May weather forecast and climate
Old Harbor, AK

Weather in May

May, the last month of the spring, in Old Harbor, is a chilly month, with average temperature varying between 41.5°F (5.3°C) and 45.3°F (7.4°C).

Temperature

In Old Harbor, Alaska, the average high-temperature in May marginally rises, from a cold 39.7°F (4.3°C) in April, to a frosty 45.3°F (7.4°C). In May, in Old Harbor, Alaska, the average low-temperature is 41.5°F (5.3°C).

Humidity

In Old Harbor, the average relative humidity is 83%.

Rainfall

In Old Harbor, during May, the rain falls for 15.3 days and regularly aggregates up to 2.72" (69mm) of precipitation. Throughout the year, in Old Harbor, there are 171.2 rainfall days, and 37.32" (948mm) 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, Old Harbor aggregates 0.08" (2mm) of snow. In Old Harbor, during the entire year, snow falls for 35.1 days, and aggregates up to 13.74" (349mm) of snow.

Daylight

In Old Harbor, Alaska, the average length of the day is 16.6h.

Sunshine

The average sunshine in May is 6.9h.

UV index

The average daily maximum UV index is 2. A UV Index of 2, and less, symbolizes a low health risk from the exposure to the Sun's UV rays for ordinary individuals.
Note: The daily maximum UV index of 2 interpret into the following advice:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the temperature in May in Old Harbor?

The average high-temperature, in May, in Old Harbor, is 45.3°F (7.4°C), while the average low-temperature is 41.5°F (5.3°C).

What is the average humidity in May in Old Harbor?

The average relative humidity in May is 83%.

How much does it rain in Old Harbor in May?

In May, the rain falls for 15.3 days. Throughout May, 2.72" (69mm) of precipitation is accumulated.

What is the last month it snows in Old Harbor?

May is the last month it regularly snows in Old Harbor, Alaska. During 0.6 snowfall days, in May, Old Harbor aggregates 0.08" (2mm) of snow.

What is the average length of the day in May in Old Harbor?

In May, the average length of the day in Old Harbor is 16.6h.

How long on average sun shines in May in Old Harbor?

The average sunshine in May in Old Harbor, Alaska, is 6.9h.

What is the UV index intensity in May in Old Harbor?

The average daily maximum UV index in May is 2. A UV Index reading of 2, and below, represents a low health risk from the exposure to the Sun's UV radiation.

Average temperature in May
Old Harbor, AK

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).

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Average pressure in May
Old Harbor, AK

Average pressure in May - Old Harbor, AK
  • Average pressure in May: 29.89"

The month with the highest atmospheric pressure is July (29.98").
The month with the lowest atmospheric pressure is December (29.55").

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Average wind speed in May
Old Harbor, AK

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).

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Average humidity in May
Old Harbor, AK

Average humidity in May - Old Harbor, AK
  • Average humidity in May: 83%

The month with the highest relative humidity is July (86%).
Months with the lowest relative humidity are March and November (80%).

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Average rainfall in May
Old Harbor, AK

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").

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Average rainfall days in May
Old Harbor, AK

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).

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Average snowfall in May
Old Harbor, AK

Average snowfall in May - Old Harbor, AK
  • Average snowfall in May: 0.08"

The month with the highest snowfall is March (3.15").
Months with the least snowfall are June, July and August (0").

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Average snowfall days in May
Old Harbor, AK

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).
Months with the least snowfall days are June, July and August (0 days).

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Average daylight in May /
Average sunshine in May
Old Harbor, AK

Average daylight in May / Average sunshine in May - Old Harbor, AK
  • Average daylight in May: 16.6h

The month with the longest days is June (Average daylight: 17.8h).
The month with the shortest days is December (Average daylight: 6.8h).

  • Average sunshine in May: 6.9h

The month with the most sunshine is July (Average sunshine: 8.3h).
Months with the least sunshine are January and December (Average sunshine: 2.6).

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Average sunshine days in May
Old Harbor, AK

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).

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Average UV index in May
Old Harbor, AK

Average UV index in May - Old Harbor, AK
  • Average UV index in May: 2

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).

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Average cloud cover in May
Old Harbor, AK

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).

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Average visibility in May
Old Harbor, AK

Average visibility in May - Old Harbor, AK
  • Average visibility in May: 6mi

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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