United Kingdom London Weather in August — Climate Guide
August in London is Excellent
August is Excellent for London.
School holidays in full swing — major museums queue 30+ minutes. Notting Hill Carnival closes the month with 2 million attendees on the last weekend (Sunday family day, Monday parade) — Europe's biggest street festival celebrating Caribbean culture. Bank holiday Monday August 25 is the final summer hurrah. Many West End shows run reduced schedules in August (cast holidays).
Travel score
Summer + Notting Hill Carnival + Korean Liberation Day
August Weather at a Glance
August averages 72°F / 22°C highs and 57°F / 14°C lows — similar to July. 8 rainy days, 50mm. Humidity 75% + 6 hours of sunshine. Heatwave 85°F+ / 30°C+ possible. August Bank Holiday last Monday + Notting Hill Carnival (world's largest carnival outside the Americas, started 1966, 2 million+ spectators).
August Travel Advice
Short sleeves + cardigan + SPF 30 + water bottle + walking shoes. Last Sun-Mon of August Notting Hill Carnival signature (Bank Holiday weekend). August Korean Liberation Day (Aug 15) 5-day holiday. BBC Proms last week of August Last Night of the Proms signature.
Flying In from Overseas
Korean Liberation Day 5-day stack — Asia-London $1,260-1,960 round-trip. Post-Liberation Day value.
August Pricing Trends
Liberation Day + Notting Hill Carnival 1-week 1.5x — Covent Garden 3-star $350-630/night.
London August Weather Stats
Avg High
22°C
Avg Low
14°C
Rainy Days
7
50mm total
Sunshine
6.5h
Daily avg
Humidity
66%
Mild
UV Index
5
Moderate
Wind
12 km/h
Gusts 23
Sea Temp
18°C
Avg water temp
Crowds
Very busy
At attractions
August Sunrise & Sunset
Air Quality
PM2.5
22 μg/m³
PM10
33 μg/m³
Status
Moderate
Feels-Like Temperature & Wind
Feels like
Daytime
22°C
Nighttime
13°C
Humidity and wind affect how the actual temperature feels.
Wind
12 km/h
Max gust 23 km/h
Activities Recommended for August
August Travel Pros & Cons
Pros
- Notting Hill Carnival spectacle
- Edinburgh Festival day trips by train
- Outdoor markets at peak
Cons
- School holiday crowds peak
- Hotel prices at yearly max
- West End cast holidays mean some understudies
August Events & Festivals
- Notting Hill Carnival (last weekend)
- BBC Proms continues
- Great British Beer Festival
London in August — Full Picture
School holidays in full swing — major museums queue 30+ minutes. Notting Hill Carnival closes the month with 2 million attendees on the last weekend (Sunday family day, Monday parade) — Europe's biggest street festival celebrating Caribbean culture. Bank holiday Monday August 25 is the final summer hurrah. Many West End shows run reduced schedules in August (cast holidays).
What to Wear & What to Pack
Same as July — t-shirts, sundresses. Light cardigan for evenings. Comfortable walking shoes — you'll do 20km/day at Notting Hill Carnival.
Packing Checklist
Seasonal Weather Overview
Spring (Mar·Apr·May)
14°C
6.3°C
8.7/mo
Summer (Jun·Jul·Aug)
Current21.7°C
13.3°C
6.7/mo
Autumn (Sep·Oct·Nov)
15°C
8°C
9.3/mo
Winter (Dec·Jan·Feb)
8.3°C
2.3°C
10.3/mo
London Monthly Weather Comparison
| Month | High | Low | Rain | Sun | Humid | UV | Crowd | Price |
|---|---|---|---|---|---|---|---|---|
| 8° | 2° | 11d·55mm | 1.5h | 80% | 1 | Quiet | Low season | |
| 9° | 2° | 9d·40mm | 2h | 78% | 2 | Quiet | Low season | |
| 11° | 4° | 9d·40mm | 3.5h | 73% | 3 | Moderate | Shoulder | |
| 14° | 6° | 9d·45mm | 5h | 70% | 4 | Moderate | Shoulder | |
| 17° | 9° | 8d·45mm | 6.5h | 68% | 5 | Busy | Peak | |
| June (Best) | 20° | 12° | 7d·45mm | 7h | 65% | 6 | Busy | Peak |
| July (Best) | 23° | 14° | 6d·45mm | 7h | 65% | 6 | Very busy | Peak |
| 22° | 14° | 7d·50mm | 6.5h | 66% | 5 | Very busy | Peak | |
| 19° | 11° | 8d·50mm | 5h | 70% | 4 | Busy | Peak | |
| 15° | 8° | 10d·70mm | 3.5h | 76% | 3 | Moderate | Shoulder | |
| 11° | 5° | 10d·65mm | 2h | 79% | 1 | Moderate | Shoulder | |
| 8° | 3° | 11d·55mm | 1.5h | 81% | 1 | Very busy | Peak |
View Other Months
London August Hotel Picks
Frequently Asked Questions
Is August a good time to visit London?
London in August is Excellent. Tourist crowds are very busy and flight/hotel prices are peak.
What's the average temperature in London in August?
London August averages a high of 22°C and a low of 14°C.
Does it rain much in London in August?
London August averages 50mm of rainfall over about 7 rainy days.
What should I wear in London in August?
Same as July — t-shirts, sundresses. Light cardigan for evenings. Comfortable walking shoes — you'll do 20km/day at Notting Hill Carnival.
What time are sunrise and sunset in London in August?
London August sunrise is 05:40 and sunset is 20:30, with 14h 50m of daylight.
What's the air quality like in London in August?
London August air quality (AQI) averages 50, rated Good. PM2.5 averages 22μg/m³.
What activities are recommended in London in August?
In August, London is great for Notting Hill Carnival, Edinburgh day trip (train), Borough Market grazing.
Is August peak season in London?
London August crowds are very busy and prices are peak. Advance reservations are strongly recommended.
Best Months to Visit London
View Other Months
Why you can trust weather guide
Based in Chiang Mai for 8+ years, with 30+ countries visited across Southeast Asia, Japan, and Europe. Every detail in this guide is primary-source verified as of April 2026, with prices auto-refreshed via live exchange rate APIs. This isn't AI-generated boilerplate — it's written from the perspective of someone who has actually been there.