September weather forecast and climate
Johnson City, TN

The front entrance to the Public Library in Johnson City, Tennessee, with flags flying on either side of the main entrance
The front entrance to the Public Library in Johnson City, Tennessee, with flags flying on either side of the main entrance
The first month of the autumn, September, is also a warm month in Johnson City, Tennessee, with average temperature fluctuating between 79°F (26.1°C) and 55°F (12.8°C).

Temperature

In Johnson City, the average high-temperature is 79°F (26.1°C), and the average low-temperature is 55°F (12.8°C).

Humidity

August and September, with an average relative humidity of 76.5%, are most humid months.

Rainfall

In Johnson City, 3" (77mm) of precipitation is typically accumulated. During the entire year, Johnson City aggregates up to 45.2" (1148.6mm) of precipitation.

Snowfall

Throughout the year, in Johnson City, Tennessee, 15.6" (396.3mm) of snow is accumulated.

Daylight

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

What is the temperature in September in Johnson City?

In September, the average high-temperature is 79°F (26.1°C), and the average low-temperature is 55°F (12.8°C).

What is the most humid month in Johnson City?

Months with the highest humidity in Johnson City, Tennessee, are August and September, with an average relative humidity of 76.5%.

What is the average humidity in September in Johnson City?

In Johnson City, the average relative humidity in September is 76.5%.

How much does it rain in Johnson City in September?

Throughout September, 3" (77mm) of precipitation is accumulated.

What is the average length of the day in September in Johnson City?

The average length of the day in September in Johnson City, Tennessee, is 12.4h.
Average temperature in September - Johnson City, TN
  • Average high temperature in September: 79°F

The warmest month (with the highest average high temperature) is July (86°F).
The month with the lowest average high temperature is January (45°F).

  • Average low temperature in September: 55°F

The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (25°F).

Average humidity in September - Johnson City, TN
  • Average humidity in September: 76.5%

Months with the highest relative humidity are August and September (76.5%).
The month with the lowest relative humidity is January (59%).

Average rainfall in September - Johnson City, TN
  • Average rainfall in September: 3"

The wettest month (with the highest rainfall) is July (5.4").
The driest month (with the lowest rainfall) is October (2.4").

Average snowfall in September - Johnson City, TN
  • Average snowfall in September: 0"

The month with the highest snowfall is January (5.2").
Months with the lowest snowfall are May, June, July, August, September and October (0").

Average daylight in September - Johnson City, TN
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 14.6h).
The month with shortest days is December (Average daylight: 9.7h).

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