May weather forecast and climate
Katalla, AK

Weather in May

May, the last month of the spring, in Katalla, is a frosty month, with average temperature varying between 48.6°F (9.2°C) and 40.5°F (4.7°C).

Temperature

In May, the average high-temperature slightly increases, from a wintry 40.6°F (4.8°C) in April, to a chilly 48.6°F (9.2°C). In May, in Katalla, Alaska, the average low-temperature is 40.5°F (4.7°C).

Humidity

The average relative humidity is 79%.

Rainfall

In May, the rain falls for 17.5 days. Throughout May, 4.25" (108mm) of precipitation is accumulated. Throughout the year, in Katalla, Alaska, there are 191.3 rainfall days, and 72.4" (1839mm) of precipitation is accumulated.

Snowfall

January through May, October through December are months with snowfall in Katalla, Alaska. May is the last month it regularly snows in Katalla. During 0.8 snowfall days, 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 17.3h.

Sunshine

Months with the most sunshine are May through July, with an average of 7.6h of sunshine.

UV index

In May, the average daily maximum UV index is 3. A UV Index reading of 3 to 5 represents a medium health hazard from unsafe exposure to the UV radiation for the ordinary person.
Note: In May, the average maximum UV index of 3 translate into the following recommendations:
Take precautions - Protection against sun damage is advised. 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 Katalla?

The average high-temperature, in May, in Katalla, is 48.6°F (9.2°C), while the average low-temperature is 40.5°F (4.7°C).

What is the average humidity in May in Katalla?

In Katalla, the average relative humidity in May is 79%.

How much does it rain in Katalla in May?

In Katalla, Alaska, during May, the rain falls for 17.5 days and regularly aggregates up to 4.25" (108mm) of precipitation.

What is the last month it snows in Katalla?

May is the last month it regularly snows in Katalla. During 0.8 snowfall days, in May, Katalla aggregates 0.31" (8mm) of snow.

What is the average length of the day in May in Katalla?

In Katalla, the average length of the day in May is 17.3h.

What is the month with the most sunshine in Katalla?

Months with the most sunshine in Katalla are May through July, with an average of 7.6h of sunshine.

How long on average sun shines in May in Katalla?

In Katalla, Alaska, the average sunshine in May is 7.6h.

What is the UV index reading in May in Katalla?

In May, the average daily maximum UV index in Katalla, Alaska, is 3. A UV Index estimate of 3 to 5 represents a medium health risk from unprotected exposure to the UV radiation.

Average temperature in May
Katalla, AK

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).

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Average pressure in May
Katalla, AK

Average pressure in May - Katalla, AK
  • Average pressure in May: 29.96"

The month with the highest atmospheric pressure is July (30").
The month with the lowest atmospheric pressure is November (29.65").

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Average wind speed in May
Katalla, AK

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).

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Average humidity in May
Katalla, AK

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%).

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Average rainfall in May
Katalla, AK

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").

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Average rainfall days in May
Katalla, AK

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).

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Average snowfall in May
Katalla, AK

Average snowfall in May - Katalla, AK
  • Average snowfall in May: 0.31"

The month with the highest snowfall is December (17.76").
Months with the least snowfall are June, July, August and September (0").

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Average snowfall days in May
Katalla, AK

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

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

Average daylight in May / Average sunshine in May - Katalla, AK
  • Average daylight in May: 17.3h

The month with the longest days is June (Average daylight: 18.8h).
The month with the shortest days is December (Average daylight: 6h).

  • Average sunshine in May: 7.6h

Months with the most sunshine are May, June and July (Average sunshine: 7.6h).
The month with the least sunshine is December (Average sunshine: 2.1h).

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Average sunshine days in May
Katalla, AK

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).

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Average UV index in May
Katalla, AK

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).
Months with the lowest UV index are November and December (UV index 1).

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Average cloud cover in May
Katalla, AK

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).

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Average visibility in May
Katalla, AK

Average visibility in May - Katalla, AK
  • Average visibility in May: 6mi

Months with the highest visibility are February, March, April, May, June, July, September, October and November (6mi).
Months with the lowest visibility are January, August and December (5mi).

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