April weather forecast
Ketchikan, AK

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Beautiful and colorful houses along the waterfront boardwalk on Creek Street in Ketchikan, Alaska
Beautiful and colorful houses along the waterfront boardwalk on Creek Street in Ketchikan, Alaska

Weather in April

In April, Ketchikan begins to experience a taste of spring, with warmer temperatures and longer daylight hours. Average temperatures remain within 37.2°F (2.9°C) on the cooler side and ascend to 46°F (7.8°C). Interestingly, snowfall sharply decreases to approximately 1.1" (28mm), marking the conclusion of the prominent snow season. The extended daylight duration of 14.2 hours permits increased outdoor activities. Owing to these factors, April marks the commencement of an enjoyable period in Ketchikan.

Temperature

With the onset of April, Ketchikan's weather sees a minor temperature rise, transitioning from an icy 40.3°F (4.6°C) in March to a chilly 46°F (7.8°C). Ketchikan's April nights demonstrate minimal variation from the daytime temperatures, with an average of 37.2°F (2.9°C).

Humidity

In Ketchikan, the average relative humidity in April is 83%.

Rainfall

In Ketchikan, Alaska, during April, the rain falls for 20.7 days and regularly aggregates up to 6.22" (158mm) of precipitation. Throughout the year, in Ketchikan, there are 221.8 rainfall days, and 80" (2032mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Ketchikan are January through May, November and December. In Ketchikan, in April, snow falls for 2.5 days, with typically accumulated 1.1" (28mm) of snow. In Ketchikan, during the entire year, snow falls for 40.7 days and aggregates up to 48.35" (1228mm) of snow.

Ocean temperature

In Ketchikan, in April, the average water temperature is 44.2°F (6.8°C).
Note: Swimming in 44.2°F (6.8°C) at temperatures under 50°F (10°C) requires thermal swimsuits; otherwise, one can face cold shock and breathing difficulty. Even brief immersion at 55.4°F (13°C) feels frosty.

Daylight

The average length of the day in April is 14h and 13min.
On the first day of April in Ketchikan, sunrise is at 6:15 am and sunset at 7:25 pm. On the last day of the month, sunrise is at 5:04 am and sunset at 8:22 pm AKDT.

Sunshine

In Ketchikan, the average sunshine in April is 6.1h.

UV index

The average daily maximum UV index in April in Ketchikan is 2. A UV Index of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV radiation for the ordinary person.
Note: In April, the maximum UV index of 2 transforms into these recommendations:
While most individuals can withstand prolonged sun exposure, it is imperative that babies, children, and those with sensitive skin always be shielded. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. Boost your sun resistance with garments that are densely woven yet spacious. Take note! UV radiation from the Sun can double in intensity due to snow reflection.
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Frequently asked questions

What are April temperatures in Ketchikan?

During April, Ketchikan experiences an average high-temperature of 46°F (7.8°C) and a low-temperature of 37.2°F (2.9°C).

What is the average humidity in April in Ketchikan?

In April, the average relative humidity in Ketchikan is 83%.

How many days does it rain in April in Ketchikan?

In Ketchikan, Alaska, in April, during 20.7 rainfall days, 6.22" (158mm) of precipitation is typically accumulated.

How many days does it snow in April in Ketchikan?

In April, in Ketchikan, it is snowing for 2.5 days. Throughout April, 1.1" (28mm) of snow is accumulated.

What is the ocean temperature in April in Ketchikan?

In April, the average ocean temperature in Ketchikan, Alaska, is 44.2°F (6.8°C). Swimming in 44.2°F (6.8°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

How many hours of daylight does Ketchikan have in April?

In April, the average day length in Ketchikan is 14h and 13min.

When is the sunrise / sunset in April in Ketchikan?

On the first day of April in Ketchikan, Alaska, sunrise is at 6:15 am and sunset at 7:25 pm. On the last day of the month, sunrise is at 5:04 am and sunset at 8:22 pm AKDT.

How many hours of sunshine does Ketchikan have in April?

The average sunshine duration in April is 6.1h.

What is the UV index intensity in April in Ketchikan?

The average daily maximum UV index in April is 2. A UV Index estimate of 2, and below, represents a minimal health vulnerability from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in April
Ketchikan, AK

Average temperature in April - Ketchikan, AK
  • Average high temperature in April: 46°F

The warmest months (with the highest average high temperature) are July and August (60.8°F).
The month with the lowest average high temperature is December (35.8°F).

  • Average low temperature in April: 37.2°F

The month with the highest average low temperature is August (52°F).
The coldest month (with the lowest average low temperature) is February (30.6°F).

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Average pressure in April
Ketchikan, AK

Average pressure in April - Ketchikan, AK
  • Average pressure in April: 29.94"Hg

The month with the highest atmospheric pressure is July (30.06"Hg).
The month with the lowest atmospheric pressure is November (29.8"Hg).

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Average wind speed in April
Ketchikan, AK

Average wind speed in April - Ketchikan, AK
  • Average wind speed in April: 6.9mph

The windiest month (with the highest average wind speed) is January (8.7mph).
The calmest months (with the lowest average wind speed) are July and August (5.3mph).

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Average humidity in April
Ketchikan, AK

Average humidity in April - Ketchikan, AK
  • Average humidity in April: 83%

The month with the highest relative humidity is January (88%).
The month with the lowest relative humidity is May (82%).

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Average rainfall in April
Ketchikan, AK

Average rainfall in April - Ketchikan, AK
  • Average rainfall in April: 6.22"

The wettest month (with the highest rainfall) is January (9.69").
The driest month (with the least rainfall) is May (3.46").

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Average rainfall days in April
Ketchikan, AK

Average rainfall days in April - Ketchikan, AK
  • Average rainfall days in April: 20.7 days

The month with the highest number of rainy days is November (21.4 days).
The month with the least rainy days is February (14.2 days).

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Average snowfall in April
Ketchikan, AK

Average snowfall in April - Ketchikan, AK
  • Average snowfall in April: 1.1"

The month with the highest snowfall is February (13.11").
The months with the least snowfall are June, July, August, September and October (0").

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Average snowfall days in April
Ketchikan, AK

Average snowfall days in April - Ketchikan, AK
  • Average snowfall days in April: 2.5 days

The month with the highest number of snowfall days is March (10.8 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average sea temperature in April
Ketchikan, AK

Average sea temperature in April - Ketchikan, AK
  • Average sea temperature in April: 44.1°F

The best month for swimming (with the highest average sea temperature) is August (55.9°F).
The coldest month (with the lowest average sea temperature) is March (42.5°F).

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Average daylight in April /
Average sunshine in April
Ketchikan, AK

Average daylight in April / Average sunshine in April - Ketchikan, AK
  • Average daylight in April: 14h and 1min

The month with the longest days is June (Average daylight: 17h and 24min).
The month with the shortest days is December (Average daylight: 7h and 12min).

  • Average sunshine in April: 6h and 1min

The month with the most sunshine is May (Average sunshine: 7h and 12min).
The month with the least sunshine is January (Average sunshine: 3h and 0min).

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Average sunshine days in April
Ketchikan, AK

Average sunshine days in April - Ketchikan, AK
  • Average sunshine days in April: 7.4 days

The month with the most sunshine days is July (11.9 days).
The month with the least sunshine days is November (5.6 days).

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Average UV index in April
Ketchikan, AK

Average UV index in April - Ketchikan, AK
  • Average UV index in April: 2

The months with the highest UV index are July and August (UV index 4).
The months with the lowest UV index are January, November and December (UV index 1).

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Average cloud cover in April
Ketchikan, AK

Average cloud cover in April - Ketchikan, AK
  • Average cloud cover in April: 61

The month with the most cloud cover is January (Cloud cover 71).
The month with the least cloud cover is May (Cloud cover 55).

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Average visibility in April
Ketchikan, AK

Average visibility in April - Ketchikan, AK
  • Average visibility in April: 6mi

The months with the highest visibility are February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are January, July and August (5mi).

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Ketchikan, Alaska, USA

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