Climate averages 1991–2020
Cardiff weather
in June.
A mild, moderately wet month: the 3rd warmest and the 3rd driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
June is a mild month in Cardiff: daytime highs average 17.7°C and nights cool to about 11.4°C. By daytime temperature it is the 3rd warmest of the 12 months.
Expect about 71 mm of rain on roughly 11 days, which makes June a moderately wet month (the 3rd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 16 h 32 min on an average June day.
The nearest other city in this atlas is Newport (17 km away). In June its highs average 18.6°C, 0.9°C warmer than Cardiff, with 64 mm of rain.
Among the 143 cities listed in the United Kingdom, Cardiff ranks joint 85th of 143 for the warmest June highs and joint 103rd of 143 for the driest June (rainfall, lowest first). The mean June high of those 143 cities is 17.9°C; Cardiff is 0.2°C cooler than that mean.
From June to July, average highs rise by 1.7°C to 19.4°C, and monthly rainfall rises from 71 mm to 74 mm.
The annual picture
June in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Cardiff climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 7.4°C3.3°C | 3.3°C | 95 | 14.5 | 8.48 h |
| February | 7.8°C3.0°C | 3.0°C | 75 | 11.3 | 9.910 h |
| March | 9.6°C3.9°C | 3.9°C | 68 | 11.7 | 11.812 h |
| April | 12.2°C5.5°C | 5.5°C | 70 | 11.6 | 13.814 h |
| May | 15.2°C8.5°C | 8.5°C | 73 | 12.3 | 15.616 h |
| June, selected | 17.7°C11.4°C | 11.4°C | 71 | 11.0 | 16.517 h |
| July | 19.4°C13.4°C | 13.4°C | 74 | 11.6 | 16.116 h |
| August | 19.2°C13.5°C | 13.5°C | 87 | 12.3 | 14.615 h |
| September | 17.2°C11.5°C | 11.5°C | 74 | 11.0 | 12.713 h |
| October | 13.8°C9.0°C | 9.0°C | 106 | 14.0 | 10.711 h |
| November | 10.3°C6.1°C | 6.1°C | 102 | 14.5 | 8.99 h |
| December | 7.9°C3.9°C | 3.9°C | 107 | 13.7 | 7.98 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
June in nearby cities
- Newport in JuneUnited Kingdom · 17 kmHigh 18.6°C · Low 11.1°C · 64 mm rain
- Weston-super-Mare in JuneUnited Kingdom · 21 kmHigh 18.3°C · Low 11.5°C · 60 mm rain
- Bristol in JuneUnited Kingdom · 41 kmHigh 18.6°C · Low 11.2°C · 62 mm rain
- Swansea in JuneUnited Kingdom · 55 kmHigh 16.9°C · Low 11.6°C · 79 mm rain
- Bath in JuneUnited Kingdom · 58 kmHigh 18.2°C · Low 10.7°C · 60 mm rain
- Gloucester, United Kingdom in JuneUnited Kingdom · 78 kmHigh 18.7°C · Low 10.8°C · 59 mm rain
- Exeter in JuneUnited Kingdom · 88 kmHigh 18.0°C · Low 11.3°C · 61 mm rain
- Cheltenham in JuneUnited Kingdom · 89 kmHigh 18.6°C · Low 10.7°C · 62 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Cardiff) is explained once on the Cardiff year overview and on the Sources, method and limits page.