Orange Free State, South Africa · population 55,196 · 84 weather stations within 200 km · records 1859 to 2025
Heilbron has an average annual daytime high of 24.1°C, based on the 1951 to 1980 baseline. Its warmest month is January, when highs typically reach 28.1°C, and its coldest is July, with overnight lows near -0.7°C.
These figures reflect annual averages, not single-day records. Daily observations are outside this dataset's precision.
Since 1900, Heilbron's average temperature has risen by +1.7°C. Compared to the earliest station records that begin in 1859, warming totals +1.8°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.
Heilbron's average annual daytime high is 24.1°C, based on the 1951 to 1980 baseline period. The warmest month is January, with highs averaging 28.1°C, and the coldest is July, with lows averaging -0.7°C.
January is the warmest month in Heilbron, with typical daytime highs of 28.1°C.
2015 is the hottest year on record for Heilbron, running +2.1°C above the 1951 to 1980 baseline.
Yes. Since 1900, Heilbron has warmed by roughly +1.7°C.
April 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.