September weather forecast
Ranchi, India

September signals the end of the monsoon season in Ranchi, with gradual reductions in rainfall and humidity. Temperatures begin to drop slowly, promising a return to a more comfortable climate in the following months. Daylight hours decrease slightly, but the sunshine duration remains constant, offering bright light to the city. September weather in Ranchi remains damp, marked by a substantial 139mm (5.47") of rainfall. However, as the rain gradually retreats, earthy smells and greener vistas shape Ranchi's unique post-monsoon aura.

Temperature

The transition into September is marked with an average high-temperature of a still moderately hot 29.5°C (85.1°F), showing an insignificant shift from August's 29.8°C (85.6°F). In Ranchi, the September nights cool down to an average low of 22.5°C (72.5°F).

Heat index

In September, the average heat index is appraised at a fiery hot 37°C (98.6°F). Adopt special protective actions against heat exhaustion and heat cramps. Long-duration activity risks heatstroke.
Be informed that the heat index values are oriented around shady conditions and gentle breezes. The direct sunshine could escalate the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', unifies temperature and humidity readings to offer a comprehensive feel of warmth. This effect is subjective, differing among individuals based on their physical activity and perception of heat, which can be influenced by factors like wind, clothing, and metabolic variances. When in direct sunlight, one should be cautious as it can raise the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular significance for children. 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.
The body's inherent cooling system operates through perspiration, wherein evaporating sweat offsets excessive heat. Greater relative humidity lessens the rate of evaporation, thus decreasing the body's heat dispersal, which gives rise to a sensation of overheating. When the body's heat gain surpasses its removal capacity, body temperature starts to climb, leading to potential heat-related ailments.

Humidity

The average relative humidity in September in Ranchi is 83%.

Rainfall

In Ranchi, in September, during 20.9 rainfall days, 139mm (5.47") of precipitation is typically accumulated. Throughout the year, in Ranchi, India, there are 125.5 rainfall days, and 836mm (32.91") of precipitation is accumulated.

Daylight

In Ranchi, the average length of the day in September is 12h and 17min.
On the first day of September in Ranchi, India, sunrise is at 5:30 am and sunset at 6:06 pm. On the last day of the month, sunrise is at 5:40 am and sunset at 5:37 pm IST.

Sunshine

In Ranchi, the average sunshine in September is 7.5h.

UV index

In September, the average daily maximum UV index in Ranchi is 6. A UV Index of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV radiation for the ordinary person.
Note: The UV index of 6 during September leads to these advisories:
Dodge overexposure. Fair-skinned people can get singed in less than 20 minutes. Seek shade and limit direct Sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its peak, but be aware that not all shade structures provide complete sun protection. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.