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
As Rockwall welcomes May, the average high-temperature displays a subtle shift, adjusting from an agreeable 73.2°F (22.9°C) in April to a moderately hot 80.8°F (27.1°C). Rockwall's temperature tends to fall to an average low of 63.5°F (17.5°C) during the nights of May.Heat index
The average heat index in May is computed to be a hot 86°F (30°C). With extended exposure and activity, one might feel exhausted and experience heat cramps.Keep in mind the heat index values are meant for areas in shade and with light wind. Exposure to direct sunlight may make the heat index values climb by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is a metric representing the sensation of warmth when air temperature and moisture come together. The influence of weather is personal, differing among a variety of individuals based on differences in body mass, stature, and the level of physical activity. In direct sunlight, the heat's impact can be heightened, potentially leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. Children regularly disregard the necessity to rest and replenish fluids. Thirst is a late symptom of dehydration - thus, maintaining hydration, particularly during long-lasting physical activities, is essential.
Humidity
May is the most humid month, with an average relative humidity of 77%.Rainfall
In Rockwall, in May, during 15 rainfall days, 3.86" (98mm) of precipitation is typically accumulated. In Rockwall, during the entire year, the rain falls for 146.2 days and collects up to 32.91" (836mm) of precipitation.Snowfall
March through October and December are months without snowfall.Daylight
In Rockwall, the average length of the day in May is 13h and 52min.On the first day of May, sunrise is at 6:37 am and sunset at 8:08 pm. On the last day of the month, sunrise is at 6:18 am and sunset at 8:29 pm CDT.
Sunshine
The average sunshine in May is 8.6h.UV index
In May, the average daily maximum UV index is 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: The daily high UV index of 6 during May translates into the following recommendations:
Undertake protective measures and comply with sun safety rules. Shielding against skin and eye damage is essential. Between 10 a.m. and 4 p.m., UV radiation is strongest. Make an effort to avoid direct sunlight during this time, remembering that shade structures may not provide full sun protection. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Rockwall in May?
What is the most humid month?
What is the average humidity in May?
How much does it rain in Rockwall in May?
When it does not snow?
What is the average length of the day in May?
What time are sunrise and sunset in May?
How many hours of sunshine does Rockwall have in May?
How high is the UV index in May?
Average temperature in May
Rockwall, TX
- Average high temperature in May: 80.8°F
The warmest month (with the highest average high temperature) is August (95°F).
The month with the lowest average high temperature is January (54°F).
- Average low temperature in May: 63.5°F
The months with the highest average low temperature are July and August (74.8°F).
The coldest month (with the lowest average low temperature) is January (38.5°F).
Average pressure in May
Rockwall, TX
- Average pressure in May: 29.93"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in May
Rockwall, TX
- Average wind speed in May: 8.6mph
The windiest month (with the highest average wind speed) is March (9.6mph).
The calmest month (with the lowest average wind speed) is September (6.6mph).
Average humidity in May
Rockwall, TX
- Average humidity in May: 77%
The month with the highest relative humidity is May (77%).
The month with the lowest relative humidity is August (60%).
Average rainfall in May
Rockwall, TX
- Average rainfall in May: 3.86"
The wettest month (with the highest rainfall) is October (4.21").
The driest month (with the least rainfall) is January (1.81").
Average rainfall days in May
Rockwall, TX
- Average rainfall days in May: 15 days
The month with the highest number of rainy days is September (15.2 days).
The month with the least rainy days is January (7.8 days).
Average snowfall in May
Rockwall, TX
- Average snowfall in May: 0"
The month with the highest snowfall is February (0.87").
The months with the least snowfall are March, April, May, June, July, August, September, October and December (0").
Average snowfall days in May
Rockwall, TX
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is February (1.4 days).
The months with the least snowfall days are March, April, May, June, July, August, September and October (0 days).
Average daylight in May /
Average sunshine in May
Rockwall, 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: 8h and 4min
The month with the most sunshine is August (Average sunshine: 11h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 24min).
Average sunshine days in May
Rockwall, TX
- Average sunshine days in May: 14.1 days
The month with the most sunshine days is January (21.4 days).
The month with the least sunshine days is September (13.4 days).
Average UV index in May
Rockwall, 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
Rockwall, TX
- Average cloud cover in May: 36
The months with the most cloud cover are February and March (Cloud cover 43).
The month with the least cloud cover is August (Cloud cover 21).
Average visibility in May
Rockwall, 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).
Rockwall, Texas, USA
Weather forecast for your location
2. Allow the app to use your location