June weather forecast
Jefferson, LA

June, the first month of the summer in Jefferson, is a hot month, with an average temperature ranging between max 88.3°F (31.3°C) and min 77°F (25°C).

Temperature

The onset of June brings a minor temperature shift, with the average high-temperature moving from a warm 82.9°F (28.3°C) in May to a hot 88.3°F (31.3°C). Jefferson's temperature tends to fall to an average low of 77°F (25°C) during the nights of June.

Heat index

The heat index for June is computed to be a blistering 104°F (40°C). Greater safety measures are needed, risk of heat exhaustion and heat cramps is high. Continuous activity might trigger heatstroke.
Heat index values are typically calculated for conditions of shade and a light breeze. The heat index could see an increase by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'feels like' or 'felt air temperature', is a metric representing the sensation of warmth when air temperature and moisture come together. An individual's perception of weather can be affected by a variety of elements including metabolic differences, being pregnant, and their level of physical exertion. Under direct sun rays, the felt temperature might be heightened, with the heat index increasing by 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. Young ones are generally more prone to risk than adults due to their reduced ability to sweat. Their large skin surface area relative to their diminutive bodies and elevated heat production from their activities further enhance this risk.
Perspiration and the resultant sweat evaporation are the body's natural thermostat, helping regulate temperature. When relative humidity is at high levels, the evaporation rate lessens, causing the body to keep more heat than it would in less humid conditions. Overheating and potential dehydration arise when body heat gain eclipses its release capability.

Humidity

The average relative humidity in June is 74%.

Rainfall

In Jefferson, during June, the rain falls for 11.5 days and regularly aggregates up to 0.87" (22mm) of precipitation. Throughout the year, there are 104.1 rainfall days, and 8.39" (213mm) of precipitation is accumulated.

Daylight

The month with the longest days is June, with an average of 14h and 0min of daylight.
On the first day of the month, sunrise is at 5:59 am and sunset at 7:57 pm. On the last day of June, sunrise is at 6:03 am and sunset at 8:05 pm CDT.

Sunshine

June has the most sunshine of the year, with an average of 11h of sunshine.

UV index

May through September, with an average maximum UV index of 7, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high threat to health from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The daily high UV index of 7 in June translates into this advice:
Stick with precautions and abide by sun safety procedures. Evading sunburn is essential. Stay out of direct sunlight between 10 a.m. and 4 p.m., when UV radiation is most intense, and remember that not all shade structures provide complete protection. Always opt for UVA and UVB-resistant sunglasses on radiant days.