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

September weather forecast and climate
Cleveland, OH

A view of the Veterans Memorial Bridge on the Cuyahoga River, in Cleveland, Ohio, with a view of the old lift bridge and city buildings out far
A view of the Veterans Memorial Bridge on the Cuyahoga River, in Cleveland, Ohio, with a view of the old lift bridge and city buildings out far
September, the first month of the autumn, in Cleveland, is still a warm month, with average temperature ranging between max 73.9°F (23.3°C) and min 55.9°F (13.3°C).

Temperature

In Cleveland, the average high-temperature in September marginally drops, from a moderately hot 80.8°F (27.1°C) in August, to a still warm 73.9°F (23.3°C). In Cleveland, the average low-temperature is 55.9°F (13.3°C).

Humidity

In September, the average relative humidity in Cleveland is 73.7%.

Rainfall

The month with the most rainfall in Cleveland, Ohio, is September when the rain falls for 10 days and typically aggregates up to 3.8" (96.8mm) of precipitation.

Snowfall

May through September are months without snowfall.

Ocean temperature

In Cleveland, the average water temperature is 71.2°F (21.8°C).
Note: For most, swimming in 71.2°F (21.8°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 Cleveland, the average length of the day is 12.5h.

Sunshine

The average sunshine in Cleveland is 7.3h.

UV index

The average daily maximum UV index in September is 6. 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 6 in September interpret into the following advice:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Beware! The strength of the UV rays is significantly increased by the reflection of the water and sand.

What is the temperature in September in Cleveland?

In September, the average high-temperature is 73.9°F (23.3°C), and the average low-temperature is 55.9°F (13.3°C).

What is the average humidity in September in Cleveland?

In September, the average relative humidity in Cleveland is 73.7%.

How many days does it rain in September in Cleveland?

In Cleveland, in September, during 10 rainfall days, 3.8" (96.8mm) of precipitation is typically accumulated.

What is the rainiest month in Cleveland?

September is the month with the most rainfall in Cleveland. Rain falls for 10 days and accumulates 3.8" (96.8mm) of precipitation.

Does it snow in Cleveland in September?

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

When it does not snow in Cleveland?

In Cleveland snow does not fall in May through September.

What is the ocean temperature in September in Cleveland?

In September, the average ocean temperature is 71.2°F (21.8°C). For swimming, a surface water temperature of 71.2°F (21.8°C) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 69.8°F (21°C).

What is the average length of the day in September in Cleveland?

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

How many hours of sunshine does Cleveland have in September?

The average sunshine in September is 7.3h.

What is the UV index reading in September in Cleveland?

In September, the average daily maximum UV index in Cleveland, Ohio, is 6. A UV Index of 6 to 7 symbolizes a high hazard to health from unprotected exposure to the UV radiation.
Average temperature in September - Cleveland, OH
  • Average high temperature in September: 73.9°F

The warmest month (with the highest average high temperature) is July (82.6°F).
The month with the lowest average high temperature is January (34.4°F).

  • Average low temperature in September: 56°F

The month with the highest average low temperature is July (64.3°F).
The coldest month (with the lowest average low temperature) is January (21.7°F).

Average humidity in September - Cleveland, OH
  • Average humidity in September: 73.7%

The month with the highest relative humidity is December (74.1%).
The month with the lowest relative humidity is April (66.1%).

Average rainfall in September - Cleveland, OH
  • Average rainfall in September: 3.8"

The wettest month (with the highest rainfall) is September (3.8").
The driest month (with the lowest rainfall) is February (2.3").

Average rainfall days in September - Cleveland, OH
  • Average rainfall days in September: 10 days

The month with the highest number of rainy days is January (17.1 days).
The month with the lowest number of rainy days is August (9.8 days).

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

The month with the highest snowfall is January (18.7").
Months with the lowest snowfall are May, June, July, August and September (0").

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

The month with the highest number of snowfall days is January (13.5 days).
Months with the lowest number of snowfall days are May, June, July, August and September (0 days).

Average sea temperature in September - Cleveland, OH
  • Average sea temperature in September: 71.2°F

The best month for swimming (with the highest average sea temperature) is August (76.3°F).
The coldest month (with the lowest average sea temperature) is February (33.2°F).

Average daylight in September / Average sunshine in September - Cleveland, OH
  • Average daylight in September: 12.5h

The month with the longest days is June (Average daylight: 15.1h).
The month with shortest days is December (Average daylight: 9.2h).

  • Average sunshine in September: 7.3h

The month with most sunshine is July (Average sunshine: 9.9h).
The month with least sunshine is December (Average sunshine: 2.2h).

Average UV index in September - Cleveland, OH
  • Average UV index in September: 6

Months with the highest UV index are June and July (UV index 9).
The month with the lowest UV index is December (UV index 1).