Ketchikan
Alaska, USA
Long-term weather forecast
Long-term weather forecast

August weather forecast and climate
Ketchikan, AK

Beautiful and colorful houses along the iconic waterfront boardwalk on Creek Street in Ketchikan, Alaska
Beautiful and colorful houses along the iconic waterfront boardwalk on Creek Street in Ketchikan, Alaska
The last month of the summer, August, is also an enjoyable month in Ketchikan, Alaska, with average temperature ranging between min 52.2°F (11.2°C) and max 64.6°F (18.1°C).

Temperature

August is the warmest month, with an average high-temperature of 64.6°F (18.1°C) and an average low-temperature of 52.2°F (11.2°C).

Rainfall

In Ketchikan, in August, it is raining for 16 days, with typically 10.8" (274.3mm) of accumulated precipitation. Throughout the year, in Ketchikan, there are 229 rainfall days, and 153.2" (3892.3mm) of precipitation is accumulated.

Snowfall

In Ketchikan snow does not fall in June through September.

Ocean temperature

The month with the warmest seawater in Ketchikan is August, with an average ocean temperature of 55.9°F (13.3°C).
Note: Swimming in 55.9°F (13.3°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

Daylight

In August, the average length of the day in Ketchikan is 14.9h.

Sunshine

The average sunshine in Ketchikan is 5h.

UV index

In Ketchikan, the average daily maximum UV index in August is 5. A UV Index reading of 3 to 5 represents a medium health hazard from the exposure to the Sun's UV rays for ordinary individuals.
Note: The average daily UV index of 5 in August transform into the following instructions:
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.

What is the warmest month in Ketchikan?

With an average high-temperature of 64.6°F (18.1°C) and an average low-temperature of 52.2°F (11.2°C), August is the warmest month in Ketchikan, Alaska.

What is the temperature in August in Ketchikan?

The average high-temperature, in August, in Ketchikan, Alaska, is 64.6°F (18.1°C), while the average low-temperature is 52.2°F (11.2°C).

How many days does it rain in August in Ketchikan?

In Ketchikan, Alaska, in August, it is raining for 16 days, with typically 10.8" (274.3mm) of accumulated precipitation.

When it does not snow in Ketchikan?

June through September are months without snowfall in Ketchikan.

What month is the ocean warmest in Ketchikan?

With an average ocean temperature of 55.9°F (13.3°C), August is the month with the warmest seawater in Ketchikan.

How cold is the water in August in Ketchikan?

In August, the average ocean temperature is 55.9°F (13.3°C). Swimming in 55.9°F (13.3°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

What is the average length of the day in August in Ketchikan?

The average length of the day in August is 14.9h.

How many hours of sunshine does Ketchikan have in August?

In Ketchikan, the average sunshine in August is 5h.

What is the UV index reading in August in Ketchikan?

The average daily maximum UV index in August in Ketchikan is 5. A UV Index value of 3 to 5 symbolizes a moderate health threat from unsafe exposure to the Sun's UV rays.
Average temperature in August - Ketchikan, AK
  • Average high temperature in August: 64.5°F

The warmest month (with the highest average high temperature) is August (64.5°F).
The month with the lowest average high temperature is January (38.4°F).

  • Average low temperature in August: 52.1°F

The month with the highest average low temperature is August (52.1°F).
The coldest month (with the lowest average low temperature) is January (28.8°F).

Average rainfall in August - Ketchikan, AK
  • Average rainfall in August: 10.8"

The wettest month (with the highest rainfall) is October (22.2").
Driest months (with the lowest rainfall) are June and July (7.4").

Average rainfall days in August - Ketchikan, AK
  • Average rainfall days in August: 16 days

The month with the highest number of rainy days is October (24 days).
The month with the lowest number of rainy days is July (15 days).

Average snowfall in August - Ketchikan, AK
  • Average snowfall in August: 0"

The month with the highest snowfall is January (13.3").
Months with the lowest snowfall are June, July, August and September (0").

Average sea temperature in August - Ketchikan, AK
  • Average sea temperature in August: 55.9°F

The best month for swimming (with the highest average sea temperature) is August (55.9°F).
The coldest month (with the lowest average sea temperature) is March (42.5°F).

Average daylight in August / Average sunshine in August - Ketchikan, AK
  • Average daylight in August: 14.9h

The month with the longest days is June (Average daylight: 17.4h).
The month with shortest days is December (Average daylight: 7.2h).

  • Average sunshine in August: 5h

The month with most sunshine is May (Average sunshine: 6h).
The month with least sunshine is December (Average sunshine: 1h).

Average UV index in August - Ketchikan, AK
  • Average UV index in August: 5

The month with the highest UV index is July (UV index 6).
Months with the lowest UV index are January and December (UV index 0).