Mumbai: It’s been an unusually wet October for Mumbai, with the Colaba observatory recording 165 mm of rainfall — 91.2 mm above normal, the highest October rainfall in three years. The unseasonal showers, which lingered through the festive week, have cooled the city but dampened the Diwali spirit, and the India Meteorological Department (IMD) says the rain isn’t done yet as light rain is expected to continue across Mumbai, Thane and Palghar until Nov 4. Last year, the monthly rain recorded in October was 131 mm, while in 2023 it was a mere 24.2 mm. At the IMD Santacruz observatory, the monthly rainfall was 73.1 mm.On Friday the skies through the day remained overcast with light rains being observed all through the day.The light rains brought down the day temperatures with the IMD Colaba and Santacruz observatory recording day temperatures of 31 degrees and 30 degrees which was 3.3 degrees and 4.7 degrees below normal. Minimum temperatures meanwhile recorded by the IMD Colaba and Santacruz observatory was 24.8 degrees and 24.2 degrees which was almost normal in case of Colaba observatory and 1.9 degrees above normal in case of the Santacruz observatory.The southwest monsoon officially withdrew from Mumbai on October 10 — two days later than its normal withdrawal date of October 8.It may be recollected that this year the southwest monsoon made a historic early arrival over Mumbai on May 26, 2025 — the earliest onset ever recorded for the city. The previous record for earliest onset was May 29, recorded in the years 1956, 1962, and 1971, with IMD records dating back to 1950. The onset over Mumbai came just two days after the monsoon was declared over Kerala (May 24), and a day after its advance into parts of Maharashtra, up to Devgad (May 25).
