July · United Kingdom
Best time to visit Cardiff in July Weather, crowds & prices
Weather in Cardiff in July
Average temperature 17°C, 77 mm of rain, about 20 days with 6+ hours of sunshine and 81% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
July score
8.2/10
Ranked #3 of 12 months
- Avg temp
- 17°C
- Rainfall
- 77 mm
- Humidity
- 81%
- Days with 6h+ sun
- 20
- Crowd Density
- Peak Tourist Rush
- Average Expenses
- $$$ · Peak Season Rates ($$$)
July in Cardiff scores 8.2/10 for sightseeing and cultural travel - one of the top 12-month picks (#3). Expect around 17°C, 77 mm of rain, and roughly 20 days with 6+ hours of sunshine this month.
Cardiff mixes a Victorian arcades core, Cardiff Castle, and bay regeneration with easy access to Welsh coast and valleys. Best window: late spring through early autumn.
July in Cardiff: strong conditions, 3rd of 12
July averages 17°C (62°F), the range most people find easiest for walking a city all day without either overheating or losing daylight to weather.
Rainfall runs 77 mm, so plan one flexible day in three; you still get about 20 days with 6+ hours of sunshine and 16 hours of daylight.
It scores 8.2/10 here, 3rd of 12 months, against 9/10 in the destination's best month.
Pack layers you can shed by midday plus one warm layer for the evening, a packable rain layer.
Figure on peak pricing, with this is one of the busiest months here. You are paying the year's highest rates for the year's best conditions — book early or shift a few weeks either side.
Frequently asked
- What is the weather like in Cardiff in July?
- In July, Cardiff averages 17°C, 77 mm of rain, and about 20 days with 6+ hours of sunshine. Its climate-comfort score is 8.2/10.
- Is July a good time to visit Cardiff?
- July earns a 8.2/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Cardiff in July?
- Expect about 77 mm of rain in July. Average humidity is 81% and there are about 20 days with 6+ hours of sunshine.
Curated in Cardiff
Tickets & experiences
Things to do in Cardiff
Cardiff, United Kingdom. Live activities and tours from GetYourGuide, matched to this destination.