Question: When does monsoon season occur in the city where Centre for Science and Environment is headquartered?

full_context: Document 1: New Delhi: The climate of New Delhi is a monsoon-influenced humid subtropical climate (Köppen Cwa) with high variation between summer and winter in terms of both temperature and rainfall. The temperature varies from 46 °C (115 °F) in summers to around 0 °C (32 °F) in winters. The area's version of a humid subtropical climate is noticeably different from many other cities with this climate classification in that it features long and very hot summers, relatively dry and mild winters, a monsoonal period, and dust storms. Summers are long, extending from early April to October, with the monsoon season occurring in the middle of the summer. Winter starts in November and peaks in January. The annual mean temperature is around 25 °C (77 °F); monthly daily mean temperatures range from approximately 14 to 34 °C (57 to 93 °F). New Delhi's highest temperature ever recorded is 49.1 °C (120.4 °F) while the lowest temperature ever recorded is −3.2 °C (26.2 °F). Those for Delhi metropolis stand at 49.9 °C (121.8 °F) and −3.2 °C (26.2 °F) respectively. The average annual rainfall is 784 millimetres (30.9 in), most of which is during the monsoons in July and August.
Document 2: United Nations Environment Programme: The United Nations Environment Programme (UNEP), a programme of the United Nations, coordinates the organization's environmental activities and assists developing countries in implementing environmentally sound policies and practices. It was founded by Maurice Strong, its first director, as a result of the United Nations Conference on the Human Environment (Stockholm Conference) in June 1972 and has overall responsibility for environmental problems among United Nations agencies; however, international talks on specialized issues, such as addressing climate change or combating desertification, are overseen by other UN organizations, like the Bonn-based Secretariat of the United Nations Framework Convention on Climate Change and the United Nations Convention to Combat Desertification. UNEP's activities cover a wide range of issues regarding the atmosphere, marine and terrestrial ecosystems, environmental governance and green economy. It has played a significant role in developing international environmental conventions, promoting environmental science and information and illustrating the way those can be implemented in conjunction with policy, working on the development and implementation of policy with national governments, regional institutions in conjunction with environmental non-governmental organizations (NGOs). UNEP has also been active in funding and implementing environment related development projects.
Document 3: Campaign for Science and Engineering: The Campaign for Science and Engineering was founded as Save British Science (SBS) in January 1986. The organisation started out when 1,500 scientists banded together to pay for an advert in The Times. It called on the Prime Minister, Margaret Thatcher to 'Save British Science'. The organisation changed its name to the Campaign for Science and Engineering in 2005.
Document 4: Hyderabad: Hyderabad has a tropical wet and dry climate (Köppen Aw) bordering on a hot semi-arid climate (Köppen BSh). The annual mean temperature is 26.6 °C (79.9 °F); monthly mean temperatures are 21–33 °C (70–91 °F). Summers (March–June) are hot and humid, with average highs in the mid-to-high 30s Celsius; maximum temperatures often exceed 40 °C (104 °F) between April and June. The coolest temperatures occur in December and January, when the lowest temperature occasionally dips to 10 °C (50 °F). May is the hottest month, when daily temperatures range from 26 to 39 °C (79–102 °F); December, the coldest, has temperatures varying from 14.5 to 28 °C (57–82 °F).
Document 5: Climate of India: The Climate of India comprises a wide range of weather conditions across a vast geographic scale and varied topography, making generalisations difficult. Based on the Köppen system, India hosts six major climatic subtypes, ranging from arid desert in the west, alpine tundra and glaciers in the north, and humid tropical regions supporting rainforests in the southwest and the island territories. Many regions have starkly different microclimates. The country's meteorological department follows the international standard of four climatological seasons with some local adjustments: winter (December, January and February), summer (March, April and May), a monsoon rainy season (June to September), and a post-monsoon period (October to November).
Document 6: North East Institute of Science and Technology, Jorhat: North East Institute of Science and Technology (NEIST), Jorhat (formerly Regional Research Laboratory) is a constituent establishment of the Council of Scientific and Industrial Research (CSIR), a premier R&D organisation of India, which has a chain of laboratories across the country. This laboratory was established in 1961 under the chemical science group of CSIR and originally its main aim was to develop indigenous technologies by utilising the immense natural resources of northeastern India like Petroleum, Natural Gas, Minerals, Tea, Aromatic and Medicinal plants.
Document 7: Kathmandu: The city generally has a climate with warm days followed by cool nights and mornings. Unpredictable weather is expected, given that temperatures can drop to 1 °C (34 °F) or less during the winter. During a 2013 cold front, the winter temperatures of Kathmandu dropped to −4 °C (25 °F), and the lowest temperature was recorded on January 10, 2013, at −9.2 °C (15.4 °F). Rainfall is mostly monsoon-based (about 65% of the total concentrated during the monsoon months of June to August), and decreases substantially (100 to 200 cm (39 to 79 in)) from eastern Nepal to western Nepal. Rainfall has been recorded at about 1,400 millimetres (55.1 in) for the Kathmandu valley, and averages 1,407 millimetres (55.4 in) for the city of Kathmandu. On average humidity is 75%. The chart below is based on data from the Nepal Bureau of Standards & Meteorology, "Weather Meteorology" for 2005. The chart provides minimum and maximum temperatures during each month. The annual amount of precipitation was 1,124 millimetres (44.3 in) for 2005, as per monthly data included in the table above. The decade of 2000-2010 saw highly variable and unprecedented precipitation anomalies in Kathmandu. This was mostly due to the annual variation of the southwest monsoon.[citation needed] For example, 2003 was the wettest year ever in Kathmandu, totalling over 2,900 mm (114 in) of precipitation due to an exceptionally strong monsoon season. In contrast, 2001 recorded only 356 mm (14 in) of precipitation due to an extraordinarily weak monsoon season.
Document 8: Nanjing: Nanjing has a humid subtropical climate (Köppen Cfa) and is under the influence of the East Asian monsoon. The four seasons are distinct, with damp conditions seen throughout the year, very hot and muggy summers, cold, damp winters, and in between, spring and autumn are of reasonable length. Along with Chongqing and Wuhan, Nanjing is traditionally referred to as one of the "Three Furnacelike Cities" along the Yangtze River (长江流域三大火炉) for the perennially high temperatures in the summertime. However, the time from mid-June to the end of July is the plum blossom blooming season in which the meiyu (rainy season of East Asia; literally "plum rain") occurs, during which the city experiences a period of mild rain as well as dampness. Typhoons are uncommon but possible in the late stages of summer and early part of autumn. The annual mean temperature is around 15.46 °C (59.8 °F), with the monthly 24-hour average temperature ranging from 2.4 °C (36.3 °F) in January to 27.8 °C (82.0 °F) in July. Extremes since 1951 have ranged from −14.0 °C (7 °F) on 6 January 1955 to 40.7 °C (105 °F) on 22 August 1959. On average precipitation falls 115 days out of the year, and the average annual rainfall is 1,062 millimetres (42 in). With monthly percent possible sunshine ranging from 37 percent in March to 52 percent in August, the city receives 1,983 hours of bright sunshine annually.
Document 9: Centre for Science and Environment: Centre for Science and Environment (CSE) is a not-for-profit public interest research and advocacy organisation based in New Delhi, India. Established in 1980, CSE works as a think tank on environment-development issues in India, poor planning, climate shifts devastating India's Sundarbans and advocates for policy changes and better implementation of the already existing policies. CSE uses knowledge-based activism to create awareness about problems and propose sustainable solutions.
Document 10: Delhi: Delhi features a dry-winter humid subtropical climate (Köppen Cwa) bordering a hot semi-arid climate (Köppen BSh). The warm season lasts from 21 March to 15 June with an average daily high temperature above 39 °C (102 °F). The hottest day of the year is 22 May, with an average high of 40 °C (104 °F) and low of 28 °C (82 °F). The cold season lasts from 26 November to 9 February with an average daily high temperature below 20 °C (68 °F). The coldest day of the year is 4 January, with an average low of 2 °C (36 °F) and high of 14 °C (57 °F). In early March, the wind direction changes from north-westerly to south-westerly. From April to October the weather is hot. The monsoon arrives at the end of June, along with an increase in humidity. The brief, mild winter starts in late November, peaks in January and heavy fog often occurs.Temperatures in Delhi usually range from 2 to 47 °C (35.6 to 116.6 °F), with the lowest and highest temperatures ever recorded being −2.2 and 48.4 °C (28.0 and 119.1 °F), respectively. The annual mean temperature is 25 °C (77 °F); monthly mean temperatures range from 13 to 32 °C (55 to 90 °F). The highest temperature recorded in July was 45 °C (113 °F) in 1931. The average annual rainfall is approximately 886 mm (34.9 in), most of which falls during the monsoon in July and August. The average date of the advent of monsoon winds in Delhi is 29 June.
Document 11: La Casa de la Ciencia de Sevilla - Science Museum: Along with a museum, the building houses the Andalusian headquarters of the Spanish National Research Council (CSIC). CSIC is the largest public institution devoted to research in Spain, and the third largest in Europe. The building was opened to the public in 2008, with the goal of sharing knowledge acquired through scientific research. La Casa de la Ciencia aims to be a bridge between the scientific research community and the public, sharing contemporary scientific research and information on environmental issues.
Document 12: Climate of Islamabad: The climate of Islamabad has a humid subtropical climate (Köppen climate classifion, with five seasons: Winter (Nov − Feb), Spring (March − April), Summer (May − June), Rainy Monsoon (July − August) and Autumn (September − October). The hottest month is June, where average highs routinely exceed 38 ° C (100.4 ° F). The wettest month is July, with heavy rainfall and evening thunderstorms with the possibility of cloudburst. The coolest month is January, with temperatures variable by location. In Islamabad, temperatures vary from cold to mild, routinely dropping below zero. In the hills there is sparse snowfall. The weather ranges from a minimum of − 3.9 ° C (25.0 ° F) in January to a maximum of 46.1 ° C (115.0 ° F) in June. The average low is 2 ° C (35.6 ° F) in January, while the average high is 38.1 ° C (100.6 ° F) in June. The highest temperature recorded was 46.5 ° C (115.7 ° F) in June, while the lowest temperature was − 4 ° C (24.8 ° F) in January. On 23 July 2001, Islamabad received a record breaking 620 millimetres (24 in) of rain fell in just 10 hours. It was the heaviest rainfall in 24 hours in Islamabad and at any locality in Pakistan during the past 100 years. Following is the weather observed over Islamabad Airport, which is actually located in Rawalpindi.
Document 13: Energy and Environmental Security Initiative: Established in 2003, the Energy and Environmental Security Initiative (EESI) is an interdisciplinary Research & Policy Institute located at the University of Colorado Law School. The fundamental mission of EESI is to serve as an interdisciplinary research and policy center concerning the development and crafting of State policies, U.S. energy policies, and global responses to the world's energy crisis; and to facilitate the attainment of a global sustainable energy future through the innovative use of laws, policies and technology solutions. In pursuit of this mission, EESI's primary operational function is that of an enabling environment for teaching, research and policy analysis vis-à-vis the impact of laws and policies on the scientific, technological, sociopolitical, commercial, and environmental dimensions of sustainable energy.
Document 14: Leave No Trace: These principles have been adapted to different activities, ecosystems and environments. Since 1994, Leave No Trace Center For Outdoor Ethics, a non-profit organization also known as Leave No Trace, exists to educate people about their recreational impact on nature as well as the principles of Leave No Trace to prevent and minimize such impacts.
Document 15: Canadian Environmental Law Association: The Canadian Environmental Law Association (CELA) is a non-profit, public interest organization established in 1970 to use existing laws to protect the environment and to advocate environmental law reforms. It is also a free legal advisory clinic for the public, and will act at hearings and in courts on behalf of citizens or citizens' groups who are otherwise unable to afford legal assistance. Funded by Legal Aid Ontario, CELA is one of 79 community legal clinics located across Ontario, 15 of which offer services in specialized areas of the law. CELA also undertakes additional educational and law reform projects funded by government and private foundations.
ground_truth: the middle of the summer
sub_queries: Centre for Science and Environment >> headquarters location Answer: New Delhi
When does the monsoon season occur in New Delhi ? Answer: the middle of the summer