Acre, Brazil · population 257,642 · 5 weather stations within 200 km · records 1917 to 2025
Rio Branco has an average annual daytime high of 31.2°C, based on the 1951 to 1980 baseline. Its warmest month is September, when highs typically reach 33.5°C, and its coldest is July, with overnight lows near 18.2°C.
These figures reflect annual averages, not single-day records. Daily observations are outside this dataset's precision.
Since 1900, Rio Branco's average temperature has risen by 0.0°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.
Rio Branco's average annual daytime high is 31.2°C, based on the 1951 to 1980 baseline period. The warmest month is September, with highs averaging 33.5°C, and the coldest is July, with lows averaging 18.2°C.
September is the warmest month in Rio Branco, with typical daytime highs of 33.5°C.
2023 is the hottest year on record for Rio Branco, running +2.0°C above the 1951 to 1980 baseline.
Yes. Since 1900, Rio Branco has warmed by roughly 0.0°C.
any time of year 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.