June weather forecast
Derby, KS

June marks the advent of summer, with the mercury stretching from 69.1°F (20.6°C) to a scorching 88.3°F (31.3°C). Rainfall decreases from May's peak but still stays relatively high, making for humid conditions. Sunshine dominates for 11.1 hours a day on average, with nearly 15 sunlit days in the month. Winds during June remain steady at 10.6mph (17.1km/h), offering a respite from the heat. June concludes with no snowfall, indicating the full onset of the warmest season of the year.

Temperature

In June, the average high-temperature increases from a moderately hot 75.4°F (24.1°C) in May to a hot 88.3°F (31.3°C). Derby, in the month of June, anticipates a consistent average low-temperature of 69.1°F (20.6°C).

Heat index

The heat index value for June is appraised at a torrid 98.6°F (37°C). Exercise extra preventive actions, heat cramps and heat exhaustion are plausible. Continuous activity could result in heatstroke.
Data suggests that the heat index is set for environments in shade and with a 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 'felt air temperature' or 'apparent temperature', determines the feeling of heat when you account for the relative humidity. This effect is subjective, differing among individuals based on their physical activity and perception of heat, which can be influenced by factors like wind, clothing, and metabolic variances. The sun, when shining directly, can have a significant impact on the perceived temperature, increasing the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. Children often fail to recognize the requirement to rest and rehydrate. Thirst, being a late symptom of dehydration, underlines the importance of maintaining hydration, especially during ongoing physical activities.
Perspiration, which is the evaporation of sweat, is a primary way the human body manages and dispels excessive warmth. In circumstances of high air temperature and humidity (high heat index), the body's perspiration is restricted, heightening the feeling of warmth. Heat-related challenges, like dehydration, can be anticipated when body heat isn't managed effectively.

Humidity

The average relative humidity in June is 66%.

Rainfall

In Derby, in June, it is raining for 12.5 days, with typically 2.6" (66mm) of accumulated precipitation. Throughout the year, there are 126.5 rainfall days, and 25" (635mm) of precipitation is accumulated.

Snowfall

In Derby, snow does not fall in June through September.

Daylight

With an average of 14h and 42min of daylight, June has the longest days of the year.
On the first day of June, sunrise is at 6:09 am and sunset at 8:45 pm. On the last day of the month, sunrise is at 6:11 am and sunset at 8:54 pm CDT.

Sunshine

With an average of 11.1h of sunshine, June has the most sunshine of the year.

UV index

The months with the highest UV index are June and July, with an average maximum UV index of 7. 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 UV index of 7 in June translates into these instructions:
Elude overexposure. Fair-skinned people could get burnt in less than 20 minutes. Limit your direct sun exposure, especially between 10 a.m. and 4 p.m., when UV radiation is strongest. Shade structures might not provide complete sun protection. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage.