May weather forecastRowlett, TX

May

Weather in May

May, the last month of the spring in Rowlett, is another warm month, with an average temperature fluctuating between 63.9°F (17.7°C) and 81.1°F (27.3°C).

Temperature

May showcases a minor temperature ascent, adjusting from April's 73.9°F (23.3°C) to a still moderately hot 81.1°F (27.3°C). The average temperature in Rowlett drops to a comfortable 63.9°F (17.7°C) during the night in the month of May.

Heat index

May's mean heat index is estimated at a hot 86°F (30°C). If exposure and activity are sustained, they might cause a feeling of weariness, resulting in heat cramps.
Heat index's context suggests values are appropriate for shady areas and slight breezes. With direct sunlight, the heat index could increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', marries air temperature and humidity to produce a value illustrating perceived warmth. Factors including metabolic differences, physical activity, and clothing are additional elements that influence the individual's temperature experience. When directly under the sun, the weather's impact can intensify, possibly boosting the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. Children frequently do not understand the need for recuperation and hydration. Thirst, being a late manifestation of dehydration, underlines the need to hydrate frequently, especially when engaging in prolonged physical exercises.

Humidity

With an average relative humidity of 76%, May is the most humid month.

Rainfall

The month with the most rainfall is May, when the rain falls for 12.4 days and typically aggregates up to 2.4" (61mm) of precipitation.

Snowfall

March through December are months without snowfall.

Daylight

In Rowlett, the average length of the day in May is 13h and 52min.
On the first day of the month, sunrise is at 6:37 am and sunset at 8:08 pm. On the last day of May, sunrise is at 6:18 am and sunset at 8:29 pm CDT.

Sunshine

In May, the average sunshine is 8.6h.

UV index

May through August, with an average maximum UV index of 7, are months with the highest UV index. A UV Index value of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV radiation for the ordinary person.
Note: A typical high UV index of 7 in May suggests the following recommendations:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. UV radiation from the Sun is most intense between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized.

Updated: Aug 18, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

May temperatures vary between a high-temperature of 81.1°F (27.3°C) and a low-temperature of 63.9°F (17.7°C). In May, the average heat index (a.k.a. 'real feel', 'feels like'), which combines relative humidity and air temperature, is estimated at 86°F (30°C).

The most humid month is May, with an average relative humidity of 76%.

In May, the average relative humidity is 76%.

May is the month with the most rainfall in Rowlett. Rain falls for 12.4 days and accumulates 2.4" (61mm) of precipitation.

In Rowlett, in May, it is raining for 12.4 days, with typically 2.4" (61mm) of accumulated precipitation.

In Rowlett, snow does not fall in March through December.

In Rowlett, the average day length in May is 13h and 52min.

In May, on the first day of the month, 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.

The average sunshine duration in May is 8.6h.

The months with the highest UV index are May through August, with an average maximum UV index of 7.

In May, the average daily maximum UV index is 7. A UV Index estimate of 6 to 7 represents a high health risk from exposure to the Sun's UV radiation.

Today

Tomorrow

Long-term

Year J F M A May J J A S O N D

Apr

May

Jun

Average high temperature

73.9°F

81.1°F

90.1°F

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

10.5mph

9.5mph

8.4mph

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

11.3

12.4

11.3

Average snowfall

Average snowfall days

Average daylight

Average sunshine

Average sunshine days

16.5

16.3

16.2

Average UV index

Average cloud cover

Average visibility

Average temperature in May
Rowlett, TX

Average high temperature in May: 81.1°F

The warmest month (with the highest average high temperature) is August (95.4°F).
The month with the lowest average high temperature is January (54.1°F).

Average low temperature in May: 63.9°F

The month with the highest average low temperature is August (75.2°F).
The coldest month (with the lowest average low temperature) is January (38.8°F).

Average pressure in May
Rowlett, 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
Rowlett, TX

Average wind speed in May: 8.8mph

The windiest months (with the highest average wind speed) are March and April (9.8mph).
The calmest month (with the lowest average wind speed) is September (6.6mph).

Average humidity in May
Rowlett, TX

Average humidity in May: 76%

The month with the highest relative humidity is May (76%).
The month with the lowest relative humidity is August (59%).

Average rainfall in May
Rowlett, TX

Average rainfall in May: 2.4"

The wettest month (with the highest rainfall) is May (2.4").
The driest month (with the least rainfall) is February (0.79").

Average rainfall days in May
Rowlett, TX

Average rainfall days in May: 12.4 days

The month with the highest number of rainy days is September (12.5 days).
The month with the least rainy days is January (5.6 days).

Average snowfall in May
Rowlett, TX

Average snowfall in May: 0"

The month with the highest snowfall is February (0.24").
The months with the least snowfall are March, April, May, June, July, August, September, October, November and December (0").

Average snowfall days in May
Rowlett, TX

Average snowfall days in May: 0 days

The month with the highest number of snowfall days is February (0.8 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
Rowlett, TX

Average daylight in May: 13h and 54min

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 36min

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 30min).

Average sunshine days in May
Rowlett, TX

Average sunshine days in May: 16.3 days

The month with the most sunshine days is January (24.3 days).
The month with the least sunshine days is June (16.2 days).

Average UV index in May
Rowlett, TX

Average UV index in May: 7

The months with the highest UV index are May, 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
Rowlett, TX

Average cloud cover in May: 37

The months with the most cloud cover are February and March (Cloud cover 42).
The month with the least cloud cover is August (Cloud cover 21).

Average visibility in May
Rowlett, 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).