June weather forecast
Lewisville, TX

June is a true representation of sultry Texas summers with temperatures reaching a scorching daily average high of 91.2°F (32.9°C). Sun-soaked days are common, averaging a daily sunshine duration of around 10.2 hours. While some clouds might cast their shadows occasionally, expectations of frequent and long sunny days are typically met in June. As July approaches, temperatures continue to rise, leading to the hottest period of the year.

Temperature

June's arrival is marked by an increase in the average high-temperature, moving from a moderately hot 82.2°F (27.9°C) in May to a hot 91.2°F (32.9°C). An average nighttime temperature of 73.9°F (23.3°C) is observed during June.

Heat index

Throughout June, the heat index is computed to be a blistering 107.6°F (42°C). Take greater precautions, heat exhaustion and heat cramps may be expected. Heatstroke could result from lengthy activity.
One should be cognizant that the heat index values are tailored for shaded spots and mild winds. Direct sunshine exposure could raise heat index values by as much as 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', ties air temperature with relative humidity to produce the perceived temperature sensation. One's weather perception can be influenced by a range of factors including metabolic differences, being pregnant, and their level of physical activity. Sunshine, when direct, has the potential to intensify weather effects, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Children typically face more danger than adults as their sweat production is usually lower. Additionally, the bigger skin surface compared to their small size and the increased heat due to their activeness exacerbate the risk.
Perspiring is how the human body naturally cools down, as sweat's evaporation takes away excess heat. With a high level of moisture in the air, the evaporation process becomes less efficient, preventing the body from cooling down efficiently and resulting in a sensation of overheating. When the body is unable to balance heat gain, its temperature elevates, which may induce thermal illnesses.

Humidity

In June, the average relative humidity is 66%.

Rainfall

In Lewisville, in June, during 11.7 rainfall days, 2.76" (70mm) of precipitation is typically accumulated. Throughout the year, there are 132.1 rainfall days, and 29.09" (739mm) of precipitation is accumulated.

Snowfall

In Lewisville, snow does not fall in April through October.

Daylight

June has the longest days of the year, with an average of 14h and 18min of daylight.
On the first day of the month, sunrise is at 6:19 am and sunset at 8:32 pm. On the last day of June, sunrise is at 6:22 am and sunset at 8:40 pm CDT.

Sunshine

In June, the average sunshine is 10.2h.

UV index

The months with the highest UV index in Lewisville are May through August, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high threat to health from unsafe exposure to UV radiation for the average person.
Note: A maximum UV index of 7 in June translates into the following recommendations:
Implement preventive steps and embrace sun safety standards. Protection from skin and eye distress is compulsory. Limit direct sun exposure especially between 10 a.m. and 4 p.m., when UV radiation is at its peak. However, keep in mind that shade structures may not provide full sun protection. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes.