July weather forecast
Petersburg, AK

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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, being the warmest month in the year, exhibits elevated temperatures and stricter UV indexes in Petersburg. As rainfall increases, humidity levels also rise, creating a unique balance of sun and rain. The high sea temperature of 52.1°F (11.2°C) makes it an appealing period for water-based activities. July presents the best of summer, blending the charm of extended sunshine hours with the frequent light showers. Despite the onset of rains, July weather maintains the quaint appeal of Petersburg.

Temperature

Petersburg's temperatures peak on average in July, reaching 59.7°F (15.4°C) at their highest and 50.2°F (10.1°C) at their lowest.

Humidity

In Petersburg, Alaska, the average relative humidity in July is 85%.

Rainfall

In Petersburg, during July, the rain falls for 17 days and regularly aggregates up to 3.5" (89mm) of precipitation. In Petersburg, 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 Petersburg, the average seawater temperature in July is 52.2°F (11.2°C).
Note: With an efficient thermal swimsuit, one can navigate 52.2°F (11.2°C) even if it's colder than 50°F (10°C); otherwise, rapid cold shock and breathlessness might set in. Barely wading at 55.4°F (13°C) feels chilly.

Daylight

The average length of the day in July is 17h and 5min.
On the first day of the month, sunrise is at 4:04 am and sunset at 9:46 pm. On the last day of July, in Petersburg, sunrise is at 4:51 am and sunset at 9:04 pm AKDT.

Sunshine

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 in Petersburg. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for average individuals.
Note: A typical high UV index of 4 in July suggests the following recommendations:
Adopt protective measures - It is advised to guard against sun damage. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation.
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Frequently asked questions

What part of the year is the hottest in Petersburg?

July brings the highest temperatures in Petersburg, Alaska, with an average high of 59.7°F (15.4°C) and an average low of 50.2°F (10.1°C).

What is the temperature in July in Petersburg?

The high-temperature, in July, in Petersburg, is 59.7°F (15.4°C), while the low-temperature averages to 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, Alaska, in July, it is raining for 17 days, with typically 3.5" (89mm) of accumulated precipitation.

When it does not snow in Petersburg?

June through September are months without snowfall in Petersburg, Alaska.

What is the ocean temperature in July in Petersburg?

In Petersburg, Alaska, the average seawater temperature in July is 52.2°F (11.2°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 Petersburg?

In July, the average day length in Petersburg is 17h and 5min.

What time are sunrise and sunset in July in Petersburg?

In July, on the first day of the month, sunrise is at 4:04 am and sunset at 9:46 pm. On the last day of the month, in Petersburg, sunrise is at 4:51 am and sunset at 9:04 pm AKDT.

How many hours of sunshine does Petersburg have in July?

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

What are the months with the highest UV index in Petersburg?

The months with the highest UV index in Petersburg, Alaska, are July and August, with an average maximum UV index of 4.

What is the UV index reading in July in Petersburg?

In July, the average daily maximum UV index in Petersburg is 4. A UV Index value of 3 to 5 symbolizes a moderate health threat from exposure to the Sun's UV radiation.
Today
Tomorrow
Long-term
YearJFMAMJJulyASOND
Jun
July
Aug
Average high temperature
55.4°F 13°C
59.7°F 15.4°C
59°F 15°C
Average low temperature
46.2°F 7.9°C
50.2°F 10.1°C
50°F 10°C
Average pressure
29.98" 761mmHg
30.05" 763mmHg
29.98" 761mmHg
Average wind speed
4.1mph 6.6km/h
3.9mph 6.3km/h
4.3mph 6.9km/h
Average max. wind speed
4.4mph 7.1km/h
4.2mph 6.8km/h
4.7mph 7.6km/h
Average wind speed gusts
6.6mph 10.6km/h
6.4mph 10.3km/h
7.3mph 11.7km/h
Average humidity
83%
85%
86%
Average rainfall
3.19" 81mm
3.5" 89mm
5.55" 141mm
Average rainfall days
19.3
17
17.7
Average snowfall
0" 0mm
0" 0mm
0" 0mm
Average snowfall days
0
0
0
Average sea temperature
49.3°F 9.6°C
52.1°F 11.2°C
54.2°F 12.3°C
Average daylight
17h 4min
17h 1min
15h 1min
Average sunshine
7h 1min
6h 5min
6h 5min
Average sunshine days
9
11.8
12.3
Average UV index
3
4
4
Average cloud cover
61%
58%
57%
Average visibility
6mi 9.7km
5mi 8km
5mi 8km

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"Hg

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

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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%

The 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").
The 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).
The 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: 17h and 1min

The month with the longest days is June (Average daylight: 17h and 42min).
The month with the shortest days is December (Average daylight: 6h and 54min).

  • Average sunshine in July: 6h and 5min

The month with the most sunshine is May (Average sunshine: 7h and 24min).
The months with the least sunshine are January and November (Average sunshine: 3h and 24min).

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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

The months with the highest UV index are July and August (UV index 4).
The 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).
The 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

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

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Petersburg, Alaska, USA

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