May weather forecastSaint John Harbor, AK
May
Weather in May
May, the last month of the spring in Saint John Harbor, is a fresh month, with an average temperature varying between 51.6°F (10.9°C) and 41.9°F (5.5°C).Temperature
May witnesses a subtle temperature ascent, adjusting from a frosty 43.3°F (6.3°C) in April to a fresh 51.6°F (10.9°C). During May, Saint John Harbor consistently records a temperature low averaging a cold 41.9°F (5.5°C).Humidity
With an average relative humidity of 81%, May is the least humid month.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
Months with snowfall are January through May, October through December. May is the last month it regularly snows. During 0.2 snowfall days, in May, Saint John Harbor aggregates 0.12" (3mm) of snow. Throughout the year, there are 47.5 snowfall days, and 58.23" (1479mm) of snow is accumulated.Daylight
In May, the average length of the day is 16h and 27min.On the first day of the month, sunrise is at 5:03 am and sunset at 8:34 pm. On the last day of May, in Saint John Harbor, sunrise is at 4:10 am and sunset at 9:28 pm AKDT.
Sunshine
The month with the most sunshine is May, with an average of 7.4h of sunshine.UV index
The average daily maximum UV index in May is 3. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for the ordinary person.Note: The daily maximum UV index of 3 in May interprets into the following advice:
Prioritize safety - Suggestions to prevent sun damage are offered. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. Tightly woven clothing, when worn loosely, shields effectively against the Sun. Note this! The Sun's UV radiation can nearly be doubled by the reflection off snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Saint John Harbor, 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
Saint John Harbor, 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
Saint John Harbor, 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
Saint John Harbor, 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
Saint John Harbor, 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
Saint John Harbor, 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
Saint John Harbor, 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
Saint John Harbor, 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 daylight in May /
Average sunshine in May
Saint John Harbor, AK
- Average daylight in May: 16h and 30min
The month with the longest days is June (Average daylight: 17h and 36min).
The month with the shortest days is December (Average daylight: 7h and 0min).
- Average sunshine in May: 7h and 24min
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
Saint John Harbor, 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
Saint John Harbor, 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
Saint John Harbor, 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
Saint John Harbor, 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).
