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
Roy's transition into May sees a mild rise in the average high-temperature, edging from a warm 76.8°F (24.9°C) in April to a still moderately hot 84°F (28.9°C). A striking departure from daytime highs to an average low-temperature of 62.4°F (16.9°C) is witnessed during May.Heat index
May's heat index is appraised at a hot 91.4°F (33°C). Incorporate special precautions, risk of heat exhaustion and heat cramps is substantial. Sustained activity could cause heatstroke.Heat index data is primarily for areas with shade and subjected to light winds. Exposing to direct sunshine may enhance heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. Metabolic differences, pregnancy status, and the level of physical activity are additional factors influencing an individual's weather perception. Direct sunlight can potentially raise the heat index by 15 Fahrenheit (8 Celsius) degrees, so it's crucial to consider. Heat index values are particularly relevant to babies and toddlers. In general, children are more at risk than adults because they sweat less. Furthermore, the large skin surface compared to their small bodies and the high heat production due to their actions contribute to this vulnerability.
Humidity
The average relative humidity in May is 74%.Rainfall
In Roy, during May, the rain falls for 13.7 days and regularly aggregates up to 2.6" (66mm) of precipitation. Throughout the year, there are 165.6 rainfall days, and 36.06" (916mm) of precipitation is accumulated.Snowfall
April through November are months without snowfall.Daylight
In Roy, Mississippi, the average length of the day in May is 13h and 49min.On the first day of the month, sunrise is at 6:07 am and sunset at 7:35 pm. On the last day of May, sunrise is at 5:49 am and sunset at 7:56 pm CDT.
Sunshine
In May, the average sunshine is 9.7h.UV index
In May, the average daily maximum UV index is 6. A UV Index reading of 6 to 7 represents a high health vulnerability from unsafe exposure to UV radiation for the average person.Note: The daily high UV index of 6 in May translates into this advice:
Ward off overexposure. Defence against solar harm is crucial. 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-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is it hot during May?
What is the average humidity in May?
How many days does it rain in May?
When it does not snow?
What is the average length of the day in May?
When is the sunrise / sunset in May in Roy?
How many hours of sunshine does Roy have in May?
How high is the UV index in May?
Average temperature in May
Roy, MS
- Average high temperature in May: 84°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 (55°F).
- Average low temperature in May: 62.4°F
The months with the highest average low temperature are July and August (71.8°F).
The coldest month (with the lowest average low temperature) is January (38.3°F).
Average pressure in May
Roy, MS
- Average pressure in May: 29.99"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.96"Hg).
Average wind speed in May
Roy, MS
- Average wind speed in May: 5.7mph
The windiest month (with the highest average wind speed) is April (7.1mph).
The calmest month (with the lowest average wind speed) is July (4.6mph).
Average humidity in May
Roy, MS
- Average humidity in May: 74%
The month with the highest relative humidity is December (81%).
The month with the lowest relative humidity is October (71%).
Average rainfall in May
Roy, MS
- Average rainfall in May: 2.6"
The wettest month (with the highest rainfall) is December (3.86").
The driest month (with the least rainfall) is November (2.09").
Average rainfall days in May
Roy, MS
- Average rainfall days in May: 13.7 days
The month with the highest number of rainy days is July (21.7 days).
The month with the least rainy days is November (8 days).
Average snowfall in May
Roy, MS
- Average snowfall in May: 0"
The month with the highest snowfall is December (0.43").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in May
Roy, MS
- Average snowfall days in May: 0 days
The months with the highest number of snowfall days are January and December (0.8 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
Roy, MS
- Average daylight in May: 13h and 5min
The month with the longest days is June (Average daylight: 14h and 12min).
The month with the shortest days is December (Average daylight: 10h and 6min).
- Average sunshine in May: 9h and 4min
The month with the most sunshine is June (Average sunshine: 10h and 30min).
The month with the least sunshine is December (Average sunshine: 4h and 48min).
Average sunshine days in May
Roy, MS
- Average sunshine days in May: 15.2 days
The months with the most sunshine days are October and November (20.4 days).
The month with the least sunshine days is July (7.5 days).
Average UV index in May
Roy, MS
- Average UV index in May: 6
The months with the highest UV index are June, July and August (UV index 7).
The month with the lowest UV index is December (UV index 2).
Average cloud cover in May
Roy, MS
- Average cloud cover in May: 37
The month with the most cloud cover is February (Cloud cover 50).
The month with the least cloud cover is October (Cloud cover 31).
Average visibility in May
Roy, MS
- Average visibility in May: 5mi
The months with the highest visibility are February, March, April, June, October and November (6mi).
The months with the lowest visibility are January, May, July, August, September and December (5mi).
Roy, Mississippi, USA
Weather forecast for your location
2. Allow the app to use your location