Since, 2005, the Kerala onset date has ranged from May 24 – June 10. Sometime in June the INDIA METEOROLOGICAL DEPARTMENT is expected to issue a detailed long term weather forecast for the season.
June 1 is the historical average onset date of the monsoon over the southern state of Kerala. June 10 is the historical average arrival date in Mumbai, the financial center of India.
Other important benchmark dates regarding the IndoPak guar crop are June 15 (southern edge of Indian guar area), July 1 (Jodhpur), and July 15 (eastern edge of Pakistani growing area). May and June are the time of pre-planting rains. July is pre-planting rain and/or monsoon planting rains. The latest planting date is early-mid August.