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

What is the temperature in September in Johnson City?

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).

How much does it rain in Johnson City in September?

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