May weather forecast
Mumbai, India

May is the summit of the Mumbai summer with the temperature high at 33.3°C (91.9°F) and a low at 26.3°C (79.3°F). Amidst the intense heat, the city sees the first murmurs of the impending monsoon season with an increased rainfall level of 13mm (0.51"). It may still not warrant an umbrella but does bring much-needed respite from the heat. Tourists are advised to pack light clothing and sunshades. Despite the high temperatures, evenings tend to be cooler, making way for relaxed coastal walks.

Temperature

The ushering in of May in Mumbai brings an average high-temperature of a still hot 33.3°C (91.9°F), closely mirroring the 33°C (91.4°F) of April. During May, Mumbai observes a consistent average nighttime temperature of 26.3°C (79.3°F).

Heat index

For most parts of May, the heat index is appraised at a blistering 44°C (111.2°F). Forewarned: Heat cramps and heat exhaustion are anticipated. Ongoing physical activity increases the likelihood of heatstroke.
Remember that heat index calculations are made for conditions in the shade with light wind. An exposure to direct sunlight may lift the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', combines both the air temperature and the humidity level to give a perceived human temperature. The individual's impression of temperature can be affected by numerous factors such as metabolic variations, physical exertion, and attire. Keep aware, the sun, when shining directly, can intensify the heat experience, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are essentially critical for children. Young ones are generally at greater risk than adults due to their limited sweating ability. In addition, their large skin surface relative to their small bodies and higher heat production from their activities add to their vulnerability.
The process of perspiration is vital for the human body to get rid of excess warmth by allowing sweat to evaporate. With a high level of moisture in the air, the evaporation process becomes less efficient, preventing the body from cooling down efficiently and resulting in a sensation of overheating. When heat uptake goes beyond the body's cooling mechanisms, there's a surge in body temperature, posing health risks.

Humidity

The average relative humidity in May in Mumbai is 70%.

Rainfall

In Mumbai, in May, it is raining for 0.7 days, with typically 13mm (0.51") of accumulated precipitation. Throughout the year, in Mumbai, there are 78.9 rainfall days, and 2258mm (88.9") of precipitation is accumulated.

Sea temperature

In Mumbai, the average seawater temperature in May is 29.4°C (84.9°F).
Note: Between 25°C (77°F) and 29°C (84.2°F), water temperature is typically considered very warm and pleasurable by everyone. Water activities at these temperatures are enjoyable for extended periods without discomfort.

Daylight

The average length of the day in May in Mumbai is 13h and 2min.
On the first day of the month, sunrise is at 6:10 am and sunset at 7:00 pm. On the last day of May, sunrise is at 6:00 am and sunset at 7:12 pm IST.

Sunshine

May has the most sunshine of the year, with an average of 9.6h of sunshine.

UV index

March through September, with an average maximum UV index of 12, are months with the highest UV index in Mumbai. A UV Index reading of 11, and higher, represents an extreme threat to health from unsafe exposure to UV radiation for the ordinary person.
Note: In May, the average maximum UV index of 12 translates into the following recommendations:
Put into effect every precaution of importance, unprotected skin and eyes may get burns swiftly. Stay in the shade and limit direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is particularly strong. Remember, however, that shade structures may not provide complete protection. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation. Sunscreen with a sun protection factor of no less than 30 should be used liberally and reapplied frequently on overcast days, including after every swim or outdoor activity. Be mindful! Sand and water reflections can up the Sun's UV exposure.