Whats the first month of summer

The first month of summer varies depending on the definition used. 1. **Meteorological Summer**: According to meteorological definitions, summer begins on **June 1** and ends on **August 31**. This classification divides the year into four seasons of three months each, making it easier for statistical comparisons [1][2]. 2. **Astronomical Summer**: In contrast, astronomical summer begins with the summer solstice, which typically occurs around June 21 in the Northern Hemisphere. This marks the longest day of the year and is considered the start of summer by many cultures [3][4]. In summary, if you refer to meteorological definitions, the first month of summer is **June**. If you consider astronomical definitions, it starts around late June. For more details, you can visit the sources: [Met Office](https://www.metoffice.gov.uk/weather/learn-about/weather/seasons/summer/when-does-summer-start) [1], [BBC Weather](https://www.bbc.co.uk/weather/articles/cx2j605dd8ko) [2].