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Has the climate in Purísima de Bustos changed?

Purísima de Bustos has warmed about 1.7°F between 1972 and 2012.

About 0.5°F per decade, measured from Purísima de Bustos's official daily weather records, 1972–2012. Individual years still bounce around — some recent ones came in cool — but the long-term line has clearly risen.

Is that a lot? Purísima de Bustos's warming is broadly in line with other cities in Mexico — 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
20 more nights
1970s
4 / yr
Recent
24 / yr
Colder winters — more frosts
Average temperature
+1.1°F
1970s
65.3°F
Recent
66.4°F
A steady upward drift
Hot days above 90°F
47 more days
1970s
33 / yr
Recent
80 / yr
More days of serious heat
Rainy days
5 more days
1970s
69 / yr
Recent
74 / yr
Wetter on average

Purísima de Bustos's temperature, year by year

Average temperature for each year from 1972 to 2012.

62°64°66°68°70°1972: 66.3°F1973: 66.5°F1974: 66.0°F1975: 64.5°F1976: 64.5°F1977: 65.1°F1978: 64.5°F1979: 64.8°F1980: 65.4°F1981: 65.7°F1982: 65.4°F1983: 64.4°F1984: 63.8°F1985: 63.4°F1986: 63.4°F1988: 64.5°F1989: 64.8°F1990: 65.1°F1991: 65.3°F1992: 63.8°F1993: 66.0°F1994: 67.2°F1995: 67.8°F1996: 67.0°F1998: 68.3°F1999: 65.5°F2000: 66.6°F2001: 66.4°F2002: 67.5°F2003: 66.4°F2004: 65.7°F2005: 67.3°F2006: 66.4°F2007: 65.8°F2009: 66.6°F2010: 64.5°F2011: 66.7°F2012: 66.4°Flong-term trend197219801990200020102012
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 7 more freezing nights a year and about 28 more days above 90°F compared with the 1970s.

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.

-1.0°-0.5°0.0°+0.5°+1.0°+1.5°+2.0°+2.5°January: -0.5°F-0.5JFebruary: +0.8°F+0.8FMarch: +1.1°F+1.1MApril: +2.1°F+2.1AMay: +2.2°F+2.2MJune: +1.6°F+1.6JJuly: +1.6°F+1.6JAugust: +1.8°F+1.8ASeptember: +1.5°F+1.5SOctober: +0.7°F+0.7ONovember: -0.9°F-0.9NDecember: -0.9°F-0.9D

May has warmed the most — about 2.2°F. The warming runs across the whole year, not just one season.

Methodology & sources

Temperature — the official 1991–2020 climate normals from CONAGUA / SMN, Mexico's national weather service, measured at Leon (dge), about 22 km from the city centre.

How we build these numbers →