June · United Kingdom
Best time to visit Cardiff in June Weather, crowds & prices
Weather in Cardiff in June
Average temperature 15°C, 49 mm of rain, about 26 days with 6+ hours of sunshine and 80% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
June score
9.0/10
Ranked #1 of 12 months
- Avg temp
- 15°C
- Rainfall
- 49 mm
- Humidity
- 80%
- Days with 6h+ sun
- 26
- Crowd Density
- Moderate Crowds
- Average Expenses
- $$$ · Peak Season Rates ($$$)
June in Cardiff scores 9.0/10 for sightseeing and cultural travel - the single best month of the year. Expect around 15°C, 49 mm of rain, and roughly 26 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.
June in Cardiff — the year's strongest window
June averages 15°C (60°F), the range most people find easiest for walking a city all day without either overheating or losing daylight to weather.
Rainfall runs 49 mm, so plan one flexible day in three; you still get about 26 days with 6+ hours of sunshine and 16.4 hours of daylight.
On our climate-comfort scale this is the top-ranked month of the year for Cardiff at 9/10 — the reference point every other month on this page is measured against.
Pack layers you can shed by midday plus one warm layer for the evening, a packable rain layer.
Plan for peak pricing, with crowds are moderate. 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 June?
- In June, Cardiff averages 15°C, 49 mm of rain, and about 26 days with 6+ hours of sunshine. Its climate-comfort score is 9.0/10.
- Is June a good time to visit Cardiff?
- June earns a 9.0/10 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 June?
- Expect about 49 mm of rain in June. Average humidity is 80% and there are about 26 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.