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

Sylhet🇧🇩 Bangladesh · Bangladesh & Bengal · City46
  1. 93Jan
  2. 87Feb
  3. 72Mar
  4. 51Apr
  5. 46May
  6. 34Jun
  7. 36Jul
  8. 39Aug
  9. 41Sep
  10. 57Oct
  11. 80Nov
  12. 90Dec

#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
Sylhet, Bangladesh
Photo: Tanha Tamanna Syed · Pexels

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.
Tripadvisor community · July · 1 month ago · Read more on Tripadvisor ↗
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.
Tripadvisor community · January · 1 month ago · Read more on Tripadvisor ↗

Add your own note from Sylhet's card on the map.

Sylhet climate normals — May

Daytime high30°C / 87°F🔥 sweltering
Nighttime low23°C / 74°F
Feels like (high)37°C / 99°F
Rainfall566 mm / 22.3 in⛈ soaked
Rainy days26 days
Humidity84%💦 very humid
Dew point23°C / 74°F
Sunshine8.3 h/day
Daylight13.4 h
Wind8 km/h / 5 mph
Air quality (US AQI)110😷 poor

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)

JFMAMJJASOND

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.

JFMAMJJASOND

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 · usuallyClosures

    The 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

    MonsoonRisk

    26 rainy days and about 566 mm in the month — the real kind of rainy season, not afternoon showers.

    from the climate normals

What's on around the world in May →

Where is Sylhet?

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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.