Mumbaiis bracing for a significant and sustained seasonal shift in its climate pattern throughout July 2025, characterized by persistent rainfall, thunderstorms, and strong winds. This comprehensive weather outlook, drawing information from both AQI.in and the India Meteorological Department (IMD), indicates an unusually wet period for the city, advising residents to prepare for continuous precipitation and carry appropriate rain protection.

Specifically, for Saturday, July 20, 2025, Mumbai is expected to experience patchy rainfall throughout the day. Temperatures are predicted to fluctuate between 27.1°C and 29.4°C, with an average temperature of 28.2°C. Humidity levels will be high, around 74%, and there is a 96% chance of showers. Winds are forecasted to reach speeds of up to 22 km/h. The expected rainfall accumulation for the day is approximately 3.73 mm, with scattered showers likely to intensify significantly in the late afternoon. The UV index is anticipated to remain low at 2.7. Morning hours, from sunrise at 06:11 AM until noon, are projected to be relatively drier, offering the best window for outdoor activities, before the rain intensity increases after 3 PM. Evening temperatures are expected to cool slightly to around 27.5°C.

Photo Credit: The Economic Times

The city has already faced immediate consequences from recent heavy rains, which have led to significant waterlogging in several areas and caused considerable traffic disruptions on key routes. A notable incident earlier in the week was the temporary closure of the Andheri subway due to submersion, impacting public safety and mobility. Despite these challenges, the consistent rainfall has had a crucial positive impact on Mumbai’s water supply. According to data released by the Brihanmumbai Municipal Corporation (BMC) on July 19, the combined stock in the city's seven primary reservoirs, Upper Vaitarna, Modak Sagar, Tansa, Middle Vaitarna, Bhatsa, Vihar, and Tulsi has significantly risen. Their current combined capacity stands at an impressive 81.86% of their total capacity, amounting to 11,84,796 million litres, vital for supplying the city's daily drinking water needs.

The forecast for the upcoming week indicates a continuation of this intense wet spell. On Monday, July 21, moderate rain is expected with temperatures ranging between 26.6°C and 29.3°C. Tuesday and Wednesday are projected to see increased rainfall, with Wednesday specifically experiencing heavy downpours and temperatures fluctuating between 26.3°C and 28.1°C. Thursday is forecasted to have the week's heaviest rainfall, with temperatures staying consistent between 26.4°C and 27°C. While the weekend, specifically Friday and Saturday, may bring a slight relief in intensity, rain will persist, with anticipated highs of 28.6°C and 28.1°C respectively.

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This persistent rainfall, combined with moderate temperatures, marks an unusual weather pattern for this time of year in Mumbai, making it one of the wettest periods the city has experienced in July 2025, surpassing its average rainfall for the month. The continuous strong winds throughout the week are expected to help maintain bearable conditions despite the ongoing precipitation. Although significant rainfall is predicted, the IMD has yet to issue any color-coded alerts. Residents are strongly advised to prepare for predominantly indoor activities and ensure they have appropriate rain protection when venturing outdoors.