September weather forecast and climate
Trenton, MI

Weather in September

September, the first month of the autumn, in Trenton, is also an agreeable month, with temperature in the range of an average high of 72°F (22.2°C) and an average low of 59.2°F (15.1°C).

Temperature

In Trenton, the average high-temperature marginally drops, from a warm 77.5°F (25.3°C) in August, to an agreeable 72°F (22.2°C). In Trenton, Michigan,, the average low-temperature is 59.2°F (15.1°C).

Humidity

In September, the average relative humidity is 76%.

Rainfall

In Trenton, Michigan, during September, the rain falls for 13.5 days and regularly aggregates up to 1.89" (48mm) of precipitation. Throughout the year, there are 151.6 rainfall days, and 26.97" (685mm) of precipitation is accumulated.

Snowfall

In Trenton snow does not fall in June through October.

Ocean temperature

In September, the average ocean temperature in Trenton is 70.5°F (21.4°C).
Note: For most, swimming in 70.5°F (21.4°C) is not an enjoyable activity. Furthermore, controlling your breathing becomes progressively more difficult as the water temperature decreases from 69.8°F (21°C) to 59°F (15°C).

Daylight

In Trenton, Michigan, the average length of the day is 12.5h.

Sunshine

The average sunshine is 8.3h.

UV index

In September, the average daily maximum UV index in Trenton is 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from unsafe exposure to the UV radiation for average individuals.
Note: The average daily UV index of 4 in September transform into the following instructions:
Take precautions - Protection against sunburn is recommended. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Caution! The reflection of sand and water significantly increases the intensity of the Sun's UV radiation.
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FAQ

What is the average humidity in September in Trenton?

In Trenton, the average relative humidity in September is 76%.

How many days does it rain in September in Trenton?

In September, the rain falls for 13.5 days. Throughout September, 1.89" (48mm) of precipitation is accumulated.

When it does not snow in Trenton?

June through October are months without snowfall in Trenton.

What is the ocean temperature in September in Trenton?

In September, the average ocean temperature is 70.5°F (21.4°C). Swimming in 70.5°F (21.4°C) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 69.8°F (21°C).

How many hours of daylight does Trenton have in September?

In Trenton, the average length of the day in September is 12.5h.

How many hours of sunshine does Trenton have in September?

In Trenton, the average sunshine in September is 8.3h.

What is the UV index intensity in September in Trenton?

The average daily maximum UV index in September in Trenton, Michigan, is 4. A UV Index of 3 to 5 symbolizes a medium health risk from unprotected exposure to the UV radiation.

Average temperature in September
Trenton, MI

Average temperature in September - Trenton, MI
  • Average high temperature in September: 72°F

The warmest month (with the highest average high temperature) is July (79.2°F).
The month with the lowest average high temperature is January (29.5°F).

  • Average low temperature in September: 59.2°F

The month with the highest average low temperature is July (65.7°F).
The coldest month (with the lowest average low temperature) is January (19.8°F).

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Average pressure in September
Trenton, MI

Average pressure in September - Trenton, MI
  • Average pressure in September: 30.04"

The month with the highest atmospheric pressure is November (30.1").
The month with the lowest atmospheric pressure is June (29.93").

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Average wind speed in September
Trenton, MI

Average wind speed in September - Trenton, MI
  • Average wind speed in September: 8.4mph

The windiest months (with the highest average wind speed) are January and November (10.8mph).
The calmest month (with the lowest average wind speed) is July (7.1mph).

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Average humidity in September
Trenton, MI

Average humidity in September - Trenton, MI
  • Average humidity in September: 76%

The month with the highest relative humidity is February (85%).
The month with the lowest relative humidity is October (75%).

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Average rainfall in September
Trenton, MI

Average rainfall in September - Trenton, MI
  • Average rainfall in September: 1.89"

The wettest month (with the highest rainfall) is June (3.43").
The driest month (with the least rainfall) is December (1.26").

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Average rainfall days in September
Trenton, MI

Average rainfall days in September - Trenton, MI
  • Average rainfall days in September: 13.5 days

The month with the highest number of rainy days is July (18.1 days).
The month with the least rainy days is February (6.5 days).

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Average snowfall in September
Trenton, MI

Average snowfall in September - Trenton, MI
  • Average snowfall in September: 0"

The month with the highest snowfall is February (4.17").
Months with the least snowfall are June, July, August, September and October (0").

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Average snowfall days in September
Trenton, MI

Average snowfall days in September - Trenton, MI
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (10.3 days).
Months with the least snowfall days are June, July, August, September and October (0 days).

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Average sea temperature in September
Trenton, MI

Average sea temperature in September - Trenton, MI
  • Average sea temperature in September: 70.6°F

The best month for swimming (with the highest average sea temperature) is August (75.4°F).
The coldest month (with the lowest average sea temperature) is February (32.7°F).

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Average daylight in September /
Average sunshine in September
Trenton, MI

Average daylight in September / Average sunshine in September - Trenton, MI
  • Average daylight in September: 12.5h

The month with the longest days is June (Average daylight: 15.2h).
The month with the shortest days is December (Average daylight: 9.2h).

  • Average sunshine in September: 8.3h

The month with the most sunshine is July (Average sunshine: 10.6h).
The month with the least sunshine is January (Average sunshine: 3.1h).

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Average sunshine days in September
Trenton, MI

Average sunshine days in September - Trenton, MI
  • Average sunshine days in September: 14 days

The month with the most sunshine days is November (18.2 days).
The month with the least sunshine days is July (10.3 days).

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Average UV index in September
Trenton, MI

Average UV index in September - Trenton, MI
  • Average UV index in September: 4

Months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).

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Average cloud cover in September
Trenton, MI

Average cloud cover in September - Trenton, MI
  • Average cloud cover in September: 31

The month with the most cloud cover is January (Cloud cover 67).
Months with the least cloud cover are July and August (Cloud cover 28).

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Average visibility in September
Trenton, MI

Average visibility in September - Trenton, MI
  • Average visibility in September: 6mi

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

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