When Does Summer Begin and End
The length of the summer season is usually three months. This is applicable for both Northern and Southern Hemispheres. However, global warming has been changing the weather patterns in the world.
Northern and Southern Hemisphere
In the Northern Hemisphere it commences on 20 June and ends on September 23. In the Southern Hemisphere it usually commences on 22 December. The end date is usually on the 23rd of March. Due to the rotation of the Earth, when it is summertime in one hemisphere it is winter on the opposite end.
Keep in mind that these dates are only approximations. In some countries, the length of the summer season can be much longer. In some Southeast Asian countries, the season starts in late February and ends in June.
Hot Weather
The most visible and widely felt element of the season is the heat. This is due to the fact that the region is exposed to the Sun. Owing to the tilt and movement of the Earth, the heat differs in the hemispheres and regions. What this means is that some places on Earth are hotter than others. For example, it is usually hotter in the Middle East and India than in America or Europe.
The length of the summer season (three months) is still prevalent in most locations. However some countries experience some rainfall in the early or late periods of the season. For this reason it can sometimes be difficult to determine when the period has concluded. Rather than a specific end date, some countries now use periods to determine its ending (i.e., the hot period ends on the final two weeks of September).
Activities of Animals and Plants
The warm weather is the reason why plant and animal activity are usually at their peak. Various types of flowers, plants and vegetables achieve their full growth at this period. Although spring is when the fruits and flowers start to appear, it is in the warm months that most fruits reach the full growth potential.
Animal activities are also more pronounced during this time. The length of the summer season provides birds plenty of time to hunt for food, create nests and care for their offspring. A trip to forests will reveal that most of the animals resume their activities as well.
Other Signs of the Season
The period is also associated with times of relaxation and fun among people. In the United States and other places it is the time when people head to the beaches. It has also become associated with going to the cinemas.
In other nations, it is the peak of tourist activity. A lot of countries (particularly in Asia) see an increase in tourist arrivals at this time. The reason is that the warm weather entices tourists to visit the beaches or go diving.
While the length of the summer season so far remains constant, it might change. Already, some regions have been experiencing typhoons in the midst of the dry season.
Conversely, some of the warmest days have been recorded during the supposed rainy season. Owing to the fluctuating weather patterns, determining the time when the hottest period will commence may prove more difficult.

The first day of summer occurs on different dates. But whatever the differences in time and location, it always heralds the arrival of the warmest days of the year.
There is no specific time when spring starts. It commences on different times in different parts of the world. However, it can be defined by the events that accompany it.
The time when fall starts is between summer and winter. As with the other seasons, its commencement differs and is based on the hemisphere you are in.
The time when each season begins depends on several factors. Some of the dates adopted are based on astronomical calculations, while others for convenience.
There is no single answer to the question of when is the last day of summer. With the Earth’s rotation, the seasons occur at different times in different parts of the world. There are also other factors to consider as well.
Formerly recognized as the U.S. Weather Bureau, the National Weather Service is one of the governmental agencies that comprises the National Oceanic and Atmospheric Administration. This agency provides climate, hydrologic and weather forecasts to secure people in the country as well as in the other territories of the U.S. In addition, it is also responsible for the protection of properties within the country and nearby ocean areas that are helpful to improve the national economy. Below are important details that are useful to individuals who want to know the date when the National Weather Service was founded. Other relevant details about the service are also discussed.