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Has the climate in Las Guacamayas changed?

How Las Guacamayas's climate has changed

About 0.1°F per decade, measured from Las Guacamayas's official daily weather records, 1971–1991. Individual years still bounce around — some recent ones came in cool — but the long-term line has clearly risen.

Is that a lot? Las Guacamayas's climate has warmed more slowly than most other cities in Mexico.

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
about the same
1970s
81.4°F
Recent
81.6°F
Year-round temperature has barely moved
Hot days above 90°F
about the same
1970s
215 / yr
Recent
215 / yr
About the same number of heat days
Rainy days
about the same
1970s
66 / yr
Recent
66 / yr
Rainfall pattern about the same

Las Guacamayas's temperature, year by year

Average temperature for each year from 1971 to 1991.

79°81°83°1971: 80.3°F1972: 82.6°F1973: 81.8°F1974: 81.5°F1975: 81.3°F1976: 80.8°F1977: 82.6°F1978: 81.9°F1979: 81.8°F1980: 82.4°F1981: 81.1°F1982: 82.6°F1983: 81.6°F1984: 81.0°F1985: 81.3°F1986: 81.9°F1987: 82.7°F1989: 80.9°F1991: 81.6°Flong-term trend197119801991
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 3 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.

-3.0°-2.5°-2.0°-1.5°-1.0°-0.5°0.0°+0.5°+1.0°January: -0.5°F-0.5JFebruary: -0.2°F-0.2FMarch: +0.5°F+0.5MApril: +0.7°F+0.7AMay: +0.6°F+0.6MJune: -1.7°F-1.7JJuly: -2.3°F-2.3JAugust: -3.0°F-3.0ASeptember: -2.6°F-2.6SOctober: -2.4°F-2.4ONovember: -2.1°F-2.1NDecember: -1.5°F-1.5D

August has cooled the most — about 3.0°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 Petacalco, about 12 km from the city centre.

How we build these numbers →