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

Derby's warmest month, July, registers temperatures that range from a high of 91.9°F (33.3°C) to a low of 72.3°F (22.4°C).

Heat index

The heat index value during July is appraised at an extremely hot 105.8°F (41°C). Ensure extra safety measures, heat exhaustion and heat cramps are likely. Continuous activity might result in heatstroke.
In reference to the heat index, it's for places in shade and with a slight wind. When under direct sunshine, the heat index may be elevated by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is the result of factoring in humidity to the air temperature, indicating perceived warmth. Depending on the activity and the individual's heat perception, which may vary due to factors including wind, clothing, and metabolic variations, this effect remains subjective. It is noteworthy to mention that direct sunlight exposure can augment the felt temperature, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for babies and toddlers. Young individuals are typically more threatened than adults due to their reduced perspiration. Also, the larger skin surface proportionate to their small bodies and the increased heat from their activities magnify their risk.
To offset high temperatures, the human body releases sweat which, upon evaporation, cools it down. Greater relative humidity lessens the rate of evaporation, thus decreasing the body's heat dispersal, which gives rise to a sensation of overheating. If heat absorption isn't effectively countered by the body's cooling methods, body temperature surges, hinting at potential problems.

Humidity

July and October, with an average relative humidity of 62%, are the least humid months in Derby.

Rainfall

In July, the rain falls for 13.8 days. Throughout July, 2.28" (58mm) of precipitation is accumulated. In Derby, during the entire year, the rain falls for 126.5 days and collects up to 25" (635mm) of precipitation.

Snowfall

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

Daylight

In Derby, the average length of the day in July is 14h and 27min.
On the first day of July in Derby, 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

In Derby, 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 estimate of 6 to 7 represents a high threat to health from unprotected exposure to Sun's UV rays for average individuals.
Note: In July, an average UV index of 7 transforms into the following instructions:
Persist with precautions and heed sun safety advice. Prevention of sunburn is compulsory. 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. Enhance your sun protection with tightly woven, yet airy clothing.