May weather forecast and climate
Knoxville, AL

Weather in May

The last month of the spring, May, is also a moderately hot month in Knoxville, Alabama, with average temperature ranging between min 62.2°F (16.8°C) and max 83.5°F (28.6°C).

Temperature

In Knoxville, the average high-temperature marginally rises, from a moderately hot 75.6°F (24.2°C) in April, to a still warm 83.5°F (28.6°C). The average low-temperature, in Knoxville, Alabama, is 62.2°F (16.8°C).

Heat index

The average heat index is appraised at a hot 90.3°F (32.4°C). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
Note that heat index values are valued for light wind and location in the shade. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like', 'apparent temperature', 'real feel', or 'felt air temperature', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. This effect is individual, with diverse people perceiving weather differently for numerous reasons (metabolic differences, pregnancy, clothing), and activity. 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. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.

Humidity

In Knoxville, the average relative humidity is 73%.

Rainfall

In May, the rain falls for 14.2 days. Throughout May, 2.8" (71mm) of precipitation is accumulated. Throughout the year, in Knoxville, there are 166.5 rainfall days, and 39.41" (1001mm) of precipitation is accumulated.

Snowfall

In Knoxville, Alabama, snow does not fall in March through November.

Daylight

In Knoxville, the average length of the day in May is 13.9h.

Sunshine

In Knoxville, the average sunshine in May is 9.9h.

UV index

In May, the average daily maximum UV index is 6. A UV Index estimate of 6 to 7 represents a high health hazard from unsafe exposure to the UV radiation for the average person.
Note: The daily maximum UV index of 6 in May interpret into the following advice:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. A wide-brim hat offers excellent sun protection for 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.
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FAQ

What is the temperature in May in Knoxville?

In Knoxville, in May, the average high-temperature is 83.5°F (28.6°C), and the average low-temperature is 62.2°F (16.8°C). In May, the average heat index (a.k.a. 'feels like', 'felt air temperature'), that combines air temperature and relative humidity, is calculated to 90.3°F (32.4°C).

What is the average humidity in May in Knoxville?

In May, the average relative humidity in Knoxville, Alabama, is 73%.

How many days does it rain in May in Knoxville?

In Knoxville, in May, during 14.2 rainfall days, 2.8" (71mm) of precipitation is typically accumulated.

When it does not snow in Knoxville?

In Knoxville, Alabama, snow does not fall in March through November.

What is the average length of the day in May in Knoxville?

In Knoxville, Alabama, the average length of the day in May is 13.9h.

How long on average sun shines in May in Knoxville?

In May, the average sunshine is 9.9h.

How high is the UV index in May in Knoxville?

In Knoxville, Alabama, the average daily maximum UV index in May is 6. A UV Index value of 6 to 7 symbolizes a high health threat from unprotected exposure to the UV radiation.

Average temperature in May
Knoxville, AL

Average temperature in May - Knoxville, AL
  • Average high temperature in May: 83.5°F

The warmest month (with the highest average high temperature) is July (91.9°F).
The month with the lowest average high temperature is January (52.9°F).

  • Average low temperature in May: 62.2°F

Months with the highest average low temperature are July and August (71.6°F).
The coldest month (with the lowest average low temperature) is January (37.4°F).

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Average pressure in May
Knoxville, AL

Average pressure in May - Knoxville, AL
  • Average pressure in May: 30"

The month with the highest atmospheric pressure is January (30.16").
The month with the lowest atmospheric pressure is June (29.97").

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Average wind speed in May
Knoxville, AL

Average wind speed in May - Knoxville, AL
  • Average wind speed in May: 5.7mph

The windiest month (with the highest average wind speed) is February (7.2mph).
The calmest month (with the lowest average wind speed) is August (4.5mph).

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Average humidity in May
Knoxville, AL

Average humidity in May - Knoxville, AL
  • Average humidity in May: 73%

The month with the highest relative humidity is December (80%).
The month with the lowest relative humidity is October (69%).

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Average rainfall in May
Knoxville, AL

Average rainfall in May - Knoxville, AL
  • Average rainfall in May: 2.8"

The wettest month (with the highest rainfall) is April (4.29").
The driest month (with the least rainfall) is October (2.28").

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Average rainfall days in May
Knoxville, AL

Average rainfall days in May - Knoxville, AL
  • Average rainfall days in May: 14.2 days

The month with the highest number of rainy days is July (20.6 days).
The month with the least rainy days is November (8.5 days).

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Average snowfall in May
Knoxville, AL

Average snowfall in May - Knoxville, AL
  • Average snowfall in May: 0"

The month with the highest snowfall is January (0.55").
Months with the least snowfall are March, April, May, June, July, August, September, October and November (0").

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Average snowfall days in May
Knoxville, AL

Average snowfall days in May - Knoxville, AL
  • Average snowfall days in May: 0 days

Months with the highest number of snowfall days are January and February (0.8 days).
Months with the least snowfall days are April, May, June, July, August, September and October (0 days).

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Average daylight in May /
Average sunshine in May
Knoxville, AL

Average daylight in May / Average sunshine in May - Knoxville, AL
  • Average daylight in May: 13.9h

The month with the longest days is June (Average daylight: 14.3h).
The month with the shortest days is December (Average daylight: 10h).

  • Average sunshine in May: 9.9h

The month with the most sunshine is June (Average sunshine: 10.5h).
Months with the least sunshine are February and December (Average sunshine: 4.8).

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Average sunshine days in May
Knoxville, AL

Average sunshine days in May - Knoxville, AL
  • Average sunshine days in May: 15.3 days

The month with the most sunshine days is October (20.5 days).
The month with the least sunshine days is July (8.8 days).

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Average UV index in May
Knoxville, AL

Average UV index in May - Knoxville, AL
  • Average UV index in May: 6

Months with the highest UV index are June, July and August (UV index 7).
Months with the lowest UV index are January, February and December (UV index 3).

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Average cloud cover in May
Knoxville, AL

Average cloud cover in May - Knoxville, AL
  • Average cloud cover in May: 34

Months with the most cloud cover are February and December (Cloud cover 48).
The month with the least cloud cover is September (Cloud cover 29).

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Average visibility in May
Knoxville, AL

Average visibility in May - Knoxville, AL
  • Average visibility in May: 6mi

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

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