July weather forecastDerby, KS
July
Weather in July
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.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in July
Derby, KS
- Average high temperature in July: 91.9°F
The warmest month (with the highest average high temperature) is July (91.9°F).
The month with the lowest average high temperature is January (43.3°F).
- Average low temperature in July: 72.3°F
The month with the highest average low temperature is July (72.3°F).
The coldest month (with the lowest average low temperature) is January (26.6°F).
Average pressure in July
Derby, KS
- Average pressure in July: 29.92"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).
Average wind speed in July
Derby, KS
- Average wind speed in July: 8.9mph
The windiest month (with the highest average wind speed) is April (12.2mph).
The calmest month (with the lowest average wind speed) is August (8.7mph).
Average humidity in July
Derby, KS
- Average humidity in July: 62%
The month with the highest relative humidity is May (73%).
The months with the lowest relative humidity are July and October (62%).
Average rainfall in July
Derby, KS
- Average rainfall in July: 2.28"
The wettest month (with the highest rainfall) is May (4.65").
The driest month (with the least rainfall) is January (0.83").
Average rainfall days in July
Derby, KS
- Average rainfall days in July: 13.8 days
The month with the highest number of rainy days is May (16.4 days).
The month with the least rainy days is January (4.4 days).
Average snowfall in July
Derby, KS
- Average snowfall in July: 0"
The month with the highest snowfall is February (2.28").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in July
Derby, KS
- Average snowfall days in July: 0 days
The month with the highest number of snowfall days is February (4.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in July /
Average sunshine in July
Derby, KS
- Average daylight in July: 14h and 30min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in July: 11h and 0min
The month with the most sunshine is June (Average sunshine: 11h and 6min).
The month with the least sunshine is January (Average sunshine: 6h and 6min).
Average sunshine days in July
Derby, KS
- Average sunshine days in July: 14.3 days
The month with the most sunshine days is January (22.8 days).
The month with the least sunshine days is May (12.6 days).
Average UV index in July
Derby, KS
- Average UV index in July: 7
The months with the highest UV index are June and July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in July
Derby, KS
- Average cloud cover in July: 22
The month with the most cloud cover is March (Cloud cover 39).
The month with the least cloud cover is August (Cloud cover 20).
Average visibility in July
Derby, KS
- Average visibility in July: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
