Duration Of Rainy Season In India ((link)) May 2026

"In Mumbai? 120 days . June 1st to September 30th. Exactly four months of delayed trains."

10/10 Lesson: Never ask "When is rainy season in India?" Ask "Which district?"

8/10 9 months. Tropical rainforest climate. Only Jan-March are "dry." duration of rainy season in india

2/10 2.5 months. Rains start late July, end by mid-Sept. Very sharp window.

"But in Mawsynram, the wettest place on Earth? 8 months . From April to November. That's 240 days of rain per year." "In Mumbai

Northwest (Jaisalmer) ☀️ Duration: 50 days (July–Aug) Rain: <10 cm The desert waits all year for 2 weeks of clouds.

3/10 4 months on the dot. SW monsoon hits June 1-5, retreats Oct 1. Reliable like a train (but slower). Exactly four months of delayed trains

| Region | Rainy Season Length | Typical Months | Why? | | :--- | :--- | :--- | :--- | | | 4 months | June – September | Onset of Arabian Sea branch; stops abruptly after retreat. | | Northwest (Delhi, Jaipur) | 2–3 months | July – September | Weak monsoon; rain only during active western disturbances. | | Northeast (Meghalaya) | 7–8 months | April – October | Pre-monsoon "Mango showers" + strong SW Monsoon + retreating NE Monsoon. | | Tamil Nadu (Chennai) | 2 distinct seasons | Oct – Dec (NE Monsoon) + June–Sep (weak SW) | Lies in rain shadow of Western Ghats during summer; gets 60% rain from winter cyclones. | | Himalayan Foothills | 5 months | June – October | Orographic lift; delayed retreat due to mountains. |