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Tlapacoyan has a tropical monsoon climate.
Hot all year, with humid air and reliable rain — no real cool season.
What this climate feels like
The four things a regular visitor actually wants to know:
Daytime highs near 96°F most of the year.
Even the coolest nights stay near 58°F.
About 56 in of rain a year. Wettest in September.
Cloudy skies much of the year.
What "tropical monsoon" means
Climate scientists sort every place on Earth into about 30 climate types, based on how hot, cold, wet and dry it is across the year. Tlapacoyan's type — tropical monsoon — sits in the broad family of hot, humid climates near the equator.
Researchers write climate types as a short letter code. Here is what each letter means:
Cities with the same climate as Tlapacoyan
A tropical monsoon climate (Am) — these recognizable cities share it. If you know one of them, you know roughly what to expect.
Tlapacoyan sits near a climate boundary
This city sits right on the line between tropical monsoon and the next type along. Different climate maps file it on different sides of that line; the lived weather doesn't change at the line — it's a naming boundary, not a wall.
Has Tlapacoyan's climate type changed?
Stable — Tlapacoyan's climate has held the same type between the 1971–2000 and 1991–2020 normals. The label is steady; the climate beneath it is still warming.
What this climate means for you
Tropical fruit and rice thrive on the monsoon rhythm. Time outdoor planting and harvest around the dry months; the wet season brings flooding and rot risk.
The dry months are the comfortable window for outdoor travel — the wet months bring heavy rain in concentrated bursts, not continuous drizzle.
Hot and humid year-round, with a dramatic shift to heavy rain in the wet months. Building drainage and storm-readiness matter as much as cooling.
Where these numbers come from
The climate type and the month-by-month figures on this page are computed from Tlapacoyan's measured 30-year climate normals (1991–2020) — the same official records behind Tlapacoyan's main climate page, so the two always agree.
Long-range climate maps measure things slightly differently and can place a city in a neighbouring category. Where they differ, this page uses the measured station record as the climate today.
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from CONAGUA / SMN, Mexico's national weather service, measured at San Jose Acateno, about 20 km from the city centre.