when is it officially fall 2025
In 2025, fall is officially considered to begin on Monday, September 22, in the Northern Hemisphere, when the autumnal equinox occurs.
Quick Scoop: Which “official” fall?
There are actually two common answers people mean when they ask “when is it officially fall 2025?”:
- Astronomical fall (equinox) – the one most people mean.
- Starts: Monday, September 22, 2025.
* This is when day and night are nearly equal in length and the Sun crosses the celestial equator.
- Meteorological fall (for weather/climate folks)
- Starts: Monday, September 1, 2025.
* Meteorologists use fixed three‑month blocks: September–November for “fall.”
So if you’re asking “when is it officially fall 2025” in the usual calendar/space-nerd sense, the key date is:
September 22, 2025 – first day of fall (autumnal equinox) in the Northern Hemisphere.
If you tell me your country or city, I can also give the approximate local time of the equinox for your location.
TL;DR:
- “Official” (astronomical) fall 2025: September 22, 2025.
- Meteorological fall 2025: September 1, 2025.
Information gathered from public forums or data available on the internet and portrayed here.