Average temperatures, rainfall and packing tips for London, United Kingdom in December
December in London is typically cool, with average daytime highs around 10°C and nights near 6°C. It is one of the cooler months of London's year.
Expect some rain: around 40 mm falls in London during December on average.
If your dates are flexible, the most comfortable months in London are usually May, June, July, August and September.
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In December, London averages a daytime high of about 10°C and a night-time low of around 6°C, based on recent historical data.
Expect some rain: around 40 mm falls in London during December on average.
December is a workable time to visit London, with cool days - just pack accordingly. If your dates are flexible, the most comfortable months in London are usually May, June, July, August and September.