July is the apex of the summer season; thermal readings and humidity are at their highest levels. The city experiences its most substantial rainfall this month. The level of precipitation is significant, with a notable jump in accumulated rain to 171mm (6.73"). Despite the shortening daylight hours, temperatures are high, varying from 22.7°C (72.9°F) to 31°C (87.8°F) degrees.
Temperature
Tianjin's warmest month, July, generally records average temperatures ranging from a high of 31°C (87.8°F) to a low of 22.7°C (72.9°F).
Heat index
For most parts of July, the heat index is estimated at a scorching 40°C (104°F). Ensure extra safety steps, heat exhaustion and heat cramps are likely. Long activity might lead to heatstroke.
Note that heat index values are valued for light wind and location in the shade. With exposure to direct sunshine, the heat index could climb by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', is found by incorporating humidity levels into the air temperature measurement. This effect is personal, shaped by the individual's physical activity and heat sensitivity, influenced by factors including wind, clothing, and metabolic variances. It is important to note that direct sunlight can intensify the weather impact, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical to babies and toddlers. Young individuals usually face more risks than adults due to their lower sweat production. Their large skin surface area relative to their tiny bodies and high heat production from their activities adds to their risk.
When faced with excessive heat, the human body begins to perspire, utilizing the cooling benefits of sweat evaporation. A surge in relative humidity can disrupt the body's normal cooling function by slowing evaporation, hence reducing the rate at which the body cools and intensifying the perception of heat. When body temperature rises due to excess heat gain beyond its removal capability, one might experience heat-related disorders.
Humidity
In July, the average relative humidity is 76%.
Rainfall
July is the month with the most rainfall. Rain falls for 12.4 days and accumulates 171mm (6.73") of precipitation.
Daylight
In July, the average length of the day is 14h and 37min.
On the first day of the month, sunrise is at 04:49 and sunset at 19:41. On the last day of July, sunrise is at 05:11 and sunset at 19:24 CST.
Sunshine
In Tianjin, the average sunshine in July is 7h.
UV index
June through
August, with an average maximum UV index of 9, are months with the highest UV index. A UV Index estimate of 8 to 10 represents a very high health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: In July, the maximum UV index of 9 suggests this advice:
Always safeguard yourself; without protection, skin and eyes can get damaged instantly. The Sun's UV radiation is most intense from 10 a.m. to 4 p.m. Try to avoid direct sun exposure during these hours. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses. Even when it's cloudy, ensure the generous application and frequent reapplication of a sunscreen with at least 30 SPF, particularly post swim or outdoor activity.