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 Petersburg welcomes May, the average high-temperature sees a modest rise, transitioning from a frosty 43.3°F (6.3°C) in April to a cool 51.6°F (10.9°C). During May, Petersburg's temperature falls to a steady low-temperature average of 41.9°F (5.5°C).Humidity
With an average relative humidity of 81%, May is the least humid month.Rainfall
May is the month with the least rainfall in Petersburg. Rain falls for 17.1 days and accumulates 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. In Petersburg, Alaska, during the entire year, snow falls for 47.5 days and aggregates up to 58.23" (1479mm) of snow.Ocean temperature
In Petersburg, in May, the average water temperature is 45.3°F (7.4°C).Note: If planning to swim in 45.3°F (7.4°C) under 50°F (10°C), wear a protective suit. Neglecting this advice might cause immediate cold shock and troubled breathing. A splash around 55.4°F (13°C) is not much warmer.
Daylight
In Petersburg, 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, in Petersburg, sunrise is at 4:07 am and sunset at 9:31 pm AKDT.
Sunshine
May has the most sunshine of the year in Petersburg, with an average of 7.4h of sunshine.UV index
In May, the average daily maximum UV index in Petersburg is 3. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for average individuals.Note: In May, an average UV index of 3 transforms into the following instructions:
Act with care - Obligation to protect against skin and eye damage is highlighted. When the Sun is at its strongest around midday, find shade and limit exposure. Enhance your sun protection with tightly woven, yet airy clothing. Be informed! The Sun's UV radiation can be nearly doubled due to the reflection from snow.
Frequently asked questions
What is the average May temperature in Petersburg?
What is the least humid month in Petersburg?
What is the average humidity in May in Petersburg?
What is the driest month in Petersburg?
How much does it rain in Petersburg in May?
What is the last month it snows in Petersburg?
What is the water temperature in May in Petersburg?
How many hours of daylight does Petersburg have in May?
When is the sunrise / sunset in May in Petersburg?
What month has the most sunshine in Petersburg?
How long on average sun shines in May in Petersburg?
What is the UV index reading in May in Petersburg?
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
Weather forecast for your location
2. Allow the app to use your location
