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Sylhet has a monsoon-influenced humid subtropical climate.
Hot, wet summers and cool, dry winters — here's what that means in plain terms.
What this climate feels like
The four things a regular visitor actually wants to know:
Highs near 33°C in August. About 91 days a year above 32 °C.
Lows near 12°C in January.
About 3580 mm of rain a year. Wettest in June.
A roughly even mix of sun and cloud.
What "monsoon-influenced humid subtropical" 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. Sylhet's type — monsoon-influenced humid subtropical — sits in the broad family of mild, temperate climates. Despite the name, winters here still bring real cold; the "subtropical" name refers to summer heat and humidity.
Researchers write climate types as a short letter code. Here is what each letter means:
Cities with the same climate as Sylhet
A monsoon-influenced humid subtropical climate (Cwa) — these recognizable cities share it. If you know one of them, you know roughly what to expect.
Sylhet sits near a climate boundary
This city's climate sits within about 0.3 °C of the next type along. A slightly cooler or warmer decade could change which side of the boundary it lands on — but the lived weather doesn't change at the line.
Has Sylhet's climate type changed?
A climate type is a coarse bucket. It can hold steady for years while the weather inside it shifts — or tip into the next bucket.
What this climate means for you
Rice, citrus, tea, sugarcane — the monsoon supports double-cropping. Winter vegetables grow well in the dry, cool months.
The cool, dry winter (Nov–Mar) is the classic travel window. Summer is hot, humid and often disrupted by heavy rain.
Hot, sticky summers with monsoon rains; pleasantly cool, dry winters. Two starkly different halves of the year.
Where these numbers come from
The climate type and the month-by-month figures on this page are computed from Sylhet's measured 30-year climate normals (1991–2020) — the same official records behind Sylhet'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 — modelled for this location from ERA5-Land reanalysis, a ~9 km global grid, because no long-record weather station is close enough to use.
Precipitation — 1991–2020 normals computed from 7 years of daily observations at Osmany Intl, a weather station, about 7 km from the city centre. The underlying daily records come from NOAA's global station network.