Sylhet weather in May
May in Sylhet: sweltering, soaked, with poor air quality — not the time — 26 rainy days.
Updated September 2026 · climate normals from ERA5 reanalysis
#8 of 12 months in Sylhet · #1320 of 1413 destinations to visit in May · comfort 46/100 (tier F)
- Days
- 30°C
- Nights
- 23°C
- Wet days
- 26
- Sun
- 8.3 h
- Humidity
- 84%
- Daylight
- 13 h

Traveller notes on Sylhet in May
Other months in Sylhet
Forum posters describe July as squarely within Bangladesh's monsoon, with constant rain throughout the month and heat that makes getting around genuinely uncomfortable between downpours. Posters are direct that despite this, June through September counts as high season for some of Sylhet's signature natural attractions specifically because of the rain - Bisnakandi is recommended for exactly July and August, and the Ratargul Swamp Forest, one of the few swamp forests in Asia, is best visited by boat during the May-to-October monsoon precisely because the rising water lets you glide directly among the trees. Posters generally frame the constant rain as the trade-off for seeing these flooded-forest and waterfall attractions at their most dramatic. Posters generally rate July as heavily monsoon-affected and physically demanding for general travel in Sylhet, but genuinely rewarding for visitors specifically prioritizing its wetland and waterfall attractions at their peak.
Forum posters place late October through early March as Bangladesh's best general travel window, putting January squarely inside it. For the Sylhet tea gardens specifically, posters note there's a lean period from the third week of December through the second week of March when no tea is harvested - this is pruning season, so January visitors see far less picking activity and less vivid green than during the main harvest months, though the gardens, tea-worker villages and nearby tribal villages remain open and worth visiting regardless.
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Sylhet climate normals — May
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Sylhet in May
How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.
Shoulder seasonschool holidays in 2 of the markets that fill it, an ordinary month(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Sylhet's weather
Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).
Fair weatherSylhet's weather peaks December–February, best around January.
Best weatherFair weatherToughest weather
What's on in Sylhet in May
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Hazard
Flash-flood season
15 May – 30 Sep · usuallyClosuresThe Surma and Kushiyara rivers regularly burst their banks between May and September: the 2022 flood submerged most of Sylhet and neighbouring Sunamganj district, shut the airport and railway station, and displaced close to half a million people. Smaller flash floods recur most years. Source ↗
- Season
Wet season
MonsoonRisk26 rainy days and about 566 mm in the month — the real kind of rainy season, not afternoon showers.
from the climate normals
Where is Sylhet?
Sylhet in May — FAQ
- Is May a good time to visit Sylhet?
- May in Sylhet: sweltering, soaked, with poor air quality — not the time — 26 rainy days. It ranks #8 of 12 months for Sylhet on SeasonMap's comfort score (46/100).
- What is the weather like in Sylhet in May?
- In May, Sylhet averages a daily high of 30.4°C and a low of 23.3°C, with about 566 mm of rain over roughly 25.7 rainy days.
- What is the air quality in Sylhet in May?
- Sylhet has a mean US Air Quality Index of about 110 in May.