August weather forecast
Port Huron, MI

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The iconic Blue Water Bridge in Port Huron, Michigan, at night
The iconic Blue Water Bridge in Port Huron, Michigan, at night

Weather in August

August signals the culmination of summer in Port Huron, with a relatively high temperature of 77.5°F (25.3°C). The warm weather persists, yet there is a subtle hint of the forthcoming fall season. Despite the warm days, evenings start to cool off, giving early signs of the change in seasons. The city enjoys clear skies and longer daylight hours, offering ideal weather for outdoor activities. In September, a noticeable shift towards cooler temperatures and increased rainfall indicates the onset of fall.

Temperature

Port Huron's average high-temperature in August is a still moderately hot 77.5°F (25.3°C), marking an insignificant difference from the 78.4°F (25.8°C) of July. Port Huron registers a consistent average low-temperature of 61°F (16.1°C) during August.

Humidity

In Port Huron, the average relative humidity in August is 79%.

Rainfall

In Port Huron, Michigan, in August, it is raining for 13.8 days, with typically 1.89" (48mm) of accumulated precipitation. In Port Huron, during the entire year, the rain falls for 140.4 days and collects up to 19.41" (493mm) of precipitation.

Snowfall

In Port Huron, snow does not fall in June through September.

Ocean temperature

With an average ocean temperature of 73.8°F (23.2°C), August is the month with the warmest seawater.
Note: For individuals prone to feeling cold, swimming in 73.4°F (23°C) is still regarded as intolerable. A wetsuit is not a necessity, but sunshine, wind, and air temperature are essential factors for relishing swimming at 73.8°F (23.2°C).

Daylight

In August, the average length of the day is 13h and 53min.
On the first day of the month, sunrise is at 6:21 am and sunset at 8:50 pm. On the last day of August, sunrise is at 6:53 am and sunset at 8:05 pm EDT.

Sunshine

In Port Huron, the average sunshine in August is 10h.

UV index

July and August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high threat to health from exposure to the Sun's UV radiation for the average person.
Note: The maximum daily UV index of 6 during August translates into the following directions:
Conform to measures and uphold sun safety traditions. Warding off skin and eye harm is necessary. Stay out of direct sunlight between 10 a.m. and 4 p.m., when UV radiation is most intense, and remember that not all shade structures provide complete protection. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit. Notice! Sand and water reflections contribute to a stronger UV exposure.

Frequently asked questions

What are the temperatures in August?

An average high-temperature, in August, in Port Huron, is 77.5°F (25.3°C) and the average low-temperature is 61°F (16.1°C).

What is the average humidity in August?

In Port Huron, the average relative humidity in August is 79%.

How many days does it rain in August?

In Port Huron, during August, the rain falls for 13.8 days and regularly aggregates up to 1.89" (48mm) of precipitation.

When it does not snow?

In Port Huron, snow does not fall in June through September.

What month is the ocean warmest?

With an average ocean temperature of 73.8°F (23.2°C), August is the month with the warmest seawater.

What is the water temperature in August?

In August, the average ocean temperature in Port Huron is 73.8°F (23.2°C). For individuals prone to feeling cold, swimming in 73.4°F (23°C) is still regarded as intolerable. A wetsuit is not a necessity, but sunshine, wind, and air temperature are essential factors for relishing swimming at 73.8°F (23.2°C).

How many hours of daylight does Port Huron have in August?

In August, the average day length is 13h and 53min.

When is the sunrise / sunset in August?

On the first day of August in Port Huron, sunrise is at 6:21 am and sunset at 8:50 pm. On the last day of the month, sunrise is at 6:53 am and sunset at 8:05 pm EDT.

How many hours of sunshine does Port Huron have in August?

In Port Huron, the average sunshine duration in August is 10h.

When is the highest UV index?

July and August, with an average maximum UV index of 6, are months with the highest UV index.

What is the UV index reading in August?

In Port Huron, the average daily maximum UV index in August is 6. A UV Index reading of 6 to 7 represents a high hazard to health from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in August
Port Huron, MI

Average temperature in August - Port Huron, MI
  • Average high temperature in August: 77.5°F

The warmest month (with the highest average high temperature) is July (78.4°F).
The month with the lowest average high temperature is January (27.9°F).

  • Average low temperature in August: 61°F

The month with the highest average low temperature is July (61.3°F).
The coldest month (with the lowest average low temperature) is January (18.5°F).

Average pressure in August
Port Huron, MI

Average pressure in August - Port Huron, MI
  • Average pressure in August: 29.97"Hg

The month with the highest atmospheric pressure is March (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

Average wind speed in August
Port Huron, MI

Average wind speed in August - Port Huron, MI
  • Average wind speed in August: 7.1mph

The windiest month (with the highest average wind speed) is January (11.3mph).
The calmest month (with the lowest average wind speed) is July (6.8mph).

Average humidity in August
Port Huron, MI

Average humidity in August - Port Huron, MI
  • Average humidity in August: 79%

The month with the highest relative humidity is February (86%).
The months with the lowest relative humidity are April and May (76%).

Average rainfall in August
Port Huron, MI

Average rainfall in August - Port Huron, MI
  • Average rainfall in August: 1.89"

The wettest month (with the highest rainfall) is May (2.13").
The driest month (with the least rainfall) is February (1.1").

Average rainfall days in August
Port Huron, MI

Average rainfall days in August - Port Huron, MI
  • Average rainfall days in August: 13.8 days

The month with the highest number of rainy days is May (15.7 days).
The month with the least rainy days is February (5.7 days).

Average snowfall in August
Port Huron, MI

Average snowfall in August - Port Huron, MI
  • Average snowfall in August: 0"

The month with the highest snowfall is February (3.9").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in August
Port Huron, MI

Average snowfall days in August - Port Huron, MI
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is January (14.4 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average sea temperature in August
Port Huron, MI

Average sea temperature in August - Port Huron, MI
  • Average sea temperature in August: 73.7°F

The best month for swimming (with the highest average sea temperature) is August (73.7°F).
The coldest month (with the lowest average sea temperature) is February (32.4°F).

Average daylight in August /
Average sunshine in August
Port Huron, MI

Average daylight in August / Average sunshine in August - Port Huron, MI
  • Average daylight in August: 13h and 5min

The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).

  • Average sunshine in August: 10h and 0min

The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 2h and 54min).

Average sunshine days in August
Port Huron, MI

Average sunshine days in August - Port Huron, MI
  • Average sunshine days in August: 13.7 days

The month with the most sunshine days is November (15.2 days).
The month with the least sunshine days is February (11.3 days).

Average UV index in August
Port Huron, MI

Average UV index in August - Port Huron, MI
  • Average UV index in August: 6

The months with the highest UV index are July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 1).

Average cloud cover in August
Port Huron, MI

Average cloud cover in August - Port Huron, MI
  • Average cloud cover in August: 31

The month with the most cloud cover is January (Cloud cover 70).
The month with the least cloud cover is July (Cloud cover 30).

Average visibility in August
Port Huron, MI

Average visibility in August - Port Huron, MI
  • Average visibility in August: 6mi

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

Port Huron, Michigan, USA

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