Weather in Cardiff in June 2025
Average weather
Average temperature in Cardiff in June
Going from a maximum of +26°C during the day to a minimum of +9°C during the night, the temperature in June averages around +22°C.
The average maximum temperature goes down 12% by the end of the month, compared with the beginning of the month, from +20°C to +18°C.
Is Cardiff warm or cold in June?
Cardiff is typically mild in June.
Maximum temperatures go up compared to the previous month from +16°C to +19°C. The minimum temperature also goes up from +9°C to +12°C.
Pack a light jacket as it will be warm in the day and cool in the evenings.
June is one of the warmest months in Cardiff, here is the comparison with other months:
Water temperature in Cardiff in June
Water in Cardiff in June is Cold. It varies from +12°C to +15°C, with an average of +14°C. The air temperature averaging +19°C is higher than the water temperature.
In June, water temperatures are average relative to the rest of the year:
Can you swim in Cardiff in June?
Climate in Cardiff in June
| May | June | July | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +16°C | +19°C | +21°C | ||||
| Min. temperature | ||||||
| 0°C | +3°C | +6°C | ||||
| Max. temperature | ||||||
| +27°C | +30°C | +34°C | ||||
| Rainfall | ||||||
| 72 mm | 74 mm | 74 mm | ||||
| Wind | ||||||
| 4 m/s | 4 m/s | 4 m/s | ||||
| Avg. water temperature | ||||||
| +11°C | +14°C | +16°C | ||||
| Humidity | ||||||
| 76% | 77% | 77% | ||||
| Air pressure | ||||||
| 1014 HPa | 1015 HPa | 1015 HPa | ||||
| Sunny days | ||||||
| 5 | 4 | 5 | ||||
| Cloudy days | ||||||
| 10 | 10 | 10 | ||||
| Rainy days | ||||||
| 15 | 15 | 16 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
June weather is still as ok as in May. It’s getting warmer as June arrives. The average maximum temperature goes up from +16°C to +19°C during the day. Prepare for more rain. Average rainfall goes from 72 mm to 74 mm. Humidity rises from 76% to 77%. The average wind speed doesn’t change much during June, staying around 4 m/s. The days becoming less sunny, going from 5 sunny days in May to 4 in June.
July brings much the same weather, it remains ok.
Wind
The average wind speed is 4 m/s getting up to 8 m/s which is a medium breeze. You can feel it, especially getting out of the water.
The average wind speed in Cardiff is gradually decreasing during June, going from 6 m/s to 5 m/s over the course of the month.
Rain
How was the weather last June in Cardiff?
Climate Change over Years
The climate in Cardiff in June has not changed much over the last 43 years.
The average temperature was the lowest in 1979 (+12°C) and the highest in 2022 (+16°C). The driest year was 2010 with only 736 mm of rainfall, and the wettest year was 2022 with 1906 mm.
FAQ
Is June a good time to visit Cardiff?
Can you sunbathe in Cardiff in June?
Can you swim in Cardiff in June?
Is Cardiff rainy in June?
Is it sunny in Cardiff in June?
Other cities in United Kingdom
Monthly weather in Cardiff
Source of the data
For this page, we’ve looked at the typical weather in Cardiff, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.