The correct answer is 85%.
महत्त्वाचे मुद्दे (Key Points):
South-Western monsoon in Maharashtra
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Maharashtra receives more rainfall from South-West Monsson than North-East Monsoon.
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Seasonal rainfall is maximum over the Konkan region followed by the eastern Vidharbha region whereas Madhya Maharashtra as a rain shadow region receives less rainfall.
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The highest values of maximum daily rainfall are located over the Sindhudurg, Ratnagiri, Raigadh, Mumbai, and Thane districts of the Konkan region followed by that over eastern Vidharbha.
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In Maharashtra duration of the Monsoon varies from June to September.
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Maharashtra received 85% of the rainfall from the South-Western monsoon from May to September period.
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The remaining 15% of rainfall was received from North-East Monsoon during the period of October to January.
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Rainfall in the state of Maharashtra varies from 60 cm to 600 cm during this period
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In Maharashtra, the Highest rainfall was received in the months of July.
💡 Additional InformationSouth-Western monsoon
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During the hot subtropical summers, the massive landmass of the Indian Peninsula heats up at a different rate than the surrounding seas, resulting in a pressure gradient from south to north.
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This causes the flow of moisture-laden winds from sea to land.
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On reaching land, these winds rise because of the geographical relief, cooling adiabatically and leading to orographic rains.
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This is the southwest monsoon.
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The reverse happens during the winter, when the land is colder than the sea, establishing a pressure gradient from land to sea.
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This causes the winds to blow over the Indian subcontinent toward the Indian Ocean in a northeasterly direction, causing the northeast monsoon.
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Because the southwest monsoon flows from sea to land, it carries more moisture and therefore causes more rain, than the northeast monsoon
Monsoon in Maharashtra: Approximately 85% of annual rainfall in Maharashtra is received from the Southwest monsoon (June to September). Konkan receives the highest rainfall (Amboli ~750 cm), while the rain-shadow belt east of the Western Ghats receives <50 cm.