Contents
- Weather in May
- Frequently asked questions
- Average temperature in May
- Average pressure in May
- Average wind speed in May
- Average humidity in May
- Average rainfall in May
- Average rainfall days in May
- Average snowfall in May
- Average snowfall days in May
- Average sea temperature in May
- Average daylight in May
- Average sunshine in May
- Average sunshine days in May
- Average UV index in May
- Average cloud cover in May
- Average visibility in May
Weather in May
Temperature
As May sets, the average high-temperature shows a slight increase, moving up from a frosty 43.3°F (6.3°C) in April to a cool 51.6°F (10.9°C). Petersburg's nights in May cool down to an average low-temperature of 41.9°F (5.5°C).Humidity
The least humid month is May, with an average relative humidity of 81%.Rainfall
The month with the least rainfall is May, when the rain falls for 17.1 days and typically collects 2.01" (51mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. May is the last month it regularly snows. During 0.2 snowfall days, in May, Petersburg aggregates 0.12" (3mm) of snow. Throughout the year, there are 47.5 snowfall days, and 58.23" (1479mm) of snow is accumulated.Ocean temperature
In May, the average ocean temperature is 45.3°F (7.4°C).Note: Diving into 45.3°F (7.4°C) is practical below 50°F (10°C), given you're wearing protective swim gear; without it, expect a quick onset of cold shock and a struggle to breathe. Merely touching waters at 55.4°F (13°C) feels ice-cold.
Daylight
The average length of the day in May is 16h and 31min.On the first day of the month, sunrise is at 5:01 am and sunset at 8:35 pm. On the last day of May, sunrise is at 4:07 am and sunset at 9:31 pm AKDT.
Sunshine
With an average of 7.4h of sunshine, May has the most sunshine of the year.UV index
In Petersburg, the average daily maximum UV index in May is 3. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for ordinary individuals.Note: A typical high UV index of 3 in May suggests the following recommendations:
Take care. Persons with lighter skin might suffer burns in less than 30 minutes. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly. Take to heart! Snow reflection can almost magnify the Sun's UV radiation twofold.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Petersburg in May?
What is the least humid month?
What is the average humidity in May?
What is the driest month?
How many days does it rain in May?
What is the last month it snows?
What is the water temperature in May?
How many hours of daylight does Petersburg have in May?
When is the sunrise / sunset in May?
What month has the most sunshine?
How many hours of sunshine does Petersburg have in May?
How high is the UV index in May?
Average temperature in May
Petersburg, AK
- Average high temperature in May: 51.6°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 May: 41.9°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 May
Petersburg, AK
- Average pressure in May: 30"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 May
Petersburg, AK
- Average wind speed in May: 4.6mph
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 May
Petersburg, AK
- Average humidity in May: 81%
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 May
Petersburg, AK
- Average rainfall in May: 2.01"
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 May
Petersburg, AK
- Average rainfall days in May: 17.1 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 May
Petersburg, AK
- Average snowfall in May: 0.12"
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 May
Petersburg, AK
- Average snowfall days in May: 0.2 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 May
Petersburg, AK
- Average sea temperature in May: 45.4°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 May /
Average sunshine in May
Petersburg, AK
- Average daylight in May: 16h and 3min
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 May: 7h and 2min
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 May
Petersburg, AK
- Average sunshine days in May: 11.3 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 May
Petersburg, AK
- Average UV index in May: 3
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 May
Petersburg, AK
- Average cloud cover in May: 54
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 May
Petersburg, AK
- Average visibility in May: 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).
Petersburg, Alaska, USA
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