July weather forecast and climate
Petersburg, AK

Colorful buildings, docked ships in Quaint fishing village in Petersburg, Alaska, on Mitkof Island
Colorful buildings, docked ships in Quaint fishing village in Petersburg, Alaska, on Mitkof Island

Weather in July

July, like June, is a moderate summer month in Petersburg, Alaska, with temperature in the range of an average high of 59.7°F (15.4°C) and an average low of 50.2°F (10.1°C).

Temperature

With an average high-temperature of 59.7°F (15.4°C) and an average low-temperature of 50.2°F (10.1°C), July is the warmest month.

Humidity

In July, the average relative humidity is 85%.

Rainfall

In July, in Petersburg, Alaska, the rain falls for 17 days. Throughout July, 3.5" (89mm) of precipitation is accumulated. In Petersburg, Alaska, during the entire year, the rain falls for 197.9 days and collects up to 53.03" (1347mm) of precipitation.

Snowfall

June through September are months without snowfall in Petersburg.

Ocean temperature

In July, the average ocean temperature is 52.2°F (11.2°C).
Note: Swimming in 52.2°F (11.2°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

Daylight

In Petersburg, the average length of the day is 17.1h.

Sunshine

In Petersburg, the average sunshine in July is 6.8h.

UV index

July and August, with an average maximum UV index of 4, are months with the highest UV index. A UV Index reading of 3 to 5 represents a moderate threat to health from the exposure to the Sun's UV radiation for average individuals.
Note: The daily maximum UV index of 4 interpret into the following advice:
Take precautions - Protection against sun damage is advised. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. 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.
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FAQ

What is the warmest month in Petersburg?

July is the warmest month in Petersburg, Alaska, with an average high-temperature of 59.7°F (15.4°C) and an average low-temperature of 50.2°F (10.1°C).

What is the temperature in July in Petersburg?

In July, in Petersburg, Alaska, the average high-temperature is 59.7°F (15.4°C), and the average low-temperature is 50.2°F (10.1°C).

What is the average humidity in July in Petersburg?

The average relative humidity in July in Petersburg is 85%.

How much does it rain in Petersburg in July?

In Petersburg, in July, it is raining for 17 days, with typically 3.5" (89mm) of accumulated precipitation.

When it does not snow in Petersburg?

In Petersburg snow does not fall in June through September.

What is the water temperature in July in Petersburg?

In Petersburg, Alaska, in July, the average water temperature is 52.2°F (11.2°C). Swimming in 52.2°F (11.2°C) is considered life-threatening. Even a few minutes in 55.4°F (13°C) water is uncomfortable, and swimming below 50°F (10°C) may cause total loss of breathing control and cold shock, depending on a person's physique.

How many hours of daylight does Petersburg have in July?

The average length of the day in July in Petersburg is 17.1h.

How many hours of sunshine does Petersburg have in July?

The average sunshine in July in Petersburg, Alaska, is 6.8h.

When is the highest UV index in Petersburg?

Months with the highest UV index are July and August, with an average maximum UV index of 4.

What is the UV index reading in July in Petersburg?

In Petersburg, Alaska, the average daily maximum UV index in July is 4. A UV Index reading of 3 to 5 represents a moderate vulnerability from the exposure to the Sun's UV rays.

Average temperature in July
Petersburg, AK

Average temperature in July - Petersburg, AK
  • Average high temperature in July: 59.7°F

The warmest month (with the highest average high temperature) is July (59.7°F).
The month with the lowest average high temperature is December (32.4°F).

  • Average low temperature in July: 50.2°F

The month with the highest average low temperature is July (50.2°F).
The coldest month (with the lowest average low temperature) is February (25.9°F).

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Average pressure in July
Petersburg, AK

Average pressure in July - Petersburg, AK
  • Average pressure in July: 30.05"

The month with the highest atmospheric pressure is July (30.05").
The month with the lowest atmospheric pressure is November (29.8").

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Average wind speed in July
Petersburg, AK

Average wind speed in July - Petersburg, AK
  • Average wind speed in July: 3.9mph

The windiest month (with the highest average wind speed) is January (8.2mph).
The calmest month (with the lowest average wind speed) is July (3.9mph).

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Average humidity in July
Petersburg, AK

Average humidity in July - Petersburg, AK
  • Average humidity in July: 85%

Months with the highest relative humidity are January and August (86%).
The month with the lowest relative humidity is May (81%).

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Average rainfall in July
Petersburg, AK

Average rainfall in July - Petersburg, AK
  • Average rainfall in July: 3.5"

The wettest month (with the highest rainfall) is October (6.3").
The driest month (with the least rainfall) is May (2.01").

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Average rainfall days in July
Petersburg, AK

Average rainfall days in July - Petersburg, AK
  • Average rainfall days in July: 17 days

The month with the highest number of rainy days is October (20.1 days).
The month with the least rainy days is February (9.5 days).

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Average snowfall in July
Petersburg, AK

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

The month with the highest snowfall is March (13.46").
Months with the least snowfall are June, July, August and September (0").

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Average snowfall days in July
Petersburg, AK

Average snowfall days in July - Petersburg, AK
  • Average snowfall days in July: 0 days

The month with the highest number of snowfall days is March (10.8 days).
Months with the least snowfall days are June, July, August and September (0 days).

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Average sea temperature in July
Petersburg, AK

Average sea temperature in July - Petersburg, AK
  • Average sea temperature in July: 52.1°F

The best month for swimming (with the highest average sea temperature) is August (54.2°F).
The coldest month (with the lowest average sea temperature) is March (41°F).

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Average daylight in July /
Average sunshine in July
Petersburg, AK

Average daylight in July / Average sunshine in July - Petersburg, AK
  • Average daylight in July: 17.1h

The month with the longest days is June (Average daylight: 17.7h).
The month with the shortest days is December (Average daylight: 6.9h).

  • Average sunshine in July: 6.8h

The month with the most sunshine is May (Average sunshine: 7.4h).
Months with the least sunshine are January and November (Average sunshine: 3.4).

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Average sunshine days in July
Petersburg, AK

Average sunshine days in July - Petersburg, AK
  • Average sunshine days in July: 11.8 days

The month with the most sunshine days is December (12.5 days).
The month with the least sunshine days is November (8 days).

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Average UV index in July
Petersburg, AK

Average UV index in July - Petersburg, AK
  • Average UV index in July: 4

Months with the highest UV index are July and August (UV index 4).
Months with the lowest UV index are November and December (UV index 1).

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Average cloud cover in July
Petersburg, AK

Average cloud cover in July - Petersburg, AK
  • Average cloud cover in July: 58

The month with the most cloud cover is January (Cloud cover 66).
Months with the least cloud cover are February and May (Cloud cover 54).

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Average visibility in July
Petersburg, AK

Average visibility in July - Petersburg, AK
  • Average visibility in July: 5mi

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

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