Guyane, French Guiana · population 61,550 · 6 weather stations within 200 km · records 1845 to 2025
Cayenne has an average annual daytime high of 30.0°C, based on the 1951 to 1980 baseline. Its warmest month is September, when highs typically reach 31.8°C, and its coldest is July, with overnight lows near 22.3°C.
These figures reflect annual averages, not single-day records. Daily observations are outside this dataset's precision.
Since 1900, Cayenne's average temperature has risen by +1.5°C. Compared to the earliest station records that begin in 1845, warming totals +1.6°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.
Cayenne's average annual daytime high is 30.0°C, based on the 1951 to 1980 baseline period. The warmest month is September, with highs averaging 31.8°C, and the coldest is July, with lows averaging 22.3°C.
September is the warmest month in Cayenne, with typical daytime highs of 31.8°C.
2023 is the hottest year on record for Cayenne, running +1.7°C above the 1951 to 1980 baseline.
Yes. Since 1900, Cayenne has warmed by roughly +1.5°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.