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 start of May signals a slight increase in the average high-temperature, moving from a cold 39.7°F (4.3°C) in April to a frosty 45.3°F (7.4°C). A steady low-temperature average of 41.5°F (5.3°C) is logged in Old Harbor during May, reflecting a modest dip from daytime readings.Humidity
The average relative humidity in May is 83%.Rainfall
In Old Harbor, in May, during 15.3 rainfall days, 2.72" (69mm) of precipitation is typically accumulated. Throughout the year, there are 171.2 rainfall days, and 37.32" (948mm) of precipitation is accumulated.Snowfall
January through May, September through December are months with snowfall in Old Harbor. May is the last month it regularly snows in Old Harbor. During 0.6 snowfall days, in May, Old Harbor aggregates 0.08" (2mm) of snow. Throughout the year, in Old Harbor, there are 35.1 snowfall days, and 13.74" (349mm) of snow is accumulated.Daylight
In Old Harbor, the average length of the day in May is 16h and 36min.On the first day of May in Old Harbor, sunrise is at 6:21 am and sunset at 9:58 pm. On the last day of the month, sunrise is at 5:26 am and sunset at 10:55 pm AKDT.
Sunshine
The average sunshine in May is 6.9h.UV index
In Old Harbor, Alaska, the average daily maximum UV index in May is 2. A UV Index estimate of 2, and below, represents a minimal health hazard from exposure to the Sun's UV rays for the ordinary person.Note: A typical high UV index of 2 in May suggests the following recommendations:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation. Observe! Snow reflection can nearly intensify the Sun's UV radiation twofold.
Frequently asked questions
What is the usual temperature for Old Harbor in May?
What is the average humidity in May in Old Harbor?
How many days does it rain in May in Old Harbor?
What is the last month it snows in Old Harbor?
What is the average length of the day in May in Old Harbor?
When are sunrise and sunset in May in Old Harbor?
How long on average sun shines in May in Old Harbor?
What is the UV index reading in May in Old Harbor?
Average temperature in May
Old Harbor, AK
- Average high temperature in May: 45.3°F
The warmest month (with the highest average high temperature) is August (57.6°F).
The month with the lowest average high temperature is January (35.4°F).
- Average low temperature in May: 41.5°F
The month with the highest average low temperature is August (50.7°F).
The coldest month (with the lowest average low temperature) is March (30.6°F).
Average pressure in May
Old Harbor, AK
- Average pressure in May: 29.89"Hg
The month with the highest atmospheric pressure is July (29.98"Hg).
The month with the lowest atmospheric pressure is December (29.55"Hg).
Average wind speed in May
Old Harbor, AK
- Average wind speed in May: 10.4mph
The windiest month (with the highest average wind speed) is December (14.2mph).
The calmest month (with the lowest average wind speed) is July (7.8mph).
Average humidity in May
Old Harbor, AK
- Average humidity in May: 83%
The month with the highest relative humidity is July (86%).
The months with the lowest relative humidity are March and November (80%).
Average rainfall in May
Old Harbor, AK
- Average rainfall in May: 2.72"
The wettest months (with the highest rainfall) are October and November (4.53").
The driest month (with the least rainfall) is July (1.85").
Average rainfall days in May
Old Harbor, AK
- Average rainfall days in May: 15.3 days
The month with the highest number of rainy days is September (17.6 days).
The month with the least rainy days is March (10.8 days).
Average snowfall in May
Old Harbor, AK
- Average snowfall in May: 0.08"
The month with the highest snowfall is March (3.15").
The months with the least snowfall are June, July and August (0").
Average snowfall days in May
Old Harbor, AK
- Average snowfall days in May: 0.6 days
The month with the highest number of snowfall days is March (8.5 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in May /
Average sunshine in May
Old Harbor, 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 48min).
- Average sunshine in May: 6h and 5min
The month with the most sunshine is July (Average sunshine: 8h and 18min).
The months with the least sunshine are January and December (Average sunshine: 2h and 36min).
Average sunshine days in May
Old Harbor, AK
- Average sunshine days in May: 13.5 days
The month with the most sunshine days is July (14.7 days).
The month with the least sunshine days is April (10.7 days).
Average UV index in May
Old Harbor, AK
- Average UV index in May: 2
The months with the highest UV index are June, July, August and September (UV index 3).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in May
Old Harbor, AK
- Average cloud cover in May: 62
The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is September (Cloud cover 52).
Average visibility in May
Old Harbor, 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).
Old Harbor, Alaska, USA
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