When Does Fall Start in New Jersey? Meteorological vs. “Feels Like” Dates

There are two answers, depending on what you mean by “start.”

Official (Meteorological) Start

September 1. Meteorologists define seasons in three-month blocks for consistent statistics: Fall = Sep 1 – Nov 30.

Astronomical Start (Autumnal Equinox)

September 22 or 23 (varies yearly). The moment the sun crosses the celestial equator heading south. In 2024, it’s September 22 at 8:44 AM EDT.

When It Actually *Feels* Like Fall in NJ

• Mid-to-late August: First crisp, dry Canadian air masses arrive; nights drop into 50s°F (10–15°C).
• Early September: Daytime highs ease from 80s to 70s°F; humidity drops; “back-to-school” vibe.
• Late September–October: Peak foliage (northwest NJ first, coast last), apple/pumpkin season, consistent sweater weather.

Why the Disconnect?

New Jersey’s mid-latitude, coastal-influenced climate means seasonal lag—oceans retain summer heat, delaying cooling. Meanwhile, the meteorological calendar is a statistical convenience, not a weather forecast.

Quick Reference

So if you’re planning a fall visit: late September through October delivers the classic NJ autumn experience.