According to Google the weather in London in April is highly unpredictable, typically featuring a mixture of sunshine and "April showers". The weather can range from warm, sunny days where a light shirt is sufficient, to cold, windy, days requiring a warm coat, often within the same week; sometimes even the same day. The weather can change quickly in April.

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 gradually increase as the month progresses.
• Rainfall: April is generally one of London's driest months, but rain is still common. There are typically about 14-16 days with some rainfall, but the rain usually comes in light, passing showers rather than prolonged downpours.
• Sunshine:London averages around 5-6 hours of sunshine per day, and the amount of daylight increases significantly during April.
• Daylight: Expect nearly 14 hours of daylight on average, with sunrise around 6:00 AM and sunset near 8:00 PM by mid-month.

What to Pack

Overall, April is a lovely time to visit London, as parks and gardens begin to bloom, but preparation for varied weather conditions is a must. Due to the changeable nature of the weather, layering is key.

• Layers: Pack a variety of tops, including short-sleeved shirts, light long-sleeved tops, and cardigans or sweaters that can be easily added or removed as temperatures change throughout the day.
• Outerwear: A high-quality, showerproof 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 will likely 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 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.