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

July weather forecast and climate
Unalaska, AK

July in Unalaska, Alaska, is a mild summer month, with average temperature varying between 46°F (7.8°C) and 56.8°F (13.8°C).

Temperature

In Unalaska, the average high-temperature is almost the same as in June - a moderate 56.8°F (13.8°C). In July, the average low-temperature is 46°F (7.8°C).

Rainfall

July is the month with the least rainfall. Rain falls for 13 days and accumulates 2.2" (55.6mm) of precipitation.

Snowfall

June through September are months without snowfall in Unalaska.

Ocean temperature

In Unalaska, the average seawater temperature is 48.4°F (9.1°C).
Note: Swimming in 48.4°F (9.1°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

Daylight

In July, the average length of the day is 16.5h.

Sunshine

In July, the average sunshine in Unalaska is 7h.

UV index

The month with the highest UV index is July, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high health risk from unsafe exposure to the UV radiation for average individuals.
Note: The daily maximum UV index of 6 in July interpret into the following advice:
Take precautions and utilize sun safety practices. Protection against the skin and eye damage is required. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.

What is the temperature in July in Unalaska?

In Unalaska, in July, the average high-temperature is 56.8°F (13.8°C), and the average low-temperature is 46°F (7.8°C).

How many days does it rain in July in Unalaska?

In Unalaska, Alaska, in July, during 13 rainfall days, 2.2" (55.6mm) of precipitation is typically accumulated.

What is the driest month in Unalaska?

July is the month with the least rainfall in Unalaska, Alaska. Rain falls for 13 days and accumulates 2.2" (55.6mm) of precipitation.

When it does not snow in Unalaska?

In Unalaska, Alaska, snow does not fall in June through September.

What is the ocean temperature in July in Unalaska?

In Unalaska, the average seawater temperature in July is 48.4°F (9.1°C). At temperatures below 50°F (10°C), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Even a short swim, without thermal protection, at temperatures around 55.4°F (13°C) is not comfortable.

What is the average length of the day in July in Unalaska?

The average length of the day in July in Unalaska is 16.5h.

How many hours of sunshine does Unalaska have in July?

In July, the average sunshine in Unalaska is 7h.

When is the highest UV index in Unalaska?

The month with the highest UV index is July, with an average maximum UV index of 6.

How high is the UV index in July in Unalaska?

In July, the average daily maximum UV index in Unalaska is 6. A UV Index of 6 to 7 symbolizes a high hazard to health from unsafe exposure to the Sun's UV rays.
Average temperature in July - Unalaska, AK
  • Average high temperature in July: 56.8°F

The warmest month (with the highest average high temperature) is August (58.9°F).
The month with the lowest average high temperature is January (36.8°F).

  • Average low temperature in July: 46°F

The month with the highest average low temperature is August (47.7°F).
The coldest month (with the lowest average low temperature) is February (27.6°F).

Average rainfall in July - Unalaska, AK
  • Average rainfall in July: 2.2"

The wettest month (with the highest rainfall) is December (7.9").
The driest month (with the lowest rainfall) is July (2.2").

Average rainfall days in July - Unalaska, AK
  • Average rainfall days in July: 13 days

Months with the highest number of rainy days are October, November and December (23 days).
The month with the lowest number of rainy days is July (13 days).

Average snowfall in July - Unalaska, AK
  • Average snowfall in July: 0"

The month with the highest snowfall is January (23.8").
Months with the lowest snowfall are June, July, August and September (0").

Average sea temperature in July - Unalaska, AK
  • Average sea temperature in July: 48.4°F

The best month for swimming (with the highest average sea temperature) is August (50.1°F).
The coldest month (with the lowest average sea temperature) is February (38.8°F).

Average daylight in July / Average sunshine in July - Unalaska, AK
  • Average daylight in July: 16.5h

The month with the longest days is June (Average daylight: 17h).
The month with shortest days is December (Average daylight: 7.5h).

  • Average sunshine in July: 7h

Months with most sunshine are May and June (Average sunshine: 8h).
Months with least sunshine are November and December (Average sunshine: 5).

Average UV index in July - Unalaska, AK
  • Average UV index in July: 6

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).