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Has the climate in Belém changed?

Belém has warmed about 1.1°F between 1973 and 2020.

About 0.2°F per decade, measured from Belém's official daily weather records, 1973–2020. Individual years still bounce around — some recent ones came in cool — but the long-term line has clearly risen.

Is that a lot? Belém's warming is broadly in line with other cities in Brazil — neither unusually fast nor unusually slow.

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
+0.9°F
1970s
79.5°F
Recent
80.5°F
A steady upward drift
Hot days above 90°F
58 more days
1970s
4 / yr
Recent
62 / yr
More days of serious heat
Rainy days
203 more days
1970s
10 / yr
Recent
213 / yr
Wetter on average

Belém's temperature, year by year

Average temperature for each year from 1973 to 2020.

77°79°81°83°1973: 79.4°F1974: 78.5°F1975: 78.7°F1976: 78.9°F1977: 79.2°F1978: 79.8°F1979: 80.2°F1980: 79.9°F1981: 80.3°F1982: 79.7°F1983: 80.2°F1984: 79.3°F1985: 78.9°F1986: 79.2°F1987: 80.6°F1988: 80.0°F1989: 79.3°F1990: 80.0°F1991: 79.9°F1992: 80.0°F1993: 79.5°F1994: 79.4°F1995: 79.9°F1996: 80.0°F1997: 80.3°F1998: 81.6°F1999: 80.3°F2000: 80.1°F2001: 80.2°F2002: 80.1°F2003: 79.8°F2004: 79.9°F2005: 81.1°F2006: 81.4°F2007: 82.9°F2008: 80.6°F2009: 80.6°F2010: 81.5°F2011: 80.7°F2012: 80.4°F2013: 79.4°F2014: 79.5°F2015: 79.9°F2016: 80.3°F2017: 79.9°F2018: 79.4°F2019: 79.5°F2020: 80.1°Flong-term trend197319801990200020102020
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.

In day-to-day terms, that long-term shift shows up as about 35 more days above 90°F compared with the 1970s.

Methodology & sources

Temperature — the official 1991–2020 climate normals from INMET, Brazil's national meteorological institute, measured at Belem, about 8 km from the city centre.

How we build these numbers →