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

June's arrival signals an increase in average high-temperatures, moving from May's moderately hot 75.4°F (24.1°C) to a hot 88.3°F (31.3°C). In Derby, June nights witness a steady temperature drop to an agreeable 69.1°F (20.6°C).

Heat index

The heat index value for June is appraised at a very hot 98.6°F (37°C). Undertake extra safety actions, heat cramps and heat exhaustion are expected. Heatstroke may result from lengthy activity.
Remember that heat index calculations are made for conditions in the shade with light wind. If exposed to direct sunlight, the heat index could climb by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is an estimation of the warmth sensation when considering humidity levels. An individual's perception of weather can be influenced by a variety of factors including metabolic differences, being pregnant, and their degree of physical exertion. Direct exposure to sun rays can potentially augment the heat sensation, elevating the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical to babies and toddlers. Young ones are generally at greater risk than adults due to their limited sweating ability. In addition, their large skin surface relative to their small bodies and higher heat production from their activities add to their vulnerability.
Perspiring is a crucial mechanism for the human body, allowing it to release excessive warmth through evaporating sweat. Augmented relative humidity impedes typical body cooling mechanisms by lowering the evaporation rate, resulting in decreased body cooling and an amplified perception of heat. Temperature imbalances caused by excessive heat retention can trigger heat-related maladies.

Humidity

In June, the average relative humidity is 66%.

Rainfall

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

Snowfall

June through September are months without snowfall in Derby.

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

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

UV index

The months with the highest UV index are June and July, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV radiation for ordinary individuals.
Note: In June, the maximum UV index of 7 suggests this advice:
Implement precautions and maintain sun safety methods. Avoidance of sunburn is demanded. Between 10 a.m. and 4 p.m., the Sun emits the most powerful UV radiation. Limit direct exposure to the Sun during these hours. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays.