Contents
- Weather in May
- Frequently asked questions
- Average temperature in May
- Average pressure in May
- Average wind speed in May
- Average humidity in May
- Average rainfall in May
- Average rainfall days in May
- Average snowfall in May
- Average snowfall days in May
- Average daylight in May
- Average sunshine in May
- Average sunshine days in May
- Average UV index in May
- Average cloud cover in May
- Average visibility in May
Weather in May
Temperature
May's arrival coincides with a marginal rise in the average high-temperature, moving from April's 74.3°F (23.5°C) to a still warm 80.6°F (27°C). Throughout the month of May, Decatur reports a steady low-temperature average of 62.8°F (17.1°C).Heat index
The heat index value during May is appraised at 84.2°F (29°C). Persisting in activity during exposure could lead to weariness and subsequently to heat cramps.When assessing, remember that heat index measurements are for light winds and shaded spots. The direct sunshine could escalate the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is a measure that combines air temperature and relative humidity into a single value that indicates how hot the weather feels. The influence of weather is personal, with varied individuals experiencing it differently due to differences in body mass, stature, and physical exertion levels. When exposed to direct sunlight, it's possible for the heat index to increase by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. Young children are more at risk than adults since they tend to sweat less. Moreover, their large skin surface in proportion to their small bodies and the high heat production due to their activities contribute to their vulnerability.
Humidity
With an average relative humidity of 74%, May is the most humid month.Rainfall
In May, the rain falls for 15.2 days. Throughout May, 3.54" (90mm) of precipitation is accumulated. Throughout the year, there are 131.9 rainfall days, and 28.31" (719mm) of precipitation is accumulated.Snowfall
April through November are months without snowfall in Decatur.Daylight
The average length of the day in May is 13h and 53min.On the first day of the month, sunrise is at 6:41 am and sunset at 8:13 pm. On the last day of May, sunrise is at 6:22 am and sunset at 8:34 pm CDT.
Sunshine
In Decatur, the average sunshine in May is 9.1h.UV index
The average daily maximum UV index in May is 6. A UV Index reading of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV rays for the average person.Note: The average daily UV index of 6 in May transforms into the following instructions:
Take precautions against overexposure. Protection against sun damage is needed. Stay in the shade and limit direct sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its strongest. Remember, however, that not all shade structures provide full sun protection. During bright days, sunglasses that offer UVA and UVB defense are recommended.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in May?
What is the most humid month?
What is the average humidity in May in Decatur?
How many days does it rain in May?
When it does not snow?
What is the average length of the day in May?
When are sunrise and sunset in May?
How long on average sun shines in May?
How high is the UV index in May?
Average temperature in May
Decatur, TX
- Average high temperature in May: 80.6°F
The warmest month (with the highest average high temperature) is August (95.2°F).
The month with the lowest average high temperature is January (54°F).
- Average low temperature in May: 62.8°F
The month with the highest average low temperature is August (74.8°F).
The coldest month (with the lowest average low temperature) is January (37.4°F).
Average pressure in May
Decatur, TX
- Average pressure in May: 29.91"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in May
Decatur, TX
- Average wind speed in May: 9.6mph
The windiest months (with the highest average wind speed) are March and April (10.7mph).
The calmest month (with the lowest average wind speed) is September (7mph).
Average humidity in May
Decatur, TX
- Average humidity in May: 74%
The month with the highest relative humidity is May (74%).
The month with the lowest relative humidity is August (56%).
Average rainfall in May
Decatur, TX
- Average rainfall in May: 3.54"
The wettest month (with the highest rainfall) is October (3.62").
The driest month (with the least rainfall) is January (1.34").
Average rainfall days in May
Decatur, TX
- Average rainfall days in May: 15.2 days
The month with the highest number of rainy days is May (15.2 days).
The month with the least rainy days is January (5.7 days).
Average snowfall in May
Decatur, TX
- Average snowfall in May: 0"
The month with the highest snowfall is February (1.14").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in May
Decatur, TX
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is February (1.9 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in May /
Average sunshine in May
Decatur, TX
- Average daylight in May: 13h and 5min
The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in May: 9h and 1min
The month with the most sunshine is July (Average sunshine: 11h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 54min).
Average sunshine days in May
Decatur, TX
- Average sunshine days in May: 13.5 days
The month with the most sunshine days is January (23.6 days).
The month with the least sunshine days is May (13.5 days).
Average UV index in May
Decatur, TX
- Average UV index in May: 6
The months with the highest UV index are June, July and August (UV index 7).
The months with the lowest UV index are January and December (UV index 3).
Average cloud cover in May
Decatur, TX
- Average cloud cover in May: 34
The month with the most cloud cover is March (Cloud cover 36).
The month with the least cloud cover is August (Cloud cover 18).
Average visibility in May
Decatur, TX
- Average visibility in May: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Decatur, Texas, USA
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