August weather forecast
Derby, KS

In August, Derby experiences a minor decline in temperatures, with the mercury hanging between 68.9°F (20.5°C) and 89.6°F (32°C). Keeping up with July patterns, snowfall continues to remain negligible. The duration of daily sunlight reduces slightly from the previous month, offering a hint of the encroaching fall. Average wind speed drops even further to 8.7mph (14km/h). Rainfall levels increase compared to July, adding to the humidity and signaling the beginning of a transition towards cooler months.

Temperature

With the onset of August, Derby's average high-temperature clocks in at a still hot 89.6°F (32°C), showing a minor fluctuation from the previous month. Nighttime temperature in Derby, Kansas, experiences an average drop to an agreeable 68.9°F (20.5°C) in August.

Heat index

The heat index value for August is appraised at a very hot 100.4°F (38°C). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
Regarding the heat index, one should be aware it's determined by shaded settings and mild winds. When under direct sunshine, the heat index may be elevated by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', is a single figure representing how weather conditions feel when combining temperature and humidity. This impact is subjective, influenced by the person's physical activity and individual heat perception, affected by factors including wind, attire, and metabolic differences. Direct sunlight can potentially raise the heat index by 15 Fahrenheit (8 Celsius) degrees, so it's crucial to consider. Heat index values hold great significance to children. Young kids are often more at risk than adults as they tend to perspire less. Besides, their skin surface is larger relative to their small bodies, and their increased heat output from their active lifestyle compounds their risk.
Sweat evaporation, driven by perspiration, is the method the human body uses to rid itself of excessive warmth. Under high air temperature coupled with high humidity (high heat index), the body's perspiration is reduced, intensifying the sensation of heat. When the body is unable to balance heat gain, its temperature elevates, which may induce thermal illnesses.

Humidity

In August, the average relative humidity is 64%.

Rainfall

In Derby, Kansas, during August, the rain falls for 12.4 days and regularly aggregates up to 3.27" (83mm) of precipitation. Throughout the year, there are 126.5 rainfall days, and 25" (635mm) of precipitation is accumulated.

Snowfall

June through September are months without snowfall.

Daylight

The average length of the day in August is 13h and 34min.
On the first day of the month, sunrise is at 6:33 am and sunset at 8:36 pm. On the last day of August, in Derby, sunrise is at 6:59 am and sunset at 7:59 pm CDT.

Sunshine

In August, the average sunshine is 11h.

UV index

In August, the average daily maximum UV index in Derby is 6. A UV Index reading of 6 to 7 represents a high health risk from unsafe exposure to UV radiation for ordinary individuals.
Note: The daily maximum UV index of 6 in August interprets into the following advice:
Apply measures and align with sun safety principles. Safeguarding against skin and eye injury is pivotal. Between 10 a.m. and 4 p.m., the Sun's UV radiation is at its peak. Limit your exposure to direct sunlight during these hours. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration.