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when does autumn start uk 2025

when does autumn start uk 2025

2 min read 01-12-2024
when does autumn start uk 2025

Autumn in the UK, a season of crisp air, vibrant foliage, and cozy evenings, officially begins on a specific date each year. But when exactly does autumn start in the UK in 2025? Let's explore the astronomical and meteorological definitions to understand the difference and pinpoint the precise start date.

Astronomical Autumn vs. Meteorological Autumn

There are two ways to define the start of autumn:

Astronomical Autumn: The Equinox

Astronomically, autumn begins with the autumnal equinox. This is the moment when the Sun crosses the celestial equator, heading south. In the Northern Hemisphere, this marks the transition from summer to autumn. The exact date varies slightly each year, but the autumnal equinox in 2025 will occur around September 22nd or 23rd.

  • Key takeaway: Astronomical autumn focuses on the Earth's position relative to the sun.

Meteorological Autumn: A More Practical Approach

Meteorologists prefer a simpler, more practical approach. They divide the year into four seasons of three months each, based on average temperature patterns. This means that meteorological autumn in the UK always begins on September 1st and ends on November 30th.

  • Key takeaway: Meteorological autumn uses a consistent calendar date for ease of data analysis and weather forecasting.

So, Which Date Should You Use?

The answer depends on your perspective.

  • For observing the astronomical alignment of the sun and Earth: Use the date of the autumnal equinox (around September 22nd or 23rd in 2025). This is the moment when the season officially changes.

  • For practical purposes, weather forecasting, and data analysis: Use September 1st as the start of meteorological autumn. This offers a standardized period for comparing weather patterns and making seasonal predictions.

Beyond the Dates: Experiencing Autumn in the UK

Regardless of the exact date, autumn in the UK offers a unique experience. Expect:

  • Vibrant foliage: The leaves of trees transform into stunning shades of red, orange, gold, and brown.
  • Crisp air: Temperatures begin to drop, leading to a refreshing chill in the air.
  • Harvest festivals: Many local events celebrate the autumn harvest, providing opportunities to enjoy local produce and traditions.
  • Cosy evenings: As the nights draw in, there's a sense of warmth and comfort associated with lighting fires, drinking hot drinks, and enjoying indoor activities.

Planning Your Autumn Adventures in 2025?

Knowing when autumn officially begins helps you plan your autumnal activities. Whether you prioritize the astronomical precision of the equinox or the convenience of the meteorological calendar, prepare for a beautiful and captivating season in the UK. Remember to check local weather forecasts closer to the time for the most accurate prediction of conditions.

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