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Has the climate in Usulután changed?

Usulután has warmed about 0.6°F between 1991 and 2018.

About 0.3°F per decade, measured from Usulután's official daily weather records, 1991–2018. Individual years still bounce around — some recent ones came in cool — but the long-term line has clearly risen.

Is that a lot? Usulután's climate has warmed more slowly than most other cities in El Salvador.

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.

Average temperature
+0.7°F
1970s
86.7°F
Recent
87.3°F
A steady upward drift

Usulután's temperature, year by year

Average temperature for each year from 1991 to 2018.

83°85°87°89°1991: 87.1°F1993: 86.5°F1997: 87.7°F2001: 86.9°F2002: 87.0°F2003: 85.6°F2004: 86.0°F2005: 84.8°F2006: 85.5°F2007: 86.3°F2008: 85.5°F2009: 87.3°F2010: 85.5°F2011: 86.4°F2012: 87.3°F2013: 86.4°F2014: 86.2°F2015: 88.5°F2016: 88.0°F2017: 87.3°F2018: 87.7°Flong-term trend199120102018
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.

Methodology & sources

Temperature — 1991–2020 normals computed from 24 years of daily observations at Amapala/los Pelonas, a weather station, about 84 km from the city centre. The underlying daily records come from NOAA's global station network.

How we build these numbers →