September weather forecast
Harbor Heights, TN

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Weather in September

The first month of the autumn, September, is also a moderately hot month in Harbor Heights, Tennessee, with temperature in the range of an average high of 82.2°F (27.9°C) and an average low of 61.2°F (16.2°C).

Temperature

Harbor Heights's shift into September sets the average high-temperature at a warm 82.2°F (27.9°C), a figure that deviates only slightly from August's 87.4°F (30.8°C). Throughout September nights, Harbor Heights experiences a consistent temperature average of 61.2°F (16.2°C).

Heat index

The heat index in September is estimated at a hot 87.8°F (31°C). If one endures exposure and continues to be active, it might result in tiredness and heat cramps.
Research indicates the heat index considers values in shaded locales and with light winds. When exposed to the direct sun, the heat index may augment by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is an estimation of the warmth sensation when considering humidity levels. The impression of weather on a person can be swayed by additional aspects, including metabolic variations, pregnancy, and activity levels. When directly under the sun, the weather's impact can intensify, possibly boosting the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. Kids are usually in more danger than grown-ups as they tend to sweat less. Plus, their bigger skin surface in relation to their small frames and increased heat generation due to their activity level make them more susceptible.

Humidity

In Harbor Heights, the average relative humidity in September is 75%.

Rainfall

September is the month with the least rainfall in Harbor Heights. Rain falls for 12.4 days and accumulates 2.48" (63mm) of precipitation.

Snowfall

May through October are months without snowfall.

Daylight

In Harbor Heights, the average length of the day in September is 12h and 23min.
On the first day of September in Harbor Heights, sunrise is at 7:13 am and sunset at 8:07 pm. On the last day of the month, sunrise is at 7:35 am and sunset at 7:25 pm EDT.

Sunshine

In September, the average sunshine in Harbor Heights is 8.5h.

UV index

In September, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for average individuals.
Note: During September, 5 as the daily maximum UV index converts into the following advice:
Safety measures are advised. Light-skinned individuals may experience burns in under half an hour. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. Enhance your sun protection with tightly woven, yet airy clothing.
Updated: Aug 31, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the temperature in September?

In Harbor Heights, in September, the average high-temperature is 82.2°F (27.9°C), and the average low-temperature is 61.2°F (16.2°C). The average heat index (a.k.a. 'real feel', 'apparent temperature'), which takes the relative humidity and factors it into the air temperature reading, in September is estimated at 87.8°F (31°C).

What is the average humidity in September?

In September, the average relative humidity is 75%.

What is the driest month?

September is the month with the least rainfall. Rain falls for 12.4 days and accumulates 2.48" (63mm) of precipitation.

How much does it rain in September?

In Harbor Heights, in September, it is raining for 12.4 days, with typically 2.48" (63mm) of accumulated precipitation.

When it does not snow?

May through October are months without snowfall.

How many hours of daylight does Harbor Heights have in September?

In Harbor Heights, the average day length in September is 12h and 23min.

What time are sunrise and sunset in September?

On the first day of September, sunrise is at 7:13 am and sunset at 8:07 pm. On the last day of the month, sunrise is at 7:35 am and sunset at 7:25 pm EDT.

How long on average sun shines in September?

In Harbor Heights, the average sunshine duration in September is 8.5h.

What is the UV index reading in September?

The average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a medium hazard to health from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Harbor Heights, TN

Average temperature in September - Harbor Heights, TN
  • Average high temperature in September: 82.2°F

The warmest month (with the highest average high temperature) is July (88.9°F).
The month with the lowest average high temperature is January (46.9°F).

  • Average low temperature in September: 61.2°F

The month with the highest average low temperature is July (66.9°F).
The coldest month (with the lowest average low temperature) is January (31.5°F).

Average pressure in September
Harbor Heights, TN

Average pressure in September - Harbor Heights, TN
  • Average pressure in September: 30.03"Hg

The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.98"Hg).

Average wind speed in September
Harbor Heights, TN

Average wind speed in September - Harbor Heights, TN
  • Average wind speed in September: 4.2mph

The windiest month (with the highest average wind speed) is February (6.6mph).
The calmest months (with the lowest average wind speed) are July and August (3.9mph).

Average humidity in September
Harbor Heights, TN

Average humidity in September - Harbor Heights, TN
  • Average humidity in September: 75%

The month with the highest relative humidity is December (80%).
The month with the lowest relative humidity is October (74%).

Average rainfall in September
Harbor Heights, TN

Average rainfall in September - Harbor Heights, TN
  • Average rainfall in September: 2.48"

The wettest month (with the highest rainfall) is December (4.21").
The driest month (with the least rainfall) is September (2.48").

Average rainfall days in September
Harbor Heights, TN

Average rainfall days in September - Harbor Heights, TN
  • Average rainfall days in September: 12.4 days

The month with the highest number of rainy days is July (19.2 days).
The month with the least rainy days is November (9.5 days).

Average snowfall in September
Harbor Heights, TN

Average snowfall in September - Harbor Heights, TN
  • Average snowfall in September: 0"

The month with the highest snowfall is February (0.94").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in September
Harbor Heights, TN

Average snowfall days in September - Harbor Heights, TN
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (2.9 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

Average daylight in September /
Average sunshine in September
Harbor Heights, TN

Average daylight in September / Average sunshine in September - Harbor Heights, TN
  • Average daylight in September: 12h and 2min

The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 48min).

  • Average sunshine in September: 8h and 3min

The month with the most sunshine is June (Average sunshine: 10h and 30min).
The month with the least sunshine is December (Average sunshine: 5h and 0min).

Average sunshine days in September
Harbor Heights, TN

Average sunshine days in September - Harbor Heights, TN
  • Average sunshine days in September: 15.7 days

The month with the most sunshine days is October (18.9 days).
The month with the least sunshine days is July (9 days).

Average UV index in September
Harbor Heights, TN

Average UV index in September - Harbor Heights, TN
  • Average UV index in September: 5

The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 2).

Average cloud cover in September
Harbor Heights, TN

Average cloud cover in September - Harbor Heights, TN
  • Average cloud cover in September: 32

The month with the most cloud cover is February (Cloud cover 51).
The month with the least cloud cover is June (Cloud cover 30).

Average visibility in September
Harbor Heights, TN

Average visibility in September - Harbor Heights, TN
  • Average visibility in September: 6mi

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

Harbor Heights, Tennessee, USA

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