September weather forecast
Port Huron, MI

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

Weather in September

September, the first month of the autumn in Port Huron, is also an agreeable month, with an average temperature varying between 55.2°F (12.9°C) and 71.2°F (21.8°C).

Temperature

In Port Huron, the average high-temperature in September marginally drops from a warm 77.5°F (25.3°C) in August to an agreeable 71.2°F (21.8°C). In Port Huron, the average low-temperature is 55.2°F (12.9°C).

Humidity

The average relative humidity in September in Port Huron is 78%.

Rainfall

In September, in Port Huron, the rain falls for 12.4 days. Throughout September, 1.38" (35mm) of precipitation is accumulated. Throughout the year, in Port Huron, Michigan, there are 140.4 rainfall days, and 19.41" (493mm) of precipitation is accumulated.

Snowfall

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

Ocean temperature

In Port Huron, the average water temperature is 69.4°F (20.8°C).
Note: Swimming in 69.4°F (20.8°C) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 69.8°F (21°C).

Daylight

In Port Huron, the average length of the day in September is 12h and 29min.
On the first day of the month, sunrise is at 6:54 am and sunset at 8:04 pm. On the last day of September, sunrise is at 7:26 am and sunset at 7:13 pm EDT.

Sunshine

In September, the average sunshine in Port Huron is 8.2h.

UV index

The average daily maximum UV index in September is 3. A UV Index of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for average individuals.
Note: In September, the average maximum UV index of 3 translate into the following recommendations:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the temperature in September in Port Huron?

In September, the average high-temperature is 71.2°F (21.8°C), and the average low-temperature is 55.2°F (12.9°C).

What is the average humidity in September in Port Huron?

In September, the average relative humidity in Port Huron is 78%.

How much does it rain in Port Huron in September?

In Port Huron, during September, the rain falls for 12.4 days and regularly aggregates up to 1.38" (35mm) of precipitation.

When it does not snow in Port Huron?

June through September are months without snowfall in Port Huron.

Does it snow in Port Huron in September?

In Port Huron, in September, it doesn't snow. In October, it regularly snows.

What is the ocean temperature in September in Port Huron?

In September, the average ocean temperature is 69.4°F (20.8°C). Swimming in 69.4°F (20.8°C) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 69.8°F (21°C).

What is the average length of the day in September in Port Huron?

In Port Huron, the average day length in September is 12h and 29min.

What time are sunrise and sunset in September in Port Huron?

In September, on the first day of the month, sunrise is at 6:54 am and sunset at 8:04 pm. On the last day of the month, in Port Huron, Michigan, sunrise is at 7:26 am and sunset at 7:13 pm EDT.

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

In Port Huron, the average sunshine duration in September is 8.2h.

What is the UV index reading in September in Port Huron?

The average daily maximum UV index in September is 3. A UV Index reading of 3 to 5 represents a medium health risk from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Port Huron, MI

Average temperature in September - Port Huron, MI
  • Average high temperature in September: 71.2°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 September: 55.2°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).

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Average pressure in September
Port Huron, MI

Average pressure in September - Port Huron, MI
  • Average pressure in September: 30.03"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).

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Average wind speed in September
Port Huron, MI

Average wind speed in September - Port Huron, MI
  • Average wind speed in September: 7.9mph

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).

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Average humidity in September
Port Huron, MI

Average humidity in September - Port Huron, MI
  • Average humidity in September: 78%

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

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Average rainfall in September
Port Huron, MI

Average rainfall in September - Port Huron, MI
  • Average rainfall in September: 1.38"

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

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Average rainfall days in September
Port Huron, MI

Average rainfall days in September - Port Huron, MI
  • Average rainfall days in September: 12.4 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).

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Average snowfall in September
Port Huron, MI

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

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

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Average snowfall days in September
Port Huron, MI

Average snowfall days in September - Port Huron, MI
  • Average snowfall days in September: 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).

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Average sea temperature in September
Port Huron, MI

Average sea temperature in September - Port Huron, MI
  • Average sea temperature in September: 69.4°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).

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

Average daylight in September / Average sunshine in September - Port Huron, MI
  • Average daylight in September: 12h and 29min

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 4min).

  • Average sunshine in September: 8h and 12min

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).

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Average sunshine days in September
Port Huron, MI

Average sunshine days in September - Port Huron, MI
  • Average sunshine days in September: 15 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).

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Average UV index in September
Port Huron, MI

Average UV index in September - Port Huron, MI
  • Average UV index in September: 3

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).

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Average cloud cover in September
Port Huron, MI

Average cloud cover in September - Port Huron, MI
  • Average cloud cover in September: 35

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

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Average visibility in September
Port Huron, MI

Average visibility in September - Port Huron, MI
  • Average visibility in September: 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).

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