May weather forecastPort Graham, AK
May
Weather in May
The last month of the spring, May, is a frosty month in Port Graham, Alaska, with an average temperature fluctuating between 40.6°F (4.8°C) and 46°F (7.8°C).Temperature
May's arrival sees a mild rise in the average high-temperature, transitioning from April's icy 38.3°F (3.5°C) to a frosty 46°F (7.8°C). Port Graham's nocturnal May readings average at a cold 40.6°F (4.8°C), showing little variation from the daytime temperatures.Humidity
The months with the lowest humidity are May and November, with an average relative humidity of 78%.Rainfall
In May, the rain falls for 17.7 days. Throughout May, 2.2" (56mm) of precipitation is accumulated. Throughout the year, there are 179.8 rainfall days, and 36.57" (929mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, September through December. May is the last month it regularly snows. During 0.6 snowfall days, in May, Port Graham aggregates 0.08" (2mm) of snow. In Port Graham, Alaska, during the entire year, snow falls for 70.1 days and aggregates up to 38.58" (980mm) of snow.Daylight
In May, the average length of the day is 17h and 4min.On the first day of the month, sunrise is at 6:05 am and sunset at 10:03 pm. On the last day of May, sunrise is at 5:02 am and sunset at 11:08 pm AKDT.
Sunshine
In Port Graham, the average sunshine in May is 8.4h.UV index
The months with the lowest UV index are January through May, October through December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a low threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: In May, a daily maximum UV index of 2 leads to the following instructions:
Despite the majority tolerating prolonged sun exposure, those with sensitive skin, infants, and children demand continual protection. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. Stay sun-safe with clothing that is both closely woven and worn loosely. Attention! Nearly twice the Sun's UV radiation can be reflected by snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Port Graham, AK
- Average high temperature in May: 46°F
The warmest months (with the highest average high temperature) are July and August (55.9°F).
The month with the lowest average high temperature is January (29.8°F).
- Average low temperature in May: 40.6°F
The month with the highest average low temperature is August (50.4°F).
The coldest month (with the lowest average low temperature) is January (25.9°F).
Average pressure in May
Port Graham, AK
- Average pressure in May: 29.91"Hg
The month with the highest atmospheric pressure is July (29.96"Hg).
The month with the lowest atmospheric pressure is December (29.6"Hg).
Average wind speed in May
Port Graham, AK
- Average wind speed in May: 7.4mph
The windiest month (with the highest average wind speed) is December (12.2mph).
The calmest month (with the lowest average wind speed) is June (6.2mph).
Average humidity in May
Port Graham, AK
- Average humidity in May: 78%
The months with the highest relative humidity are July and August (84%).
The months with the lowest relative humidity are May and November (78%).
Average rainfall in May
Port Graham, AK
- Average rainfall in May: 2.2"
The wettest month (with the highest rainfall) is December (5.2").
The driest month (with the least rainfall) is June (1.38").
Average rainfall days in May
Port Graham, AK
- Average rainfall days in May: 17.7 days
The month with the highest number of rainy days is September (18.8 days).
The month with the least rainy days is February (9 days).
Average snowfall in May
Port Graham, AK
- Average snowfall in May: 0.08"
The month with the highest snowfall is February (8.98").
The months with the least snowfall are June, July and August (0").
Average snowfall days in May
Port Graham, AK
- Average snowfall days in May: 0.6 days
The month with the highest number of snowfall days is February (13.3 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in May /
Average sunshine in May
Port Graham, AK
- Average daylight in May: 17h and 6min
The month with the longest days is June (Average daylight: 18h and 30min).
The month with the shortest days is December (Average daylight: 6h and 12min).
- Average sunshine in May: 8h and 24min
The month with the most sunshine is July (Average sunshine: 8h and 54min).
The month with the least sunshine is December (Average sunshine: 2h and 30min).
Average sunshine days in May
Port Graham, AK
- Average sunshine days in May: 12.1 days
The month with the most sunshine days is July (13.7 days).
The month with the least sunshine days is December (7.5 days).
Average UV index in May
Port Graham, AK
- Average UV index in May: 2
The month with the highest UV index is July (UV index 4).
The months with the lowest UV index are January, February, March, April, May, October, November and December (UV index 2).
Average cloud cover in May
Port Graham, AK
- Average cloud cover in May: 54
The month with the most cloud cover is December (Cloud cover 64).
The month with the least cloud cover is July (Cloud cover 51).
Average visibility in May
Port Graham, AK
- Average visibility in May: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
