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Has the climate in Ceiba changed?

Ceiba has warmed about 1.7°F since 1971.

About 0.4°F per decade, measured from Ceiba's official daily weather records, 1971–2025. Individual years still bounce around — some recent ones came in cool — but the long-term line has clearly risen.

Is that a lot? Ceiba's warming is broadly in line with other cities in Puerto Rico — 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
+1.5°F
1970s
79.6°F
Recent
81.1°F
A steady upward drift
Hot days above 90°F
28 more days
1970s
22 / yr
Recent
50 / yr
More days of serious heat
Rainy days
32 fewer days
1970s
200 / yr
Recent
168 / yr
Drier on average

Ceiba's temperature, year by year

Average temperature for each year from 1971 to 2025.

77°79°81°83°1971: 79.6°F1972: 79.3°F1973: 79.1°F1974: 79.7°F1975: 79.5°F1976: 79.5°F1977: 80.3°F1978: 79.7°F1979: 78.8°F1980: 79.9°F1981: 79.5°F1982: 78.6°F1983: 80.1°F1984: 79.6°F1985: 80.4°F1986: 80.7°F1987: 81.7°F1988: 81.3°F1989: 81.0°F1990: 81.5°F1991: 81.4°F1992: 80.9°F1993: 81.6°F1994: 81.5°F1995: 81.2°F1996: 80.5°F1997: 79.9°F1998: 81.0°F2000: 81.0°F2001: 80.4°F2002: 81.5°F2003: 81.1°F2006: 79.4°F2007: 81.1°F2011: 80.3°F2012: 81.1°F2013: 81.3°F2014: 81.5°F2015: 81.0°F2016: 80.6°F2019: 81.3°F2020: 81.9°F2021: 81.0°F2022: 81.3°F2023: 81.6°F2024: 82.4°F2025: 80.7°Flong-term trend197119801990200020202025
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 fewer 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°January: +0.3°F+0.3JFebruary: +0.8°F+0.8FMarch: +0.9°F+0.9MApril: +0.8°F+0.8AMay: +0.8°F+0.8MJune: +0.6°F+0.6JJuly: +0.5°F+0.5JAugust: +0.9°F+0.9ASeptember: +0.5°F+0.5SOctober: +0.7°F+0.7ONovember: +0.5°F+0.5NDecember: +0.5°F+0.5D

March has warmed the most — about 0.9°F. The warming runs across the whole year, not just one season.

Methodology & sources

Temperature — 1991–2020 normals computed from 20 years of daily observations at Roosevelt Roads, a weather station, about 1 km from the city centre. The underlying daily records come from NOAA's global station network.

How we build these numbers →