September weather forecast
Port Clinton, OH

Weather in September

The first month of the autumn, September, is still a pleasant month in Port Clinton, Ohio, with an average temperature varying between 70.9°F (21.6°C) and 60.3°F (15.7°C).

Temperature

In September, the average high-temperature is relatively the same as in August - an agreeable 70.9°F (21.6°C). The average low-temperature, in Port Clinton, is 60.3°F (15.7°C).

Humidity

In Port Clinton, the average relative humidity in September is 77%.

Rainfall

In Port Clinton, during 14.2 rainfall days, 2.64" (67mm) of precipitation is typically accumulated. In Port Clinton, during the entire year, the rain falls for 163.4 days and collects up to 34.92" (887mm) of precipitation.

Snowfall

June through October are months without snowfall in Port Clinton.

Ocean temperature

In Port Clinton, Ohio, the average seawater temperature in September is 71.2°F (21.8°C).
Note: Swimming in 71.2°F (21.8°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 Clinton, Ohio, the average length of the day in September is 12h and 28min.
On the first day of the month, sunrise is at 6:58 am and sunset at 8:05 pm. On the last day of September, in Port Clinton, sunrise is at 7:27 am and sunset at 7:15 pm EDT.

Sunshine

In Port Clinton, the average sunshine in September is 8h.

UV index

In September, the average daily maximum UV index in Port Clinton, Ohio, is 4. A UV Index of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: In September, the average maximum UV index of 4 translate into the following recommendations:
Take precautions - Protection against skin and eye damage is obliged. 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 temperature in September in Port Clinton?

In Port Clinton, Ohio, in September, the average high-temperature is 70.9°F (21.6°C), and the average low-temperature is 60.3°F (15.7°C).

What is the average humidity in September in Port Clinton?

In September, the average relative humidity in Port Clinton, Ohio, is 77%.

How many days does it rain in September in Port Clinton?

In Port Clinton, in September, it is raining for 14.2 days, with typically 2.64" (67mm) of accumulated precipitation.

When it does not snow in Port Clinton?

June through October are months without snowfall in Port Clinton.

What is the ocean temperature in September in Port Clinton?

In Port Clinton, Ohio, the average seawater temperature in September is 71.2°F (21.8°C). Swimming in 71.2°F (21.8°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 Clinton?

In Port Clinton, the average day length in September is 12h and 28min.

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

In September, on the first day of the month, sunrise is at 6:58 am and sunset at 8:05 pm. On the last day of the month, in Port Clinton, Ohio, sunrise is at 7:27 am and sunset at 7:15 pm EDT.

How long on average sun shines in September in Port Clinton?

In Port Clinton, the average sunshine duration in September is 8h.

What is the UV index intensity in September in Port Clinton?

The average daily maximum UV index in September in Port Clinton is 4. A UV Index reading of 3 to 5 represents a moderate health threat from unsafe exposure to Sun's UV rays.
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 Clinton, OH

Average temperature in September - Port Clinton, OH
  • Average high temperature in September: 70.9°F

The warmest month (with the highest average high temperature) is July (77.7°F).
The month with the lowest average high temperature is January (30.6°F).

  • Average low temperature in September: 60.3°F

The month with the highest average low temperature is July (66.7°F).
The coldest month (with the lowest average low temperature) is January (21°F).

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Average pressure in September
Port Clinton, OH

Average pressure in September - Port Clinton, OH
  • Average pressure in September: 30.04"Hg

The month with the highest atmospheric pressure is November (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

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Average wind speed in September
Port Clinton, OH

Average wind speed in September - Port Clinton, OH
  • Average wind speed in September: 8.9mph

The windiest month (with the highest average wind speed) is January (12.1mph).
The calmest month (with the lowest average wind speed) is July (7.5mph).

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Average humidity in September
Port Clinton, OH

Average humidity in September - Port Clinton, OH
  • Average humidity in September: 77%

The months with the highest relative humidity are January and February (84%).
The month with the lowest relative humidity is October (74%).

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Average rainfall in September
Port Clinton, OH

Average rainfall in September - Port Clinton, OH
  • Average rainfall in September: 2.64"

The wettest month (with the highest rainfall) is June (4.76").
The driest month (with the least rainfall) is February (1.57").

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Average rainfall days in September
Port Clinton, OH

Average rainfall days in September - Port Clinton, OH
  • Average rainfall days in September: 14.2 days

The month with the highest number of rainy days is May (18 days).
The month with the least rainy days is February (7.6 days).

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Average snowfall in September
Port Clinton, OH

Average snowfall in September - Port Clinton, OH
  • Average snowfall in September: 0"

The month with the highest snowfall is February (3.54").
The months with the least snowfall are June, July, August, September and October (0").

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Average snowfall days in September
Port Clinton, OH

Average snowfall days in September - Port Clinton, OH
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (13.4 days).
The months with the least snowfall days are June, July, August, September and October (0 days).

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Average sea temperature in September
Port Clinton, OH

Average sea temperature in September - Port Clinton, OH
  • Average sea temperature in September: 71.3°F

The best month for swimming (with the highest average sea temperature) is July (76.6°F).
The coldest month (with the lowest average sea temperature) is February (32.3°F).

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Average daylight in September /
Average sunshine in September
Port Clinton, OH

Average daylight in September / Average sunshine in September - Port Clinton, OH
  • Average daylight in September: 12h and 28min

The month with the longest days is June (Average daylight: 15h and 8min).
The month with the shortest days is December (Average daylight: 9h and 14min).

  • Average sunshine in September: 8h 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: 3h and 12min).

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Average sunshine days in September
Port Clinton, OH

Average sunshine days in September - Port Clinton, OH
  • Average sunshine days in September: 13.5 days

The month with the most sunshine days is September (13.5 days).
The month with the least sunshine days is February (9 days).

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Average UV index in September
Port Clinton, OH

Average UV index in September - Port Clinton, OH
  • Average UV index in September: 4

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

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Average cloud cover in September
Port Clinton, OH

Average cloud cover in September - Port Clinton, OH
  • Average cloud cover in September: 34

The month with the most cloud cover is January (Cloud cover 67).
The months with the least cloud cover are July and August (Cloud cover 29).

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Average visibility in September
Port Clinton, OH

Average visibility in September - Port Clinton, OH
  • Average visibility in September: 6mi

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

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