May weather forecast and climate
Galena, AK

Weather in May

May, the last month of the spring, in Galena, is a fresh month, with temperature in the range of an average high of 53.2°F (11.8°C) and an average low of 35.8°F (2.1°C).

Temperature

In May, the average high-temperature significantly increases, from a subzero cold 31.1°F (-0.5°C) in April, to a cool 53.2°F (11.8°C). In Galena, the average low-temperature is 35.8°F (2.1°C).

Humidity

In May, the average relative humidity is 70%.

Rainfall

In May, in Galena, the rain falls for 16.7 days. Throughout May, 1.14" (29mm) of precipitation is accumulated. In Galena, during the entire year, the rain falls for 116.7 days and collects up to 14.8" (376mm) of precipitation.

Snowfall

January through May, September through December are months with snowfall. May is the last month it regularly snows in Galena, Alaska. During 4 snowfall days, in May, Galena aggregates 0.39" (10mm) of snow. In Galena, during the entire year, snow falls for 115.2 days, and aggregates up to 43.07" (1094mm) of snow.

Daylight

In Galena, the average length of the day in May is 18.8h.

Sunshine

May has the most sunshine of the year in Galena, with an average of 8.1h of sunshine.

UV index

Months with the highest UV index in Galena are May through July, with an average maximum UV index of 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from the exposure to the Sun's UV rays for ordinary individuals.
Note: In May, the average maximum UV index of 4 translate into the following recommendations:
Take precautions. Light skin individuals may get burned in less than 30 minutes. 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. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the temperature in May in Galena?

In May, in Galena, the average high-temperature is 53.2°F (11.8°C), and the average low-temperature is 35.8°F (2.1°C).

What is the average humidity in May in Galena?

In May, the average relative humidity is 70%.

How much does it rain in Galena in May?

In May, in Galena, Alaska, the rain falls for 16.7 days. Throughout May, 1.14" (29mm) of precipitation is accumulated.

What is the last month it snows in Galena?

May is the last month it regularly snows in Galena. During 4 snowfall days, in May, Galena aggregates 0.39" (10mm) of snow.

How many hours of daylight does Galena have in May?

The average length of the day in May in Galena is 18.8h.

What month has the most sunshine in Galena?

The month with the most sunshine is May, with an average of 8.1h of sunshine.

How long on average sun shines in May in Galena?

In May, the average sunshine in Galena, Alaska, is 8.1h.

What are the months with the highest UV index in Galena?

May through July, with an average maximum UV index of 4, are months with the highest UV index in Galena, Alaska.

How high is the UV index in May in Galena?

In Galena, Alaska, the average daily maximum UV index in May is 4. A UV Index of 3 to 5 symbolizes a medium hazard to health from unprotected exposure to the UV radiation.

Average temperature in May
Galena, AK

Average temperature in May - Galena, AK
  • Average high temperature in May: 53.2°F

The warmest month (with the highest average high temperature) is July (67.3°F).
The month with the lowest average high temperature is January (-0.8°F).

  • Average low temperature in May: 35.8°F

The month with the highest average low temperature is July (49.5°F).
The coldest month (with the lowest average low temperature) is January (-10.5°F).

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Average pressure in May
Galena, AK

Average pressure in May - Galena, AK
  • Average pressure in May: 29.91"

The month with the highest atmospheric pressure is February (29.93").
Months with the lowest atmospheric pressure are September and October (29.76").

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Average wind speed in May
Galena, AK

Average wind speed in May - Galena, AK
  • Average wind speed in May: 5mph

The windiest month (with the highest average wind speed) is September (5.2mph).
The calmest month (with the lowest average wind speed) is January (4.6mph).

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Average humidity in May
Galena, AK

Average humidity in May - Galena, AK
  • Average humidity in May: 70%

Months with the highest relative humidity are January, February and March (96%).
The month with the lowest relative humidity is June (59%).

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Average rainfall in May
Galena, AK

Average rainfall in May - Galena, AK
  • Average rainfall in May: 1.14"

The wettest month (with the highest rainfall) is August (2.05").
The driest month (with the least rainfall) is January (0.59").

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Average rainfall days in May
Galena, AK

Average rainfall days in May - Galena, AK
  • Average rainfall days in May: 16.7 days

The month with the highest number of rainy days is August (19 days).
Months with the least rainy days are January and February (2.3 days).

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Average snowfall in May
Galena, AK

Average snowfall in May - Galena, AK
  • Average snowfall in May: 0.39"

The month with the highest snowfall is December (8.62").
Months with the least snowfall are June, July and August (0").

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Average snowfall days in May
Galena, AK

Average snowfall days in May - Galena, AK
  • Average snowfall days in May: 4 days

The month with the highest number of snowfall days is March (20.3 days).
Months with the least snowfall days are June and July (0 days).

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Average daylight in May /
Average sunshine in May
Galena, AK

Average daylight in May / Average sunshine in May - Galena, AK
  • Average daylight in May: 18.8h

The month with the longest days is June (Average daylight: 21.4h).
The month with the shortest days is December (Average daylight: 4h).

  • Average sunshine in May: 8.1h

The month with the most sunshine is May (Average sunshine: 8.1h).
The month with the least sunshine is December (Average sunshine: 2.3h).

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Average sunshine days in May
Galena, AK

Average sunshine days in May - Galena, AK
  • Average sunshine days in May: 10.8 days

The month with the most sunshine days is January (18 days).
The month with the least sunshine days is April (6.5 days).

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Average UV index in May
Galena, AK

Average UV index in May - Galena, AK
  • Average UV index in May: 4

Months with the highest UV index are May, June and July (UV index 4).
Months with the lowest UV index are January, February, March, October, November and December (UV index 1).

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Average cloud cover in May
Galena, AK

Average cloud cover in May - Galena, AK
  • Average cloud cover in May: 56

The month with the most cloud cover is April (Cloud cover 77).
The month with the least cloud cover is June (Cloud cover 47).

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Average visibility in May
Galena, AK

Average visibility in May - Galena, AK
  • Average visibility in May: 5mi

Months with the highest visibility are June and July (6mi).
Months with the lowest visibility are January, February, March, April and December (2mi).

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