North Rhine-Westphalia, Germany · population 107,242 · 423 weather stations within 200 km · records 1750 to 2025
Siegen has an average annual daytime high of 11.5°C, based on the 1951 to 1980 baseline. Its warmest month is July, when highs typically reach 20.7°C, and its coldest is January, with overnight lows near -3.4°C.
These figures reflect annual averages, not single-day records. Daily observations are outside this dataset's precision.
Since 1900, Siegen's average temperature has risen by +2.2°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.
Siegen's average annual daytime high is 11.5°C, based on the 1951 to 1980 baseline period. The warmest month is July, with highs averaging 20.7°C, and the coldest is January, with lows averaging -3.4°C.
July is the warmest month in Siegen, with typical daytime highs of 20.7°C.
2006 is the hottest year on record for Siegen, running +2.6°C above the 1951 to 1980 baseline.
Yes. Since 1900, Siegen has warmed by roughly +2.2°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.