September Weather forecast - Autumn forecast

Weather in September
Frequently asked questions
Average temperature in September
Average pressure in September
Average wind speed in September
Average humidity in September
Average rainfall in September
Average rainfall days in September
Average snowfall in September
Average snowfall days in September
Average daylight in September
Average sunshine in September
Average sunshine days in September
Average UV index in September
Average cloud cover in September
Average visibility in September

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

Weather in September

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

Temperature

In September, the average high-temperature is essentially 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 Johnson City, the average relative humidity in September is 77%.

Rainfall

September is the month with the least rainfall in Johnson City. Rain falls for 15.5 days and accumulates 1.77" (45mm) of precipitation.

Snowfall

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

Daylight

In September, the average length of the day is 12h and 24min.
On the first day of September, sunrise is at 7:00 am and sunset at 7:57 pm. On the last day of the month, sunrise is at 7:23 am and sunset at 7:15 pm EDT.

Sunshine

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

UV index

In September, the average daily maximum UV index in Johnson City is 4. A UV Index reading of 3 to 5 represents a medium vulnerability 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 sunburn is recommended. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.

[Resources]

FAQ

What is the temperature in September in Johnson City?

In September, the average high-temperature is 77.5°F (25.3°C), and the average low-temperature is 54.9°F (12.7°C). The average heat index (a.k.a. 'feels like', 'felt air temperature'), which calculates the temperature value influenced by the moisture in the air, in August is computed to be 89.6°F (32°C).

What is the average humidity in September in Johnson City?

The average relative humidity in September in Johnson City is 77%.

What is the driest month in Johnson City?

September is the month with the least rainfall in Johnson City, Tennessee. Rain falls for 15.5 days and accumulates 1.77" (45mm) of precipitation.

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

In Johnson City, Tennessee, in September, during 15.5 rainfall days, 1.77" (45mm) of precipitation is typically accumulated.

When it does not snow in Johnson City?

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

Does it snow in Johnson City in September?

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

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

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

When is the sunrise / sunset in September in Johnson City?

In September, on the first day of the month, sunrise is at 7:00 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 7:15 pm EDT.

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

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

What is the UV index reading in September in Johnson City?

In September, the average daily maximum UV index is 4. A UV Index value of 3 to 5 symbolizes a moderate health threat from unprotected exposure to UV radiation.

Today

Tomorrow

Long-term

Year J F M A M J J A September O N D

Aug

September

Oct

Average high temperature

82.6°F 28.1°C

77.5°F 25.3°C

65.8°F 18.8°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

4mph 6.4km/h

4.2mph 6.8km/h

5.4mph 8.7km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average snowfall

Average snowfall days

Average daylight

Average sunshine

Average sunshine days

9.8

11.9

16.5

Average UV index

Average cloud cover

Average visibility

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: 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: 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: 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: 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: 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: 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: 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: 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: 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: 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: 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: 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]

September weather forecast
Johnson City, TN

Contents