July deals with
Changchun's soaring temperature, marking it as the peak of the city's summer heat. Rainfall continues with a still higher average precipitation of 161mm (6.34"), extending the monsoon phenomenon beyond
June. The longest daylight duration is made evident in July, leading to a significant increase in the city's UV index to 8. Humidity hovers at a high 78%, intensified by the monsoon climate. The generous sunlight hours and hefty rainfall contribute to the energetic and buoyant feel of Changchun’s summer.
Temperature
Changchun's July weather, marked by an average high temperature of 27.6°C (81.7°F) and an average low temperature of 19°C (66.2°F), is the warmest in the year.
Heat index
The heat index value during July is computed to be a hot 31°C (87.8°F). If exposure and activity persist, fatigue could ensue, possibly leading to heat cramps.
The metrics for the heat index are tailored for both shady environments and light winds. The heat index may experience an enhancement of 15 Fahrenheit (8 Celsius) degrees under direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'feels like', combines both the air temperature and the humidity level to give a perceived human temperature. Elements such as metabolic variations, being pregnant, and physical activity can impact one's weather perception. Realize that direct exposure to sunlight can augment the felt heat, leading to a potential increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for children. Children often fail to understand the importance of rest and rehydration. Thirst is a late manifestation of dehydration - hence, it is crucial to stay hydrated, especially during ongoing physical activities.
Humidity
In July, the average relative humidity is 78%.
Rainfall
The month with the most rainfall is July, when the rain falls for 15.4 days and typically aggregates up to 161mm (6.34") of precipitation.
Daylight
In Changchun, the average length of the day in July is 15h and 5min.
On the first day of July, sunrise is at 04:00 and sunset at 19:24. On the last day of the month, sunrise is at 04:26 and sunset at 19:03 CST.
Sunshine
In Changchun, the average sunshine in July is 7.1h.
UV index
July and
August, with an average maximum UV index of 8, are months with the highest UV index. A UV Index value of 8 to 10 symbolizes a very high health hazard from unsafe exposure to UV radiation for the ordinary person.
Note: In July, the maximum UV index of 8 translates into these guidelines:
Taking safety measures is non-negotiable; skin and eyes can be swiftly affected if neglected. The hours from 10 a.m. to 4 p.m. have the most intense UV radiation. As much as possible, limit direct sun exposure during this period. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.