sunset at 10:36 pm AKDT.
Sunshine
In April, the average sunshine in Unalaska is 4.4h.UV index
The months with the lowest UV index in Unalaska are February through April and November, with an average maximum UV index of 1. A UV Index of 2, and less, symbolizes a low health risk from unprotected exposure to Sun's UV rays for the ordinary person.Note: A typical high UV index of 1 in April suggests the following recommendations:
While sun exposure does not greatly affect most, individuals with fair skin, babies, and children always need vigilant safeguarding. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized. Notice this! Nearly double the intensity of the Sun's UV radiation can be caused by snow reflection.
Frequently asked questions
How cold is it in Unalaska in April?
What is the average humidity in April in Unalaska?
How many days does it rain in April in Unalaska?
How much does it snow in Unalaska in April?
What is the water temperature in April in Unalaska?
What is the average length of the day in April in Unalaska?
What time are sunrise and sunset in April in Unalaska?
How long on average sun shines in April in Unalaska?
What are the months with the lowest UV index in Unalaska?
How high is the UV index in April in Unalaska?
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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