May weather forecast and climate
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
May, the last month of the spring, in Johnson City, is a warm month, with temperature in the range of an average high of 73.4°F (23°C) and an average low of 51.8°F (11°C).

Temperature

In May, the average high-temperature marginally rises, from a comfortable 64.9°F (18.3°C) in April, to a warm 73.4°F (23°C). In Johnson City, the average low-temperature is 51.8°F (11°C).

Humidity

In Johnson City, Tennessee, the average relative humidity in May is 78%.

Rainfall

In Johnson City, it is raining for 19.4 days, with typically 3.07" (78mm) of accumulated precipitation. Throughout the year, in Johnson City, Tennessee, there are 187.8 rainfall days, and 32.76" (832mm) of precipitation is accumulated.

Snowfall

In Johnson City snow does not fall through September.

Daylight

The average length of the day in Johnson City is 14.1h.

Sunshine

The average sunshine in May is 9.9h.

UV index

The average daily maximum UV index in May is 5. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to the UV radiation for average individuals.
Note: In May, the average maximum UV index of 5 translate into the following recommendations:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. 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. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.

What is the temperature in May in Johnson City?

In May, in Johnson City, the average high-temperature is 73.4°F (23°C), and the average low-temperature is 51.8°F (11°C).

What is the average humidity in May in Johnson City?

The average relative humidity in May in Johnson City, Tennessee, is 78%.

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

In May, the rain falls for 19.4 days. Throughout May, 3.07" (78mm) of precipitation is accumulated.

Does it snow in Johnson City in May?

In May, in Johnson City, it doesn't snow. April is the latest month when it typically snows.

When it does not snow in Johnson City?

May through September are months without snowfall in Johnson City.

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

In May, the average length of the day is 14.1h.

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

The average sunshine in May in Johnson City is 9.9h.

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

In Johnson City, Tennessee, the average daily maximum UV index in May is 5. A UV Index estimate of 3 to 5 represents a moderate health threat from unprotected exposure to the UV radiation.
Average temperature in May - Johnson City, TN
  • Average high temperature in May: 73.4°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 May: 51.8°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).

Average pressure in May - Johnson City, TN
  • Average pressure in May: 30.03"

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

Average wind speed in May - Johnson City, TN
  • Average wind speed in May: 5.2mph

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).

Average humidity in May - Johnson City, TN
  • Average humidity in May: 78%

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

Average rainfall in May - Johnson City, TN
  • Average rainfall in May: 3.07"

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

Average rainfall days in May - Johnson City, TN
  • Average rainfall days in May: 19.4 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).

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

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

Average snowfall days in May - Johnson City, TN
  • Average snowfall days in May: 0.1 days

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

Average daylight in May / Average sunshine in May - Johnson City, TN
  • Average daylight in May: 14.1h

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

  • Average sunshine in May: 9.9h

The month with the most sunshine is June (Average sunshine: 10.6h).
The month with the least sunshine is January (Average sunshine: 5h).

Average sunshine days in May - Johnson City, TN
  • Average sunshine days in May: 9.2 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).

Average UV index in May - Johnson City, TN
  • Average UV index in May: 5

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

Average cloud cover in May - Johnson City, TN
  • Average cloud cover in May: 36

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

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

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