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Buchanan has a tropical rainforest 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 31°C most of the year. About 20 days a year above 32 °C.
Even the coolest nights stay near 23°C.
About 2964 mm of rain a year. Wettest in September.
Cloudy skies much of the year.
What "tropical rainforest" 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. Buchanan's type — tropical rainforest — 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 Buchanan
A tropical rainforest climate (Af) — these recognizable cities share it. If you know one of them, you know roughly what to expect.
Buchanan sits near a climate boundary
This city sits right on the line between tropical rainforest 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 Buchanan's climate type changed?
Stable — Buchanan'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
Things grow year-round — there is no frost and no dormant season. The challenge is excess moisture: mould, rot and fast weed growth. Tropical fruit thrives; temperate vegetables struggle.
Warm whenever you go, but there is no completely dry time of year. Check a specific city's monthly rainfall to find its least-wet window before planning an outdoor trip.
Heat and humidity are the everyday experience — warm nights, frequent rain, and no seasonal cool-down. Air conditioning is near-universal; airflow, shade and mould control matter.
Where these numbers come from
The climate type and the month-by-month figures on this page are computed from Buchanan's measured 30-year climate normals (1991–2020) — the same official records behind Buchanan'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 — modelled for this location from ERA5-Land reanalysis, a ~9 km global grid, because no long-record weather station is close enough to use.