September autumn: UKGM climate profile and 2026 forecast

Autumn September park scene: trees with drying leaves, an elderly man and a child on the steps against a city skyline — illustration of the UKGM climate forecast for autumn 2026

A sunny September day in a city park where the trees are already beginning to lose their leaves, setting the tone for the first month of autumn. Against the backdrop of the city skyline, an elderly man and a child relax on the steps, enjoying the warm weather. The frame vividly reflects the September climate profile revealed by UKGM forecasters in their 2026 outlook.

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