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 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
The beginning of May signals a minor rise in the average high-temperature, moving from an icy 37.8°F (3.2°C) in April to a chilly 46°F (7.8°C). In Port Heiden, nights during May observe an average temperature decrease to a wintry 37.9°F (3.3°C).Humidity
The least humid month is May, with an average relative humidity of 78%.Rainfall
In Port Heiden, in May, during 13.7 rainfall days, 0.87" (22mm) of precipitation is typically accumulated. Throughout the year, there are 160.7 rainfall days, and 16.57" (421mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, September through December. May is the last month it regularly snows. During 3.2 snowfall days, in May, Port Heiden aggregates 0.55" (14mm) of snow. Throughout the year, there are 83.4 snowfall days, and 23.94" (608mm) of snow is accumulated.Daylight
In May, the average length of the day in Port Heiden is 16h and 33min.On the first day of the month, sunrise is at 6:43 am and sunset at 10:19 pm. On the last day of May, sunrise is at 5:49 am and sunset at 11:15 pm AKDT.
Sunshine
May has the most sunshine of the year, with an average of 7.7h of sunshine.UV index
May through September, with an average maximum UV index of 3, are months with the highest UV index. A UV Index of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for ordinary individuals.Note: In May, the UV index of 3 transforms into the following advice:
Preventative actions are necessary - The mandate to avoid skin and eye damage is in place. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. Employ a hat with a wide brim for robust protection, cutting UV exposure by half. 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
What is the temperature in May?
What is the least humid month?
What is the average humidity in May in Port Heiden?
How many days does it rain in May?
What is the last month it snows?
What is the average length of the day in May?
When are sunrise and sunset in May?
What month has the most sunshine?
How long on average sun shines in May?
When is the highest UV index?
What is the UV index intensity in May?
Average temperature in May
Port Heiden, AK
- Average high temperature in May: 46°F
The warmest month (with the highest average high temperature) is August (56.8°F).
The month with the lowest average high temperature is January (28.9°F).
- Average low temperature in May: 37.9°F
The month with the highest average low temperature is August (49.1°F).
The coldest months (with the lowest average low temperature) are January and March (23.4°F).
Average pressure in May
Port Heiden, AK
- Average pressure in May: 29.86"Hg
The month with the highest atmospheric pressure is July (29.97"Hg).
The month with the lowest atmospheric pressure is December (29.54"Hg).
Average wind speed in May
Port Heiden, AK
- Average wind speed in May: 10.6mph
The windiest month (with the highest average wind speed) is December (14.8mph).
The calmest month (with the lowest average wind speed) is July (9.1mph).
Average humidity in May
Port Heiden, AK
- Average humidity in May: 78%
The month with the highest relative humidity is January (88%).
The month with the lowest relative humidity is May (78%).
Average rainfall in May
Port Heiden, AK
- Average rainfall in May: 0.87"
The wettest month (with the highest rainfall) is October (2.17").
The driest month (with the least rainfall) is June (0.83").
Average rainfall days in May
Port Heiden, AK
- Average rainfall days in May: 13.7 days
The month with the highest number of rainy days is September (19.2 days).
The month with the least rainy days is March (7.6 days).
Average snowfall in May
Port Heiden, AK
- Average snowfall in May: 0.55"
The month with the highest snowfall is December (5.71").
The months with the least snowfall are June, July and August (0").
Average snowfall days in May
Port Heiden, AK
- Average snowfall days in May: 3.2 days
The month with the highest number of snowfall days is December (15.1 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in May /
Average sunshine in May
Port Heiden, AK
- Average daylight in May: 16h and 4min
The month with the longest days is June (Average daylight: 17h and 48min).
The month with the shortest days is December (Average daylight: 6h and 54min).
- Average sunshine in May: 7h and 4min
The month with the most sunshine is May (Average sunshine: 7h and 42min).
The month with the least sunshine is December (Average sunshine: 2h and 24min).
Average sunshine days in May
Port Heiden, AK
- Average sunshine days in May: 13 days
The month with the most sunshine days is May (13 days).
The month with the least sunshine days is November (6 days).
Average UV index in May
Port Heiden, AK
- Average UV index in May: 3
The months with the highest UV index are May, June, July, August and September (UV index 3).
The months with the lowest UV index are February, March, November and December (UV index 1).
Average cloud cover in May
Port Heiden, AK
- Average cloud cover in May: 59
The month with the most cloud cover is July (Cloud cover 69).
The month with the least cloud cover is May (Cloud cover 59).
Average visibility in May
Port Heiden, AK
- Average visibility in May: 6mi
The months with the highest visibility are April, May, June, July, August, September and October (6mi).
The months with the lowest visibility are January, February, March, November and December (5mi).
Port Heiden, Alaska, USA
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