May weather forecastDecatur, TN
May
Weather in May
May, the last month of the spring in Decatur, is a warm month, with an average temperature ranging between min 56.5°F (13.6°C) and max 77.7°F (25.4°C).Temperature
With the onset of May, Decatur's average high-temperature sees a modest rise, moving from April's agreeable 69.1°F (20.6°C) to a moderately hot 77.7°F (25.4°C). The nighttime temperature in Decatur dips to a mild 56.5°F (13.6°C) on average during May.Humidity
In May, the average relative humidity in Decatur is 77%.Rainfall
In Decatur, in May, it is raining for 17.2 days, with typically 3.03" (77mm) of accumulated precipitation. Throughout the year, there are 171.8 rainfall days, and 41.81" (1062mm) of precipitation is accumulated.Snowfall
In Decatur, snow does not fall in May through October.Daylight
In Decatur, the average length of the day in May is 14h and 3min.On the first day of the month, sunrise is at 6:46 am and sunset at 8:25 pm. On the last day of May, sunrise is at 6:25 am and sunset at 8:48 pm EDT.
Sunshine
The average sunshine in May in Decatur, Tennessee, is 9.8h.UV index
The months with the highest UV index in Decatur are May through August, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high health risk from exposure to the Sun's UV rays for ordinary individuals.Note: The maximum UV index of 6 during May translates into these guidelines:
Implement precautions and maintain sun safety methods. Avoidance of sunburn is demanded. Minimize exposure to direct sunlight and seek shade from 10 a.m. to 4 p.m., when UV radiation is most intense, but remember that shade structures may not offer complete protection. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Decatur, TN
- Average high temperature in May: 77.7°F
The warmest month (with the highest average high temperature) is July (87.6°F).
The month with the lowest average high temperature is January (45.5°F).
- Average low temperature in May: 56.5°F
The month with the highest average low temperature is July (65.8°F).
The coldest month (with the lowest average low temperature) is January (30.6°F).
Average pressure in May
Decatur, 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
Decatur, TN
- Average wind speed in May: 5.2mph
The windiest months (with the highest average wind speed) are February, March and April (6.5mph).
The calmest months (with the lowest average wind speed) are July and August (3.9mph).
Average humidity in May
Decatur, TN
- Average humidity in May: 77%
The month with the highest relative humidity is December (80%).
The months with the lowest relative humidity are June, August, October and November (75%).
Average rainfall in May
Decatur, TN
- Average rainfall in May: 3.03"
The wettest months (with the highest rainfall) are July and December (4.29").
The driest month (with the least rainfall) is September (2.32").
Average rainfall days in May
Decatur, TN
- Average rainfall days in May: 17.2 days
The month with the highest number of rainy days is July (18.3 days).
The month with the least rainy days is November (9.5 days).
Average snowfall in May
Decatur, TN
- Average snowfall in May: 0"
The month with the highest snowfall is January (1.02").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in May
Decatur, TN
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is January (4.8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Decatur, TN
- Average daylight in May: 14h and 6min
The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 48min).
- Average sunshine in May: 9h and 48min
The months with the most sunshine are June and July (Average sunshine: 10h and 24min).
The month with the least sunshine is December (Average sunshine: 5h and 0min).
Average sunshine days in May
Decatur, TN
- Average sunshine days in May: 11.8 days
The month with the most sunshine days is October (18.6 days).
The month with the least sunshine days is July (10.2 days).
Average UV index in May
Decatur, 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
Decatur, TN
- Average cloud cover in May: 35
The month with the most cloud cover is February (Cloud cover 52).
The month with the least cloud cover is June (Cloud cover 30).
Average visibility in May
Decatur, TN
- Average visibility in May: 6mi
The months with the highest visibility are February, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January and March (5mi).
