September weather forecast
Johnson City, TN

The front entrance to the Public Library in Johnson City, Tennessee
The front entrance to the Public Library in Johnson City, Tennessee

Weather in September

The first month of the autumn, September, is still a warm month in Johnson City, Tennessee, with an average temperature fluctuating between 54.9°F (12.7°C) and 77.5°F (25.3°C).

Temperature

In September, the average high-temperature is almost the same as in August - a still moderately hot 77.5°F (25.3°C). In September, in Johnson City, the average low-temperature is 54.9°F (12.7°C).

Humidity

In September, the average relative humidity in Johnson City, Tennessee, is 77%.

Rainfall

The month with the least rainfall in Johnson City is September, when the rain falls for 15.5 days and typically collects 1.77" (45mm) of precipitation.

Snowfall

In Johnson City, snow does not fall in May through September.

Daylight

In Johnson City, the average length of the day in September is 12h and 24min.
On the first day of the month, sunrise is at 7:01 am and sunset at 7:57 pm. On the last day of September, sunrise is at 7:23 am and sunset at 7:14 pm EDT.

Sunshine

In September, the average sunshine in Johnson City is 8.7h.

UV index

In Johnson City, the average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for the average person.
Note: The average daily UV index of 4 in September transform into the following instructions:
Take precautions - Protection against sun damage is advised. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. 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.
[Resources]

FAQ

What is the average humidity in September in Johnson City?

In Johnson City, the average relative humidity in September is 77%.

What is the driest month in Johnson City?

The month with the least rainfall is September, when the rain falls for 15.5 days and typically collects 1.77" (45mm) of precipitation.

How many days does it rain in September in Johnson City?

In Johnson City, Tennessee, in September, it is raining for 15.5 days, with typically 1.77" (45mm) of accumulated precipitation.

When it does not snow in Johnson City?

May through September are months without snowfall.

Does it snow in Johnson City in September?

In Johnson City, in September, it doesn't snow. In October, it regularly snows.

How many hours of daylight does Johnson City have in September?

In September, the average day length in Johnson City, Tennessee, is 12h and 24min.

What time are sunrise and sunset in September in Johnson City?

In September, on the first day of the month, sunrise is at 7:01 am and sunset at 7:57 pm. On the last day of the month, in Johnson City, sunrise is at 7:23 am and sunset at 7:14 pm EDT.

How long on average sun shines in September in Johnson City?

In September, the average sunshine duration in Johnson City, Tennessee, is 8.7h.

How high is the UV index in September in Johnson City?

The average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a medium health risk from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Johnson City, TN

Average temperature in September - Johnson City, TN
  • Average high temperature in September: 77.5°F

The warmest month (with the highest average high temperature) is July (83.3°F).
The month with the lowest average high temperature is January (41.5°F).

  • Average low temperature in September: 54.9°F

The month with the highest average low temperature is July (60.6°F).
The coldest month (with the lowest average low temperature) is January (26.6°F).

[Resources]

Average pressure in September
Johnson City, TN

Average pressure in September - Johnson City, TN
  • Average pressure in September: 30.06"Hg

The month with the highest atmospheric pressure is November (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.99"Hg).

[Resources]

Average wind speed in September
Johnson City, TN

Average wind speed in September - Johnson City, TN
  • Average wind speed in September: 4mph

The windiest month (with the highest average wind speed) is April (6.6mph).
The calmest month (with the lowest average wind speed) is August (3.7mph).

[Resources]

Average humidity in September
Johnson City, TN

Average humidity in September - Johnson City, TN
  • Average humidity in September: 77%

The months with the highest relative humidity are February and December (79%).
The month with the lowest relative humidity is November (75%).

[Resources]

Average rainfall in September
Johnson City, TN

Average rainfall in September - Johnson City, TN
  • Average rainfall in September: 1.77"

The wettest month (with the highest rainfall) is February (3.27").
The driest month (with the least rainfall) is September (1.77").

[Resources]

Average rainfall days in September
Johnson City, TN

Average rainfall days in September - Johnson City, TN
  • Average rainfall days in September: 15.5 days

The month with the highest number of rainy days is July (19.6 days).
The month with the least rainy days is November (11.2 days).

[Resources]

Average snowfall in September
Johnson City, TN

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

The month with the highest snowfall is December (3.74").
The months with the least snowfall are May, June, July, August and September (0").

[Resources]

Average snowfall days in September
Johnson City, TN

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

The month with the highest number of snowfall days is January (8.9 days).
The months with the least snowfall days are June, July, August and September (0 days).

[Resources]

Average daylight in September /
Average sunshine in September
Johnson City, TN

Average daylight in September / Average sunshine in September - Johnson City, TN
  • Average daylight in September: 12h and 24min

The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 44min).

  • Average sunshine in September: 8h and 42min

The month with the most sunshine is June (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 5h and 0min).

[Resources]

Average sunshine days in September
Johnson City, TN

Average sunshine days in September - Johnson City, TN
  • Average sunshine days in September: 11.9 days

The month with the most sunshine days is October (16.5 days).
The month with the least sunshine days is July (8.3 days).

[Resources]

Average UV index in September
Johnson City, TN

Average UV index in September - Johnson City, TN
  • Average UV index in September: 4

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

[Resources]

Average cloud cover in September
Johnson City, TN

Average cloud cover in September - Johnson City, TN
  • Average cloud cover in September: 33

The month with the most cloud cover is February (Cloud cover 52).
The months with the least cloud cover are June and August (Cloud cover 31).

[Resources]

Average visibility in September
Johnson City, TN

Average visibility in September - Johnson City, TN
  • Average visibility in September: 5mi

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

[Resources]

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location
* you will be automatically redirected to the weather forecast for your location