October weather forecast
Mumbai, India

The first month of the post-monsoon autumn, October, is also a hot month in Mumbai, India, with an average temperature varying between 33.2°C (91.8°F) and 23.4°C (74.1°F).
The perfect water temperature of 28.8°C (83.8°F) with 55.8mm (2.2") of accumulated rainfall and only 3 rainfall days, makes October a great period for swimming and other water activities.

Temperature

In Mumbai, India, the average high-temperature in October is essentially the same as in September - a still tropical 33.2°C (91.8°F). In October, the average low-temperature is 23.4°C (74.1°F).

Heat index

In October, the average heat index is estimated at a life-threatening hot 47.9°C (118.2°F). Beware: Heat cramps and heat exhaustion are very likely. Heatstroke is imminent with prolonged activity.
Take into consideration that the heat index values are calculated for shade and light wind conditions. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature', 'feels like', 'real feel', or 'felt air temperature', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. Additional factors like wind, metabolic differences, differences in body mass, height, and shape, and activity influence one's weather impression. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.
The human body normally cools itself by perspiration. Excessive warmth is eliminated from the body by evaporation of sweat. Under high air temperature and humidity (high heat index) conditions, perspiration is limited, and the perception of heat is increased. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.

Humidity

In Mumbai, the average relative humidity in October is 78%.

Rainfall

In Mumbai, during October, the rain falls for 3 days and regularly aggregates up to 55.8mm (2.2") of precipitation. In Mumbai, India, during the entire year, the rain falls for 78.9 days and collects up to 2258mm (88.9") of precipitation.

Sea temperature

In Mumbai, India, in October, the average water temperature is 28.8°C (83.8°F).
Note: For swimming, diving, and other water activities, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

Daylight

In October, the average length of the day in Mumbai is 11h and 43min.
On the first day of October in Mumbai, sunrise is at 6:29 am and sunset at 6:27 pm. On the last day of the month, sunrise is at 6:38 am and sunset at 6:05 pm IST.

Sunshine

The average sunshine in October is 7.7h.

UV index

The average daily maximum UV index in October in Mumbai is 10. A UV Index value of 8 to 10 symbolizes a very high health risk from unprotected exposure to Sun's UV rays for the average person.
Note: The daily maximum UV index of 10 in October interpret into the following advice:
Take special precautions, as unprotected eyes and skin can be burned and damaged quickly. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Even on cloudy days, a sunscreen with a minimum 30 sun protection factor should be generously applied and frequently re-applied, including after every swim or outdoor exercise. Beware! The reflection of water and sand dramatically increases exposure to the UV rays.