May weather forecastHeiskell, TN
May
Weather in May
The last month of the spring, May, is a moderately hot month in Heiskell, Tennessee, with an average temperature fluctuating between 55.9°F (13.3°C) and 78.4°F (25.8°C).Temperature
In Heiskell, stepping into May brings a temperature increase, moving up from April's agreeable 69.3°F (20.7°C) to a warm 78.4°F (25.8°C). Heiskell documents a significant temperature variance in May, with the mean nighttime lows settling at a mild 55.9°F (13.3°C).Humidity
In Heiskell, the average relative humidity in May is 74%.Rainfall
In Heiskell, in May, it is raining for 14.9 days, with typically 2.13" (54mm) of accumulated precipitation. In Heiskell, Tennessee, during the entire year, the rain falls for 148.9 days and collects up to 29.57" (751mm) of precipitation.Snowfall
In Heiskell, snow does not fall in May through October.Daylight
In May, the average length of the day in Heiskell is 14h and 5min.On the first day of May in Heiskell, sunrise is at 6:42 am and sunset at 8:23 pm. On the last day of the month, sunrise is at 6:20 am and sunset at 8:47 pm EDT.
Sunshine
The average sunshine in May is 9.9h.UV index
May through August, with an average maximum UV index of 6, are months with the highest UV index in Heiskell. A UV Index estimate of 6 to 7 represents a high threat to health from exposure to the Sun's UV rays for average individuals.Note: In May, the maximum UV index of 6 translates into these guidelines:
Persist with safeguards and heed sun safety doctrines. Keeping sunburn at bay is of prime importance. Between 10 a.m. and 4 p.m., the Sun emits the most powerful UV radiation. Limit direct exposure to the Sun during these hours. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Heiskell, TN
- Average high temperature in May: 78.4°F
The warmest month (with the highest average high temperature) is July (88.9°F).
The month with the lowest average high temperature is January (44.8°F).
- Average low temperature in May: 55.9°F
The month with the highest average low temperature is July (66.7°F).
The coldest month (with the lowest average low temperature) is January (29.3°F).
Average pressure in May
Heiskell, TN
- Average pressure in May: 30.02"Hg
The months with the highest atmospheric pressure are January and November (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.98"Hg).
Average wind speed in May
Heiskell, TN
- Average wind speed in May: 4.9mph
The windiest month (with the highest average wind speed) is April (6mph).
The calmest month (with the lowest average wind speed) is August (3.8mph).
Average humidity in May
Heiskell, TN
- Average humidity in May: 74%
The months with the highest relative humidity are February and December (78%).
The month with the lowest relative humidity is August (70%).
Average rainfall in May
Heiskell, TN
- Average rainfall in May: 2.13"
The wettest month (with the highest rainfall) is February (3.66").
The driest month (with the least rainfall) is September (1.5").
Average rainfall days in May
Heiskell, TN
- Average rainfall days in May: 14.9 days
The month with the highest number of rainy days is July (16.2 days).
The month with the least rainy days is November (8.4 days).
Average snowfall in May
Heiskell, TN
- Average snowfall in May: 0"
The month with the highest snowfall is February (1.57").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in May
Heiskell, TN
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is January (3.8 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in May /
Average sunshine in May
Heiskell, TN
- Average daylight in May: 14h and 6min
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 48min).
- Average sunshine in May: 9h and 54min
The month with the most sunshine is June (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 4h and 54min).
Average sunshine days in May
Heiskell, TN
- Average sunshine days in May: 13.8 days
The month with the most sunshine days is October (20.5 days).
The month with the least sunshine days is July (12.9 days).
Average UV index in May
Heiskell, TN
- Average UV index in May: 6
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February and December (UV index 2).
Average cloud cover in May
Heiskell, TN
- Average cloud cover in May: 34
The month with the most cloud cover is February (Cloud cover 54).
The month with the least cloud cover is June (Cloud cover 28).
Average visibility in May
Heiskell, TN
- Average visibility in May: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
