Season Calculator
Enter a date and choose your hemisphere to find which meteorological season it falls in — Southern Hemisphere seasons run opposite to the Northern Hemisphere.
How the Season formula works
Meteorological seasons group by calendar month rather than exact solstice/equinox dates:
Northern Hemisphere: Winter (Dec–Feb), Spring (Mar–May), Summer (Jun–Aug), Fall (Sep–Nov) Southern Hemisphere: seasons shifted exactly 6 months opposite
Step-by-step calculation
- Take the month of the entered date.
- Match it against the three-month meteorological season groups for the chosen hemisphere.
- Southern Hemisphere seasons are the Northern Hemisphere groups shifted by six months.
Worked example
July 15 in the Northern Hemisphere falls in Summer. The same date in the Southern Hemisphere falls in Winter, since seasons are reversed south of the equator.
Frequently asked questions
What's the difference between meteorological and astronomical seasons?
Meteorological seasons group by full calendar months for consistency in climate record-keeping, while astronomical seasons are defined by the exact solstices and equinoxes, which shift by a day or two each year — this calculator uses the simpler, fixed meteorological definition.
Why are Southern Hemisphere seasons reversed?
The Earth's tilt means the Southern Hemisphere is angled toward the sun when the Northern Hemisphere is angled away, and vice versa — so while the Northern Hemisphere experiences summer, the Southern Hemisphere experiences winter at the same time.