July weather forecast
Derby, KS

July is the hottest month in Derby, Kansas, with temperatures oscillating from 72.3°F (22.4°C) to 91.9°F (33.3°C), thereby constituting the peak of summer. The weather remains predominantly dry with almost non-existent snow showers. Sunshine hits its maximum range, with an average of 11 hours. Wind speeds drop to 8.9mph (14.3km/h), contributing to the heightened summer warmth. Despite the heat, July enjoys slightly less rainfall than June, making for a drier summer month.

Temperature

July stands out as Derby's warmest month, with temperatures ranging between an average high of 91.9°F (33.3°C) and a low of 72.3°F (22.4°C).

Heat index

During July, the heat index is appraised at an extremely hot 105.8°F (41°C). More safety actions are required, heat exhaustion and heat cramps are probable. Long-term activity may precipitate heatstroke.
One should consider that heat index numbers are for shaded settings and light wind. Direct sunlight might lead to a heat index increase by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', joins air temperature with relative humidity to produce a temperature perception for humans. Additional factors encompassing metabolic differences, the level of physical activity, and clothing can impact the individual's perception of temperature. It is essential to realize that direct sunlight can escalate the perceived temperature, increasing the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Kids generally face higher risks than adults as they sweat less. Along with their large skin surface compared to their small bodies and higher heat production due to their activities, their vulnerability is increased.
The physiological response of the human body to excess warmth is to perspire, thereby cooling itself through sweat evaporation. When the air holds a significant amount of moisture, the efficiency of the evaporation process is decreased, preventing the body from cooling down efficiently, leading to the sensation of overheating. Heat absorption that surpasses the body's shedding capability can lead to overheating and varying levels of dehydration.

Humidity

The months with the lowest humidity are July and October, with an average relative humidity of 62%.

Rainfall

In Derby, in July, it is raining for 13.8 days, with typically 2.28" (58mm) of accumulated 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 July is 14h and 27min.
On the first day of July, sunrise is at 6:11 am and sunset at 8:54 pm. On the last day of the month, sunrise is at 6:32 am and sunset at 8:37 pm CDT.

Sunshine

The average sunshine in July is 11h.

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 unsafe exposure to UV radiation for the ordinary person.
Note: In July, an average UV index of 7 transforms into the following instructions:
Steer clear of overexposure. Fair-skinned individuals can be scorched in less than 20 minutes. The Sun's UV radiation is most potent between the hours of 10 a.m. and 4 p.m. Try to avoid direct sunlight during this time. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear.