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Has the climate in Montemorelos changed?

Montemorelos has warmed about 2.5°F between 1971 and 2011.

About 0.7°F per decade, measured from Montemorelos's official daily weather records, 1971–2011. Individual years still bounce around — some recent ones came in cool — but the long-term line has clearly risen.

Is that a lot? Montemorelos'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
3 fewer nights
1970s
5 / yr
Recent
2 / yr
Milder winters — fewer frosts
Average temperature
+2.3°F
1970s
70.9°F
Recent
73.2°F
A steady upward drift
Hot days above 90°F
17 more days
1970s
126 / yr
Recent
143 / yr
More days of serious heat
Rainy days
15 fewer days
1970s
77 / yr
Recent
62 / yr
Drier on average

Montemorelos's temperature, year by year

Average temperature for each year from 1971 to 2011.

67°69°71°73°75°77°79°1971: 72.3°F1972: 70.7°F1973: 69.8°F1974: 71.4°F1975: 70.6°F1976: 68.4°F1977: 70.6°F1978: 70.5°F1979: 70.4°F1980: 72.3°F1981: 71.0°F1982: 72.3°F1983: 71.0°F1984: 71.9°F1985: 73.0°F1989: 74.1°F1990: 74.1°F1991: 75.6°F1992: 73.4°F1993: 74.2°F1994: 74.7°F1995: 74.8°F1996: 74.6°F1997: 74.1°F1998: 77.3°F1999: 75.9°F2000: 77.8°F2001: 72.9°F2002: 72.1°F2003: 71.8°F2004: 71.8°F2005: 72.2°F2008: 70.6°F2009: 72.6°F2010: 69.6°F2011: 73.3°Flong-term trend197119801990200020102011
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.

-0.5°0.0°+0.5°+1.0°+1.5°+2.0°January: +1.6°F+1.6JFebruary: +1.4°F+1.4FMarch: -0.3°F-0.3MApril: +0.6°F+0.6AMay: +1.2°F+1.2MJune: +1.2°F+1.2JJuly: +0.9°F+0.9JAugust: +1.2°F+1.2ASeptember: +0.4°F+0.4SOctober: +0.6°F+0.6ONovember: +0.1°F+0.1NDecember: +0.3°F+0.3D

January has warmed the most — about 1.6°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 Montemorelos, inside the city.

How we build these numbers →