According to Google the London weather in October tends to be cool, overcast, and sometimes wet. Though most travelers don't expect a lot of sunshine during an October trip to London. October in London is cool, mild, and often damp, with average daytime highs around 16°C (60°F) at the beginning of the month and lows near 10°C (50°F) at night time. Expect a mix of sunny days and frequent rain, with around 10–15 days of rainfall during the month, making it a good idea to bring waterproof clothing and layers.

Average Weather Conditions

Based on long-term averages, you can generally expect:

• Temperature: Daily high temperatures average around 13°C to 15°C (55°F to 59°F), with overnight lows typically falling to about 5°C to 7°C (40°F to 45°F). Temperatures and daylight length gradually decrease as the month progresses.
• Rainfall: October is usually a wet month in London's, rain is common.

What to Pack

October can sometimes be a surprising month with warm days and lovely autumn colours in the parks and gardens. However,preparation for varied weather conditions is a advised. Due to the changeable nature of the weather, layering is key.

• Layers: Pack a variety of tops, including both short-sleeved shirts and long-sleeved tops, and cardigans or sweaters that can be easily added or removed as temperatures change throughout the day.
• Outerwear: A high-quality, raincoat or trench coat is essential. A light, packable umbrella is also highly recommended.
• Footwear: Bring comfortable, durable, and preferably waterproof walking shoes, as you could be walking a lot and conditions might be wet.
• Accessories: A scarf and hat might be useful for chilly mornings or evenings. Sunglasses are also a good idea for the rare sunny spells.

You can check the specific short-term forecast closer to your travel date for more precise planning e.g., via the Met Office or "BBC Weather.