The warmth of winter months has increased significantly over the past 100 years.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/temperature-rise-more-winter-months-summer
[2] http://admin.indiaenvironmentportal.org.in/category/author/neha-madaan
[3] http://admin.indiaenvironmentportal.org.in/category/newspaper/times-india-pune-0
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/maharashtra
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/indian-meteorological-department-imd
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/solar-radiation
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/indian-institute-tropical-meteorology
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/global-warming