September weather forecastPort Clinton, OH
September
Weather in September
September brings the onset of fall, with a noticeable drop in days' temperature. The rainfall declines to 2.64" (67mm), promoting a more comfortable climate compared to previous months. With reduced daylight hours, evenings start to feel longer, calling for light sweaters and jackets. Meanwhile, sunbathers and swimmers continue relishing the late summer's warmth at the shores of Lake Erie. The lower tourist influx makes it a serene time to visit Port Clinton if one enjoys quieter surroundings.Temperature
Upon the beginning of September, Port Clinton's high-temperatures register at an agreeable 70.9°F (21.6°C), closely mirroring the preceding month. An average temperature of 60.3°F (15.7°C) is recorded during the nights in September.Humidity
The average relative humidity in September is 77%.Rainfall
In Port Clinton, in September, it is raining for 14.2 days, with typically 2.64" (67mm) of accumulated precipitation. Throughout the year, there are 163.4 rainfall days, and 34.92" (887mm) of precipitation is accumulated.Snowfall
In Port Clinton, snow does not fall in June through October.Ocean temperature
In September, the average ocean temperature is 71.2°F (21.8°C).Note: Swimming in 71.2°F (21.8°C) is not a pleasurable activity for the majority of people. Breathing becomes increasingly challenging as water temperature descends from 69.8°F (21°C) to 59°F (15°C).
Daylight
In September, the average length of the day is 12h and 28min.On the first day of September, sunrise is at 6:58 am and sunset at 8:04 pm. On the last day of the month, sunrise is at 7:28 am and sunset at 7:14 pm EDT.
Sunshine
The average sunshine in September is 8h.UV index
In September, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for ordinary individuals.Note: An average maximum UV index of 4 in September leads to these recommendations:
Put precautions into practice - Ensuring skin and eye safety is a necessity. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage. Attention! UV radiation is ramped up when reflecting off sand and water surfaces.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
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).
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).
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).
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%).
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").
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).
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").
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).
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).
Average daylight in September /
Average sunshine in September
Port Clinton, OH
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- 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).
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).
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).
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).
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).
