Both cities have almost the same weather, if it's grey in London, it could well be grey in Paris. Paris is usually a little colder in Winter than London and a tad warmer in Summer.

Statistically, London is slightly colder than Paris, although the two cities share a very similar temperate maritime climate. Because Paris is located further inland and slightly further south than London, it experiences more "continental" influences, leading to slightly higher average temperatures year-round. In the winter (January), the average high in London is about 7°C to 8°C (45°F–46°F), while Paris is often 1–2 degrees warmer. In the peak of summer (July), the difference is more noticeable: Paris frequently sees average highs around 25°C (77°F), whereas London tends to hover around 22°C to 23°C (72°F–73°F). Paris also tends to have sunnier summers, while London’s proximity to the Atlantic makes it more prone to overcast skies and "drizzle," which can make the air feel "raw" or colder than the thermometer suggests. If you are packing for a trip in 2026, both cities require layers, but you are generally more likely to need a heavier coat in London and slightly lighter, more "breathable" clothing for a summer afternoon in the French capital.