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Has the climate in Saint-Denis changed?

How Saint-Denis's climate has changed

About 0.0°F per decade, measured from Saint-Denis's official daily weather records, 1976–2024. Individual years still bounce around — some recent ones came in cool — but the long-term line has clearly risen.

Is that a lot? Saint-Denis's climate has warmed more slowly than most other cities across Africa.

What has actually changed

Each card compares the 1970s (the first ten years of the record) with recent years (the last ten) — the same span the headline and the chart use.

Freezing nights
about the same
1970s
0 / yr
Recent
0 / yr
Winters about as cold as before
Average temperature
about the same
1970s
75.4°F
Recent
75.6°F
Year-round temperature has barely moved
Hot days above 90°F
3 more days
1970s
4 / yr
Recent
7 / yr
More days of serious heat
Rainy days
38 more days
1970s
119 / yr
Recent
157 / yr
Wetter on average

Saint-Denis's temperature, year by year

Average temperature for each year from 1976 to 2024.

72°74°76°78°1976: 76.2°F1977: 76.5°F1978: 75.8°F1979: 75.9°F1980: 75.4°F1981: 75.4°F1982: 74.6°F1983: 75.1°F1984: 74.2°F1985: 75.1°F1986: 74.9°F1987: 75.8°F1988: 75.4°F1989: 75.4°F1990: 75.2°F1991: 75.1°F1992: 75.1°F1993: 74.9°F1994: 75.5°F1995: 74.7°F1996: 74.8°F1997: 75.1°F1998: 75.9°F1999: 75.1°F2000: 75.2°F2001: 75.9°F2002: 75.7°F2003: 75.9°F2004: 75.5°F2005: 75.0°F2006: 75.2°F2007: 75.5°F2008: 75.4°F2009: 76.0°F2010: 75.9°F2011: 76.1°F2012: 75.9°F2013: 75.6°F2014: 76.6°F2015: 76.0°F2016: 75.3°F2017: 75.9°F2018: 76.2°F2019: 77.1°F2020: 74.4°F2021: 74.9°F2022: 73.4°F2023: 74.9°F2024: 75.2°Flong-term trend1976198019902000201020202024
a warmer-than-average year a cooler-than-average year

Each bar is one year. Most recent years sit above the older ones. Some recent years still came in cool — warming is a slope, not a straight climb.

When in the year the change shows up

How much warmer each month is now than in the 1970s. Useful if you garden or care about a particular season — otherwise the headline above already has the answer.

0.0°+0.5°+1.0°January: +0.6°F+0.6JFebruary: +0.9°F+0.9FMarch: +0.5°F+0.5MApril: +0.3°F+0.3AMay: +0.5°F+0.5MJune: +0.3°F+0.3JJuly: +1.0°F+1.0JAugust: +0.4°F+0.4ASeptember: +0.5°F+0.5SOctober: +0.4°F+0.4ONovember: +0.5°F+0.5NDecember: +0.5°F+0.5D

July has warmed the most — about 1.0°F. The warming runs across the whole year, not just one season.

Methodology & sources

Temperature — 1991–2020 normals computed from 26 years of daily observations at ST Denis Gillot, a weather station, about 6 km from the city centre. The underlying daily records come from NOAA's global station network.

How we build these numbers →