Seasons

Earth experiences four seasons: spring, summer, fall, and winter. This happens because our planet is tipped on its axis and the two poles point to the same directions in space all year.

Observatory north doors

Summer occurs on the hemisphere that is tipped toward the Sun. The Sun is high in the sky, and the days are longer. The hemisphere tilted away from the Sun experiences winter. The Sun is lower in the sky, and days are shorter. The seasons change on predictable schedules, which are listed below (times for Los Angeles).

2016
Spring equinox 9:30 p.m. PDT March 19
Summer solstice 3:34 p.m. PDT June 20
Autumn equinox 7:21 a.m. PDT September 22
Winter solstice 2:44 a.m. PST December 21
2017
Spring equinox 3:29 a.m. PDT March 20
Summer solstice 9:24 p.m. PDT June 20
Autumn equinox 1:02 p.m. PDT September 22
Winter solstice 8:28 a.m. PST December 21
2018
Spring equinox 9:15 a.m. PDT March 20
Summer solstice 3:07 a.m. PDT June 21
Autumn equinox 6:54 p.m. PDT September 22
Winter solstice 2:23 p.m. PST December 21
2019
Spring equinox 2:58 p.m. PDT March 20
Summer solstice 8:54 a.m. PDT June 21
Autumn equinox 12:50 a.m. PDT September 23
Winter solstice 8:19 p.m. PST December 21
2020
Spring equinox 8:50 p.m. PDT March 19
Summer solstice 2:44 p.m. PDT June 20
Autumn equinox 6:31 a.m. PDT September 22
Winter solstice 2:02 a.m. PST December 21
2021
Spring equinox 2:37 a.m. PDT March 20
Summer solstice 8:32 p.m. PDT June 20
Autumn equinox 12:21 p.m. PDT September 22
Winter solstice 7:59 a.m. PST December 21
2022
Spring equinox 8:33 a.m. PDT March 20
Summer solstice 2:14 a.m. PDT June 21
Autumn equinox 6:04 p.m. PDT September 22
Winter solstice 1:48 p.m. PST December 21
2023
Spring equinox 2:24 p.m. PDT March 20
Summer solstice 7:58 a.m. PDT June 21
Autumn equinox 11:50 p.m. PDT September 22
Winter solstice 7:27 p.m. PST December 21
2024
Spring equinox 8:06 p.m. PDT March 19
Summer solstice 1:51 p.m. PDT June 20
Autumn equinox 5:44 a.m. PDT September 22
Winter solstice 1:20 a.m. PST December 21
2025
Spring equinox 2:01 a.m. PDT March 20
Summer solstice 7:42 p.m. PDT June 20
Autumn equinox 11:19 a.m. PDT September 22
Winter solstice 7:03 a.m. PST December 21