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Has the climate in Comitán changed?

Comitán has warmed about 0.6°F between 1989 and 2020.

About 0.2°F per decade, measured from Comitán's official daily weather records, 1989–2020. Individual years still bounce around — some recent ones came in cool — but the long-term line has clearly risen.

Is that a lot? Comitán'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
1 fewer night
1970s
1 / yr
Recent
0 / yr
Milder winters — fewer frosts
Average temperature
+0.5°F
1970s
65.8°F
Recent
66.3°F
A steady upward drift
Hot days above 90°F
3 more days
1970s
3 / yr
Recent
6 / yr
More days of serious heat
Rainy days
31 fewer days
1970s
112 / yr
Recent
81 / yr
Drier on average

Comitán's temperature, year by year

Average temperature for each year from 1989 to 2020.

63°65°67°69°1989: 67.9°F1990: 65.1°F1991: 66.3°F1992: 66.1°F1993: 65.6°F1994: 65.0°F1995: 65.4°F1997: 64.9°F1998: 65.9°F1999: 64.5°F2000: 64.7°F2001: 64.5°F2002: 64.6°F2005: 66.0°F2006: 65.3°F2007: 65.2°F2008: 64.4°F2009: 65.1°F2010: 65.8°F2011: 65.6°F2012: 65.8°F2014: 65.4°F2015: 66.2°F2016: 66.8°F2017: 66.0°F2018: 65.8°F2019: 67.2°F2020: 67.5°Flong-term trend19891990200020102020
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 2 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°+2.5°+3.0°+3.5°+4.0°January: +1.4°F+1.4JFebruary: +1.5°F+1.5FMarch: +1.5°F+1.5MApril: +2.2°F+2.2AMay: +2.0°F+2.0MJune: +2.1°F+2.1JJuly: +2.1°F+2.1JAugust: +2.7°F+2.7ASeptember: +3.5°F+3.5SOctober: +2.1°F+2.1ONovember: +2.2°F+2.2NDecember: +1.2°F+1.2D

September has warmed the most — about 3.5°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 Comitan (obs), inside the city.

How we build these numbers →