January weather forecast and climate
Mumbai, India

January, the same as December, in Mumbai, India, is a hot winter month, with temperature in the range of an average high of 30.7°C (87.3°F) and an average low of 16.8°C (62.2°F).
An excellent water temperature of 25.2°C (77.4°F) and only 0.1 rainfall days, with 0.6mm (0.02") of accumulated rainfall, makes January a prime for swimming and other water activities.

Temperature

In Mumbai, the average high-temperature is relatively the same as in December - a still tropical 30.7°C (87.3°F). In January, the average low-temperature is 16.8°C (62.2°F).

Heat index

The average heat index in January is calculated to be a torrid 36.5°C (97.7°F). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature', 'felt air temperature', 'feels like', or 'real feel', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. Additional factors like differences in body mass, height, and shape, pregnancy, metabolic differences, and activity influence one's weather impression. Bear in mind that direct sunshine exposure increases weather impact, and may raise 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.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. When the relative humidity is high, the evaporation rate is reduced. The warmth is removed from the body at a lower rate, causing the body to retain more heat than it would in dry air. 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 January is 69%.

Rainfall

In January, in Mumbai, India, the rain falls for 0.1 days. Throughout January, 0.6mm (0.02") of precipitation is accumulated. In Mumbai, 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, the average seawater temperature is 25.2°C (77.4°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 Mumbai, the average length of the day in January is 11.1h.

Sunshine

The average sunshine in Mumbai, India, is 8.7h.

UV index

In January, the average daily maximum UV index is 8. A UV Index value of 8 to 10 symbolizes a very high health hazard from the exposure to the Sun's UV radiation for ordinary individuals.
Note: The average daily UV index of 8 transform into the following instructions:
Take special precautions, as unprotected eyes and skin can be burned and damaged quickly. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. A wide-brim hat offers excellent sun protection for 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. Beware! The strength of the UV rays is significantly increased by the reflection of the water and sand.