Cyclone Arnab may bring cooler temperatures, increased humidity and light showers to Mumbai by October-end, but experts warn that air quality may remain poor. With Cyclone Arnab making landfall on Indiarsquos eastern coast the weather activities are likely to bring changes to conditions in Mumbai as well Independent meteorologists suggest that the city is expected to see higher moisture in the days ahead with the worst of Octoberrsquos heat behind us and.