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Has the climate in Pénjamo changed?

Pénjamo has warmed about 2.6°F between 1971 and 2012.

About 0.7°F per decade, measured from Pénjamo's official daily weather records, 1971–2012. Individual years still bounce around — some recent ones came in cool — but the long-term line has clearly risen.

Is that a lot? Pénjamo'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
about the same
1970s
0 / yr
Recent
0 / yr
Winters about as cold as before
Average temperature
+2.5°F
1970s
65.9°F
Recent
68.4°F
A steady upward drift
Hot days above 90°F
22 more days
1970s
5 / yr
Recent
27 / yr
More days of serious heat
Rainy days
14 fewer days
1970s
72 / yr
Recent
58 / yr
Drier on average

Pénjamo's temperature, year by year

Average temperature for each year from 1971 to 2012.

63°65°67°69°71°1971: 66.4°F1972: 67.2°F1973: 66.6°F1974: 67.0°F1975: 66.3°F1976: 65.8°F1977: 64.8°F1978: 64.6°F1979: 64.4°F1980: 65.4°F1981: 65.6°F1982: 66.6°F1983: 65.5°F1984: 65.9°F1985: 68.0°F1986: 69.0°F1987: 69.0°F1988: 70.2°F1989: 67.6°F1990: 67.8°F1991: 69.2°F1992: 68.6°F1996: 69.5°F1997: 68.4°F1998: 68.9°F2000: 69.6°F2001: 69.2°F2002: 69.1°F2003: 69.8°F2004: 69.8°F2005: 70.8°F2006: 70.4°F2007: 66.7°F2008: 67.8°F2009: 67.3°F2010: 66.2°F2011: 67.3°F2012: 66.0°Flong-term trend197119801990200020102012
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 9 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.

0.0°+0.5°+1.0°+1.5°+2.0°January: +0.7°F+0.7JFebruary: +1.5°F+1.5FMarch: +0.9°F+0.9MApril: +1.3°F+1.3AMay: +1.1°F+1.1MJune: +1.7°F+1.7JJuly: +1.5°F+1.5JAugust: +1.7°F+1.7ASeptember: +1.0°F+1.0SOctober: +1.5°F+1.5ONovember: +1.0°F+1.0NDecember: +0.7°F+0.7D

June has warmed the most — about 1.7°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 La Golondrina, about 2 km from the city centre.

How we build these numbers →