Cincinnati
Ohio, USA
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Cincinnati, OH

A beautiful park in spring next to the John A Roebling suspension bridge in Cincinnati, Ohio
A beautiful park in spring next to the John A Roebling suspension bridge in Cincinnati, Ohio
September, the first month of the autumn, in Cincinnati, is still a warm month, with average temperature fluctuating between 78.1°F (25.6°C) and 57°F (13.9°C).

Temperature

In September, the average high-temperature slightly decreases, from a moderately hot 84.9°F (29.4°C) in August, to a still warm 78.1°F (25.6°C). The average low-temperature, in September, is 57°F (13.9°C).

Humidity

In Cincinnati, the average relative humidity is 72.7%.

Rainfall

The month with the least rainfall in Cincinnati is September when the rain falls for 7.7 days and typically collects 2.6" (66.8mm) of precipitation.

Snowfall

In Cincinnati snow does not fall in May through September.

Daylight

The average length of the day in September is 12.4h.

Sunshine

The average sunshine in September is 7.8h.

UV index

In Cincinnati, Ohio, the average daily maximum UV index is 7. A UV Index value of 6 to 7 symbolizes a high health hazard from the exposure to the Sun's UV rays for average individuals.
Note: The daily maximum UV index of 7 in September interpret into the following advice:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. A wide-brim hat offers excellent sun protection for 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.

What is the temperature in September in Cincinnati?

In September, in Cincinnati, the average high-temperature is 78.1°F (25.6°C), and the average low-temperature is 57°F (13.9°C).

What is the average humidity in September in Cincinnati?

The average relative humidity in September in Cincinnati, Ohio, is 72.7%.

How many days does it rain in September in Cincinnati?

In Cincinnati, in September, during 7.7 rainfall days, 2.6" (66.8mm) of precipitation is typically accumulated.

What is the driest month in Cincinnati?

The month with the least rainfall in Cincinnati is September when the rain falls for 7.7 days and typically collects 2.6" (66.8mm) of precipitation.

Does it snow in Cincinnati in September?

In Cincinnati, Ohio, in September, it doesn't snow. In October, it regularly snows.

When it does not snow in Cincinnati?

In Cincinnati, Ohio, snow does not fall in May through September.

How many hours of daylight does Cincinnati have in September?

In September, the average length of the day in Cincinnati, Ohio, is 12.4h.

How many hours of sunshine does Cincinnati have in September?

The average sunshine in September in Cincinnati is 7.8h.

What is the UV index reading in September in Cincinnati?

The average daily maximum UV index in September in Cincinnati, Ohio, is 7. A UV Index estimate of 6 to 7 represents a high hazard to health from the exposure to the Sun's UV radiation.
Average temperature in September - Cincinnati, OH
  • Average high temperature in September: 78.1°F

The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is January (38.7°F).

  • Average low temperature in September: 57°F

The month with the highest average low temperature is July (66.1°F).
The coldest month (with the lowest average low temperature) is January (23°F).

Average humidity in September - Cincinnati, OH
  • Average humidity in September: 72.7%

The month with the highest relative humidity is December (73.8%).
The month with the lowest relative humidity is April (62.8%).

Average rainfall in September - Cincinnati, OH
  • Average rainfall in September: 2.6"

The wettest month (with the highest rainfall) is May (4.9").
The driest month (with the lowest rainfall) is September (2.6").

Average rainfall days in September - Cincinnati, OH
  • Average rainfall days in September: 7.7 days

The month with the highest number of rainy days is May (12.8 days).
The month with the lowest number of rainy days is September (7.7 days).

Average snowfall in September - Cincinnati, OH
  • Average snowfall in September: 0"

Months with the highest snowfall are January and February (6.5").
Months with the lowest snowfall are May, June, July, August and September (0").

Average snowfall days in September - Cincinnati, OH
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (6.5 days).
Months with the lowest number of snowfall days are June, July, August and September (0 days).

Average daylight in September / Average sunshine in September - Cincinnati, OH
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 14.9h).
The month with shortest days is December (Average daylight: 9.5h).

  • Average sunshine in September: 7.8h

The month with most sunshine is June (Average sunshine: 9.2h).
The month with least sunshine is December (Average sunshine: 3.2h).

Average UV index in September - Cincinnati, OH
  • Average UV index in September: 7

Months with the highest UV index are June and July (UV index 9).
Months with the lowest UV index are January, November and December (UV index 2).