Johnson City
Tennessee, USA
Long-term weather forecast
Long-term weather forecast

August 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
Agosto, the last month of the summer, in Johnson City, is another warm month, with average temperature ranging between min 63°F (17.2°C) and max 84.9°F (29.4°C).

Temperature

In Johnson City, the average high-temperature in Agosto is almost the same as in Julio - a moderately hot 84.9°F (29.4°C). In Agosto, the average low-temperature is 63°F (17.2°C).

Heat index

In Agosto, the average heat index is estimated at a torrid 95°F (35°C). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature', 'real feel', 'apparent temperature', or 'feels like', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. Additional factors like metabolic differences, wind, clothing, and activity influence one's weather impression. Be aware that direct exposure to sunlight increases heat impact, and may raise the heat index additionally, by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.
The human body normally cools itself by perspiration, as evaporated sweat carries heat away from the body. With a lot of moisture in the air, the evaporation process is not as effective, and the body does not cool down as efficiently, creating a perception of overheating. When heat gain exceeds the level the body can remove, body temperature begins to rise, and heat-related illnesses and disorders may develop.

Humidity

Months with the highest humidity in Johnson City are Agosto and Septiembre, with an average relative humidity of 76.5%.

Rainfall

In Johnson City, in Agosto, 4.15" (105.4mm) of precipitation is typically accumulated. During the entire year, Johnson City aggregates up to 45.22" (1148.6mm) of precipitation.

Snowfall

In Johnson City snow does not fall in Mayo through Octubre.

Daylight

In Johnson City, the average length of the day in Agosto is 13.5h.

What is the temperature in Agosto in Johnson City?

In Agosto, in Johnson City, the average high-temperature is 84.9°F (29.4°C), and the average low-temperature is 63°F (17.2°C). The average heat index (a.k.a. 'apparent temperature', 'real feel'), that takes the relative humidity and factores it into the air temperature reading, in Agosto is appraised at 95°F (35°C).

What is the most humid month in Johnson City?

Months with the highest humidity are Agosto and Septiembre, with an average relative humidity of 76.5%.

What is the average humidity in Agosto in Johnson City?

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

How much does it rain in Johnson City in Agosto?

In Johnson City, Tennessee, in Agosto, 4.15" (105.4mm) of precipitation is typically accumulated.

When it does not snow in Johnson City?

Mayo through Octubre are months without snowfall.

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

The average length of the day in Agosto in Johnson City, Tennessee, is 13.5h.
Average temperature in August - Johnson City, TN
  • Average high temperature in August: 85°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 August: 63°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 August - Johnson City, TN
  • Average humidity in August: 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 August - Johnson City, TN
  • Average rainfall in August: 4.2"

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 August - Johnson City, TN
  • Average snowfall in August: 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 August - Johnson City, TN
  • Average daylight in August: 13.5h

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