May weather forecastKatalla, AK
May
Weather in May
The last month of the spring, May, is a chilly month in Katalla, Alaska, with temperature in the range of an average high of 48.6°F (9.2°C) and an average low of 40.5°F (4.7°C).Temperature
The start of May brings a subtle shift in the average high-temperature, edging up from April's wintry 40.6°F (4.8°C) to a chilly 48.6°F (9.2°C). May's average low-temperature in Katalla is a cold 40.5°F (4.7°C), reflecting a minor difference from the day's peak temperatures.Humidity
The average relative humidity in May is 79%.Rainfall
In Katalla, Alaska, during May, the rain falls for 17.5 days and regularly aggregates up to 4.25" (108mm) of precipitation. Throughout the year, there are 191.3 rainfall days, and 72.4" (1839mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. May is the last month it regularly snows. During 0.8 snowfall days, in May, Katalla aggregates 0.31" (8mm) of snow. Throughout the year, there are 66.1 snowfall days, and 74.57" (1894mm) of snow is accumulated.Daylight
In May, the average length of the day is 17h and 17min.On the first day of the month, sunrise is at 5:31 am and sunset at 9:38 pm. On the last day of May, in Katalla, sunrise is at 4:24 am and sunset at 10:46 pm AKDT.
Sunshine
May through July, with an average of 7.6h of sunshine, are months with the most sunshine.UV index
In Katalla, the average daily maximum UV index in May is 3. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for the average person.Note: The average daily UV index of 3 in May transforms into the following instructions:
Be mindful. Those with pale skin might receive burns in fewer than 30 minutes. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage. Alert! The snow's reflection can amplify the UV radiation of the Sun nearly twice.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Katalla, AK
- Average high temperature in May: 48.6°F
The warmest month (with the highest average high temperature) is July (58.6°F).
The month with the lowest average high temperature is January (30.2°F).
- Average low temperature in May: 40.5°F
The month with the highest average low temperature is August (50°F).
The coldest month (with the lowest average low temperature) is January (24.8°F).
Average pressure in May
Katalla, AK
- Average pressure in May: 29.96"Hg
The month with the highest atmospheric pressure is July (30"Hg).
The month with the lowest atmospheric pressure is November (29.65"Hg).
Average wind speed in May
Katalla, AK
- Average wind speed in May: 6.2mph
The windiest months (with the highest average wind speed) are January and November (12.1mph).
The calmest month (with the lowest average wind speed) is June (5.2mph).
Average humidity in May
Katalla, AK
- Average humidity in May: 79%
The month with the highest relative humidity is August (84%).
The month with the lowest relative humidity is November (75%).
Average rainfall in May
Katalla, AK
- Average rainfall in May: 4.25"
The wettest month (with the highest rainfall) is October (9.09").
The driest month (with the least rainfall) is June (2.72").
Average rainfall days in May
Katalla, AK
- Average rainfall days in May: 17.5 days
The month with the highest number of rainy days is August (21 days).
The month with the least rainy days is February (9.6 days).
Average snowfall in May
Katalla, AK
- Average snowfall in May: 0.31"
The month with the highest snowfall is December (17.76").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Katalla, AK
- Average snowfall days in May: 0.8 days
The month with the highest number of snowfall days is December (12.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Katalla, AK
- Average daylight in May: 17h and 18min
The month with the longest days is June (Average daylight: 18h and 48min).
The month with the shortest days is December (Average daylight: 6h and 0min).
- Average sunshine in May: 7h and 36min
The months with the most sunshine are May, June and July (Average sunshine: 7h and 36min).
The month with the least sunshine is December (Average sunshine: 2h and 6min).
Average sunshine days in May
Katalla, AK
- Average sunshine days in May: 11.5 days
The month with the most sunshine days is July (12.1 days).
The month with the least sunshine days is September (8 days).
Average UV index in May
Katalla, AK
- Average UV index in May: 3
The month with the highest UV index is July (UV index 4).
The months with the lowest UV index are November and December (UV index 1).
Average cloud cover in May
Katalla, AK
- Average cloud cover in May: 57
The month with the most cloud cover is December (Cloud cover 68).
The month with the least cloud cover is May (Cloud cover 57).
Average visibility in May
Katalla, AK
- Average visibility in May: 6mi
The months with the highest visibility are February, March, April, May, June, July, September, October and November (6mi).
The months with the lowest visibility are January, August and December (5mi).
