Wales, United Kingdom · population 302,139 · 178 weather stations within 200 km · records 1750 to 2025
Cardiff has an average annual daytime high of 13.4°C, based on the 1951 to 1980 baseline. Its warmest month is August, when highs typically reach 19.7°C, and its coldest is February, with overnight lows near 1.9°C.
These figures reflect annual averages, not single-day records. Daily observations are outside this dataset's precision.
Since 1900, Cardiff's average temperature has risen by +2.1°C. Compared to the earliest station records that begin in 1750, warming totals +2.5°C.
20-year smoothed annual temperature reconstructed from station anomalies. Dashed line: 1951–1980 baseline.
Daytime highs sit within a comfortable 15°C to 26°C range.
Cardiff's average annual daytime high is 13.4°C, based on the 1951 to 1980 baseline period. The warmest month is August, with highs averaging 19.7°C, and the coldest is February, with lows averaging 1.9°C.
August is the warmest month in Cardiff, with typical daytime highs of 19.7°C.
2006 is the hottest year on record for Cardiff, running +2.1°C above the 1951 to 1980 baseline.
Yes. Since 1900, Cardiff has warmed by roughly +2.1°C.
May to September typically offers the most comfortable daytime highs, in the 15°C to 26°C range.
Baseline period 1951 to 1980. Monthly averages are the mean of station observations weighted by proximity. Warming trend is the 20-year smoothed anomaly against that baseline.