June weather forecast
Fort Smith, AR

June kicks off the official start of the summer season. The whole city of Fort Smith switches into summer mode with children splashing in pools and families spending time in parks. Full of long, sunny days, this is an excellent time for all outdoor activities or to take a drive around town, enjoying the scenery. This month marks a significant rise in temperature, emphasizing summer's arrival by escalating from 67.6°F (19.8°C) to 89.2°F (31.8°C). Summer frivolity begins to take over the town.

Temperature

With the transition into June, Fort Smith experiences an increase in average high-temperatures, moving up from a moderately hot 79°F (26.1°C) in May to a hot 89.2°F (31.8°C). June in Fort Smith, Arkansas, marked by an average low-temperature of 67.6°F (19.8°C), indicates a large temperature drop from the daytime peak.

Heat index

June's heat index is evaluated at a blisteringly hot 105.8°F (41°C). Ensure extra safety steps, heat exhaustion and heat cramps are likely. Long activity might lead to heatstroke.
Evaluating the heat index requires understanding its values in the shade and with gentle winds. In the presence of direct sunshine, the heat index could be augmented by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', takes into account both air temperature and humidity to illustrate what people actually feel. The impact of weather on an individual can be subjective, affected by the person's activity and heat perception, which can vary due to elements including wind, clothing, and metabolic differences. Direct sun exposure is noteworthy in its ability to escalate the felt temperature, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are particularly important for children. In general, younger individuals are at greater risk than adults because they tend to sweat less. Also, having a larger skin surface to body size ratio and greater heat production due to their active behavior contribute to this danger.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. Higher relative humidity impedes evaporation, thus reducing heat dispersion from the body, culminating in a sensation of overheating. If the body retains more heat than it can expel, the increasing temperature can lead to heat-related conditions.

Humidity

In Fort Smith, the average relative humidity in June is 73%.

Rainfall

In Fort Smith, during June, the rain falls for 11.6 days and regularly aggregates up to 2.05" (52mm) of precipitation. Throughout the year, there are 131.9 rainfall days, and 25.51" (648mm) of precipitation is accumulated.

Snowfall

April through November are months without snowfall in Fort Smith.

Daylight

The month with the longest days in Fort Smith is June, with an average of 14h and 30min of daylight.
On the first day of the month, sunrise is at 6:03 am and sunset at 8:27 pm. On the last day of June, in Fort Smith, sunrise is at 6:06 am and sunset at 8:36 pm CDT.

Sunshine

In June, the average sunshine in Fort Smith, Arkansas, is 10.6h.

UV index

June and July, with an average maximum UV index of 7, are months with the highest UV index. A UV Index of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV rays for average individuals.
Note: In June, a regular UV index of 7 translates into these guidelines:
Avoid overexposure. Fair-skinned individuals can burn in under 20 minutes. The Sun's UV radiation is most intense from 10 a.m. to 4 p.m. Try to avoid direct sun exposure during these hours. A hat with a broad brim is indispensable, filtering out up to half of UV rays.