Northern Ireland, United Kingdom · population 83,652 · 85 weather stations within 200 km · records 1750 to 2025
Derry has an average annual daytime high of 11.9°C, based on the 1951 to 1980 baseline. Its warmest month is August, when highs typically reach 17.6°C, and its coldest is February, with overnight lows near 0.9°C.
These figures reflect annual averages, not single-day records. Daily observations are outside this dataset's precision.
Since 1900, Derry's average temperature has risen by +1.8°C. Compared to the earliest station records that begin in 1750, warming totals +2.4°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.
Derry's average annual daytime high is 11.9°C, based on the 1951 to 1980 baseline period. The warmest month is August, with highs averaging 17.6°C, and the coldest is February, with lows averaging 0.9°C.
August is the warmest month in Derry, with typical daytime highs of 17.6°C.
2021 is the hottest year on record for Derry, running +1.7°C above the 1951 to 1980 baseline.
Yes. Since 1900, Derry has warmed by roughly +1.8°C.
June 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.