The first day of summer is also known as the summer solstice, and in 2021 it happens on June 20 at 11:32 P.M. EDT. 

This is the longest day of the year and marks the start of summer in the Northern Hemisphere. This season usually starts on June 20, 21, or 22, just after spring ends, and lasts until September 20 or 24, marking the beginning of fall. 

Summer in the United States and the Northern Hemisphere is characterized by warmer and longer days. The plants are in bloom and trees are ripe with fruit. 

Characteristics of Summer

Photo by Jan Walter Luigi on Unsplash

Summer is the hottest season of the year, with temperatures rising after the temperate heat of spring. It is during summer that we get the earliest sunrises and the latest sunsets, which is why the days are longer and the nights are shorter. The warm temperatures usually last until late in the night during summer, with some regions experiencing dry heat and others having humid days. 

The plants that began growing during spring are now in full bloom and flowering, the trees and foliage are green and lush, and fruit trees start bearing fruit.  

In the Northern Hemisphere, it is rare to rain during the summer, which can sometimes cause draughts in regions where there are very high temperatures. 

When and What is the Summer Solstice?

A summer solstice happens when the sun is at its highest position in the sky. In the Northern Hemisphere this is in June, and marks the start of summer.

During this solstice, the Earth's axis is turned 23.44° towards the sun. This results in the longest day of the year, as there are more hours of sunlight because the Northern Hemisphere receives sunlight at a direct angle.

In the Southern Hemisphere, summer starts with the December Solstice, and the June Solstice marks the beginning of winter.

The end of summer in the United States is marked by the September Equinox, which signals the arrival of fall. 

The Start of Summer date from 2021 to 2024

  • In 2021, summer starts on Sunday, June 20, at 11:32 P.M. EDT
  • In 2022, summer starts on Tuesday, June 21, at 5:14 A.M. EDT
  • In 2023, summer starts on Wednesday, June 21, at 10:58 A.M. EDT
  • In 2024, summer starts on Thursday, June 20, at 4:51 P.M. EDT

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