April weather forecast and climate
Petersburg, AK

Colorful buildings, docked ships in Quaint fishing village in Petersburg, Alaska, on Mitkof Island
Colorful buildings, docked ships in Quaint fishing village in Petersburg, Alaska, on Mitkof Island

Weather in April

April in Petersburg, Alaska, is a frosty spring month, with average temperature ranging between min 34.3°F (1.3°C) and max 43.3°F (6.3°C).

Temperature

In April, the average high-temperature marginally rises, from a wintry 36.9°F (2.7°C) in March, to a chilly 43.3°F (6.3°C). In April, the average low-temperature is 34.3°F (1.3°C).

Humidity

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

Rainfall

In April, in Petersburg, the rain falls for 18.1 days. Throughout April, 3.54" (90mm) of precipitation is accumulated. Throughout the year, there are 197.9 rainfall days, and 53.03" (1347mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through May, October through December. In Petersburg, in April, snow falls for 3.8 days, with typically accumulated 2.6" (66mm) of snow. Throughout the year, in Petersburg, there are 47.5 snowfall days, and 58.23" (1479mm) of snow is accumulated.

Ocean temperature

In April, the average ocean temperature is 42.4°F (5.8°C).
Note: Swimming in 42.4°F (5.8°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

Daylight

The average length of the day in April is 14.4h.

Sunshine

The average sunshine in Petersburg is 6.7h.

UV index

The average daily maximum UV index in April is 2. A UV Index of 2, and less, symbolizes a minimal health hazard from unprotected exposure to the Sun's UV rays for ordinary individuals.
Note: The daily maximum UV index of 2 interpret into the following advice:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the average humidity in April in Petersburg?

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

How much does it rain in Petersburg in April?

In Petersburg, in April, it is raining for 18.1 days, with typically 3.54" (90mm) of accumulated precipitation.

How much does it snow in Petersburg in April?

In Petersburg, in April, during 3.8 snowfall days, 2.6" (66mm) of snow is typically accumulated.

What is the water temperature in April in Petersburg?

In April, the average ocean temperature in Petersburg, Alaska, is 42.4°F (5.8°C). Swimming in 42.4°F (5.8°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 Petersburg have in April?

The average length of the day in April in Petersburg is 14.4h.

How many hours of sunshine does Petersburg have in April?

In April, the average sunshine is 6.7h.

How high is the UV index in April in Petersburg?

In Petersburg, the average daily maximum UV index in April is 2. A UV Index reading of 2, and below, represents a low health threat from the exposure to the Sun's UV radiation.

Average temperature in April
Petersburg, AK

Average temperature in April - Petersburg, AK
  • Average high temperature in April: 43.3°F

The warmest month (with the highest average high temperature) is July (59.7°F).
The month with the lowest average high temperature is December (32.4°F).

  • Average low temperature in April: 34.3°F

The month with the highest average low temperature is July (50.2°F).
The coldest month (with the lowest average low temperature) is February (25.9°F).

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Average pressure in April
Petersburg, AK

Average pressure in April - Petersburg, AK
  • Average pressure in April: 29.93"

The month with the highest atmospheric pressure is July (30.05").
The month with the lowest atmospheric pressure is November (29.8").

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Average wind speed in April
Petersburg, AK

Average wind speed in April - Petersburg, AK
  • Average wind speed in April: 5.7mph

The windiest month (with the highest average wind speed) is January (8.2mph).
The calmest month (with the lowest average wind speed) is July (3.9mph).

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Average humidity in April
Petersburg, AK

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

Months with the highest relative humidity are January and August (86%).
The month with the lowest relative humidity is May (81%).

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Average rainfall in April
Petersburg, AK

Average rainfall in April - Petersburg, AK
  • Average rainfall in April: 3.54"

The wettest month (with the highest rainfall) is October (6.3").
The driest month (with the least rainfall) is May (2.01").

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Average rainfall days in April
Petersburg, AK

Average rainfall days in April - Petersburg, AK
  • Average rainfall days in April: 18.1 days

The month with the highest number of rainy days is October (20.1 days).
The month with the least rainy days is February (9.5 days).

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Average snowfall in April
Petersburg, AK

Average snowfall in April - Petersburg, AK
  • Average snowfall in April: 2.6"

The month with the highest snowfall is March (13.46").
Months with the least snowfall are June, July, August and September (0").

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Average snowfall days in April
Petersburg, AK

Average snowfall days in April - Petersburg, AK
  • Average snowfall days in April: 3.8 days

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

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Average sea temperature in April
Petersburg, AK

Average sea temperature in April - Petersburg, AK
  • Average sea temperature in April: 42.4°F

The best month for swimming (with the highest average sea temperature) is August (54.2°F).
The coldest month (with the lowest average sea temperature) is March (41°F).

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

Average daylight in April / Average sunshine in April - Petersburg, AK
  • Average daylight in April: 14.4h

The month with the longest days is June (Average daylight: 17.7h).
The month with the shortest days is December (Average daylight: 6.9h).

  • Average sunshine in April: 6.7h

The month with the most sunshine is May (Average sunshine: 7.4h).
Months with the least sunshine are January and November (Average sunshine: 3.4).

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Average sunshine days in April
Petersburg, AK

Average sunshine days in April - Petersburg, AK
  • Average sunshine days in April: 9.1 days

The month with the most sunshine days is December (12.5 days).
The month with the least sunshine days is November (8 days).

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Average UV index in April
Petersburg, AK

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

Months with the highest UV index are July and August (UV index 4).
Months with the lowest UV index are November and December (UV index 1).

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Average cloud cover in April
Petersburg, AK

Average cloud cover in April - Petersburg, AK
  • Average cloud cover in April: 58

The month with the most cloud cover is January (Cloud cover 66).
Months with the least cloud cover are February and May (Cloud cover 54).

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Average visibility in April
Petersburg, AK

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

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

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