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
May's onset brings a noticeable temperature rise, soaring from a subzero cold 31.1°F (-0.5°C) in April to a cool 53.2°F (11.8°C). In Galena, in May, the average low-temperature is an icy 35.8°F (2.1°C).Humidity
The average relative humidity in May is 70%.Rainfall
In Galena, in May, during 16.7 rainfall days, 1.14" (29mm) of precipitation is typically accumulated. Throughout the year, there are 116.7 rainfall days, and 14.8" (376mm) of precipitation is accumulated.Snowfall
January through May, September through December are months with snowfall. May is the last month it regularly snows. During 4 snowfall days, in May, Galena aggregates 0.39" (10mm) of snow. Throughout the year, there are 115.2 snowfall days, and 43.07" (1094mm) of snow is accumulated.Daylight
The average length of the day in May in Galena is 18h and 47min.On the first day of the month, sunrise is at 5:51 am and sunset at 10:58 pm. On the last day of May, sunrise is at 4:10 am and sunset at 12:40 am AKDT.
Sunshine
With an average of 8.1h of sunshine, May has the most sunshine of the year.UV index
May through July, with an average maximum UV index of 4, are months with the highest UV index. A UV Index of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The UV index of 4 in May translates into these instructions:
Undertake protective steps - Recommendations to avoid sunburn are issued. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. To cut down UV radiation exposure by about half, sport a wide-brim hat. Notice! The UV radiation of the Sun can be intensified nearly twofold due to the reflective quality of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Galena in May?
What is the average humidity in May?
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?
What time are sunrise and sunset in May?
What month has the most sunshine?
How many hours of sunshine does Galena have in May?
What are the months with the highest UV index?
What is the UV index intensity in May?
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).
Average pressure in May
Galena, AK
- Average pressure in May: 29.91"Hg
The month with the highest atmospheric pressure is February (29.93"Hg).
The months with the lowest atmospheric pressure are September and October (29.76"Hg).
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).
Average humidity in May
Galena, AK
- Average humidity in May: 70%
The months with the highest relative humidity are January, February and March (96%).
The month with the lowest relative humidity is June (59%).
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").
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).
The months with the least rainy days are January and February (2.3 days).
Average snowfall in May
Galena, AK
- Average snowfall in May: 0.39"
The month with the highest snowfall is December (8.62").
The months with the least snowfall are June, July and August (0").
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).
The months with the least snowfall days are June and July (0 days).
Average daylight in May /
Average sunshine in May
Galena, AK
- Average daylight in May: 18h and 5min
The month with the longest days is June (Average daylight: 21h and 24min).
The month with the shortest days is December (Average daylight: 4h and 0min).
- Average sunshine in May: 8h and 1min
The month with the most sunshine is May (Average sunshine: 8h and 6min).
The month with the least sunshine is December (Average sunshine: 2h and 18min).
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).
Average UV index in May
Galena, AK
- Average UV index in May: 4
The months with the highest UV index are May, June and July (UV index 4).
The months with the lowest UV index are January, February, March, October, November and December (UV index 1).
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).
Average visibility in May
Galena, AK
- Average visibility in May: 5mi
The months with the highest visibility are June and July (6mi).
The months with the lowest visibility are January, February, March, April and December (2mi).
Galena, Alaska, USA
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