How many days until summer?
272 days
Summer begins at the June solstice, Monday, June 21, 2027 at 10:06 AM Eastern Time. Counted from today, Tuesday, September 22, 2026.
- Begins
- Monday
- Ends
- Wednesday, September 22
- Season length
- 94 days
- Meteorological start
- June 1
Astronomical — the solstices and equinoxes
Tied to the Earth's tilt, so the date shifts a day or two each year. This is the definition almanacs and calendars use.
Meteorological — whole calendar months
Fixed every year, so climate records can be compared like for like. This is the definition weather services use, and it is 20 days earlier.
Why the seasons are not equal
The four seasons from here
| Season | Begins | Length | Days away |
|---|---|---|---|
| Fall | September 22, 2026 | 90 days | 0 |
| Winter | December 21, 2026 | 89 days | 90 |
| Spring | March 20, 2027 | 93 days | 179 |
| Summer | June 21, 2027 | 94 days | 272 |
About summer
Astronomical summer runs from Monday, June 21, 2027 to Wednesday, September 22, 2027, which is 94 days. The seasons are not equal lengths: the Earth’s orbit is an ellipse and it moves slowest near aphelion in early July, so it spends several days longer covering the half of its orbit between the March and September equinoxes. Northern spring and summer are the long ones.
Meteorological summer starts on June 1 and always covers three whole months. Weather services use it because a season of fixed length can be compared year to year; almanacs and calendars use the astronomical one. Neither is wrong — they answer different questions, which is why “the first day of summer” has two defensible answers.