Mumbai Weather Today: Umbrellas and raincoats are set to become essential companions for Mumbai residents this week. The monsoon is set to make its presence felt in the city in the latter stages of September, bringing continuous rain and high humidity for several days to come. There’s little hope of respite from this humid and sticky weather.
Today’s Weather: A Combination of Humidity and Drizzle
This Wednesday, September 18, 2025, dawned on a humid morning in Mumbai. The sky is mostly cloudy, and the humidity is quite high. Temperatures are expected to range between 26.2°C and 29.2°C, with an average of around 27.7°C. The real challenge is the 91% chance of rain.
City residents may face sporadic showers throughout the day, with the intensity expected to increase in the afternoon. Wind speeds could reach 16.9 km/h, but this will prove insufficient to provide relief from the humidity caused by 77% humidity. The evening will be cool and humid, making conditions unfavorable for outdoor activities.
Some Relief in Pollution Levels
The good news related to the rain clouds comes in the form of a possible improvement in air quality. On Tuesday, the Air Quality Index (AQI) was recorded at 55, which falls in the ‘moderate’ category. This reading is slightly better than the previous few days. PM2.5 and PM10 levels were 23 and 54 µg/m³, respectively, while carbon monoxide (CO) levels reached 406 µg/m³.
What will be the impact on daily routine?
The weather will be relatively calm in the morning, but residents should be prepared for heavy rain in the afternoon. Those planning to travel should bring rain protection. Staying indoors will be more comfortable in the evenings. Wearing a mask in crowded areas is recommended, especially for those with respiratory problems.
What’s the outlook for the week?
The weather forecast indicates that rain will continue. On September 19th, heavy rains are expected, with temperatures reaching 28.8°C. On September 20th, temperatures are expected to reach 28.9°C and scattered rain. Light rain is expected from September 21st to 22nd, with maximum temperatures ranging between 28.8°C and 29°C. Scattered rain is expected again on September 23rd and 24th, with temperatures ranging between 26°C and 29°C.
Humid conditions will persist throughout the week, with humidity levels hovering around 77%. Light winds will be unable to provide relief from the stickiness. Although the continuous rain may prove helpful in reducing air pollution, waterlogging in some areas may affect traffic.