April weather forecastPetersburg, AK
April
Weather in April
April witnesses a significant transition in weather patterns in Petersburg. The blend of temperatures shifting towards warmth, coupled with the decreasing snowfall, points towards the advent of a unique spring season. Humidity levels and daylight hours rise, making outdoor activities more feasible. April brings with it an appreciable decrease in pressure, standing at 29.93" (760mm). This month acts as an introduction to the much-awaited sunny period, with a marked shift in the weather by May.Temperature
With the onset of April, Petersburg observes a minor temperature ascent, with the average high-temperature adjusting from March's icy 36.9°F (2.7°C) to a chilly 43.3°F (6.3°C). April nights witness a slight temperature decrease, averaging at an icy 34.3°F (1.3°C).Humidity
The average relative humidity in April is 83%.Rainfall
In Petersburg, during April, the rain falls for 18.1 days and regularly aggregates up to 3.54" (90mm) of precipitation. In Petersburg, during the entire year, the rain falls for 197.9 days and collects up to 53.03" (1347mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. In Petersburg, in April, snow falls for 3.8 days, with typically accumulated 2.6" (66mm) of snow. In Petersburg, during the entire year, snow falls for 47.5 days and aggregates up to 58.23" (1479mm) of snow.Ocean temperature
In April, the average ocean temperature in Petersburg is 42.4°F (5.8°C).Note: It is life-risking to swim in 42.4°F (5.8°C). Briefly staying in 55.4°F (13°C) waters feels unsettling, and temperatures below 50°F (10°C) might result in cold shock and loss of breath control, hinging on personal endurance.
Daylight
In April, the average length of the day is 14h and 20min.On the first day of April, sunrise is at 6:18 am and sunset at 7:32 pm. On the last day of the month, sunrise is at 5:04 am and sunset at 8:33 pm AKDT.
Sunshine
In Petersburg, the average sunshine in April is 6.7h.UV index
In April, the average daily maximum UV index is 2. A UV Index reading of 2, and below, represents a low health risk from exposure to the Sun's UV rays for average individuals.Note: The daily high UV index of 2 in April translates into this advice:
Protection from prolonged sun exposure is necessary for babies, children, and individuals with sensitive skin. The Sun's radiation is especially intense around midday; try to stay in shade during this period. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days. Take precaution! The reflection from snow can almost double the UV radiation of the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
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).
Average pressure in April
Petersburg, AK
- Average pressure in April: 29.93"Hg
The month with the highest atmospheric pressure is July (30.05"Hg).
The month with the lowest atmospheric pressure is November (29.8"Hg).
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).
Average humidity in April
Petersburg, AK
- Average humidity in April: 83%
The months with the highest relative humidity are January and August (86%).
The month with the lowest relative humidity is May (81%).
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").
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).
Average snowfall in April
Petersburg, AK
- Average snowfall in April: 2.6"
The month with the highest snowfall is March (13.46").
The months with the least snowfall are June, July, August and September (0").
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).
The months with the least snowfall days are June, July, August and September (0 days).
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).
Average daylight in April /
Average sunshine in April
Petersburg, AK
- Average daylight in April: 14h and 18min
The month with the longest days is June (Average daylight: 17h and 42min).
The month with the shortest days is December (Average daylight: 6h and 54min).
- Average sunshine in April: 6h and 42min
The month with the most sunshine is May (Average sunshine: 7h and 24min).
The months with the least sunshine are January and November (Average sunshine: 3h and 24min).
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).
Average UV index in April
Petersburg, 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 November and December (UV index 1).
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).
The months with the least cloud cover are February and May (Cloud cover 54).
Average visibility in April
Petersburg, 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).
