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Has the climate in Chachoengsao changed?

Chachoengsao has warmed about 3.1°F since 1971.

About 0.6°F per decade, measured from Chachoengsao'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? Chachoengsao's climate has warmed faster than most other cities in Thailand.

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
+2.0°F
1970s
82.4°F
Recent
84.4°F
A steady upward drift
Hot days above 90°F
about the same
1970s
264 / yr
Recent
264 / yr
About the same number of heat days
Rainy days
17 more days
1970s
121 / yr
Recent
138 / yr
Wetter on average

Chachoengsao's temperature, year by year

Average temperature for each year from 1971 to 2025.

80°82°84°86°1971: 81.8°F1972: 83.0°F1973: 82.1°F1974: 81.3°F1975: 81.5°F1976: 81.7°F1977: 82.8°F1978: 82.9°F1979: 83.3°F1980: 83.5°F1981: 82.1°F1982: 82.1°F1983: 82.6°F1984: 82.5°F1985: 82.5°F1986: 82.1°F1987: 83.0°F1988: 82.5°F1989: 82.8°F1990: 83.2°F1991: 83.6°F1992: 82.9°F1993: 82.6°F1994: 82.9°F1995: 83.3°F1996: 83.5°F1997: 84.9°F1998: 85.3°F1999: 83.3°F2000: 83.8°F2001: 84.2°F2002: 84.6°F2003: 84.6°F2004: 84.8°F2005: 84.4°F2006: 84.8°F2007: 84.5°F2008: 83.4°F2009: 83.9°F2010: 84.8°F2011: 83.1°F2012: 84.5°F2013: 83.9°F2014: 84.3°F2015: 84.6°F2016: 84.9°F2017: 84.2°F2018: 83.9°F2019: 85.1°F2020: 84.9°F2021: 84.1°F2022: 84.1°F2023: 85.4°F2024: 85.3°F2025: 84.4°Flong-term trend1971198019902000201020202025
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 13 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°January: +1.8°F+1.8JFebruary: +1.8°F+1.8FMarch: +1.4°F+1.4MApril: +1.3°F+1.3AMay: +1.2°F+1.2MJune: +0.9°F+0.9JJuly: +0.9°F+0.9JAugust: +1.1°F+1.1ASeptember: +0.9°F+0.9SOctober: +1.2°F+1.2ONovember: +2.3°F+2.3NDecember: +2.2°F+2.2D

November has warmed the most — about 2.3°F. The warming runs across the whole year, not just one season.

Methodology & sources

Temperature — 1991–2020 normals computed from 28 years of daily observations at Bangkok Metropolis, a weather station, about 55 km from the city centre. The underlying daily records come from NOAA's global station network.

How we build these numbers →