Sylhet in Winter
In winter (December, January and February), Sylhet sees average daytime highs around 25°C and overnight lows near 13°C, with 70 mm of rain over about 8 wet days across the season. It is the coldest season of the year and the driest season of the year.
Across winter, daytime highs hold fairly steady around 25°C. The sky is clear or mostly clear about 80% of the time across winter, and the air most often feels comfortable.
Winter is Sylhet's best season of the year to visit on our travel score. For the whole year in context, see Sylhet's year-round climate.
- Avg daytime high
- 25°C
- coldest season of the year
- Avg overnight low
- 13°C
- Rainfall
- 70 mm
- 8 wet days
- Avg wind
- 3 km/h
- Travel score
- 8.8
- best season of the year
- Months
- Dec · Jan · Feb
Temperature in Sylhet in Winter
Across winter, daytime highs hold fairly steady around 25°C.
A typical winter day in Sylhet reaches about 25°C and drops to 13°C overnight. The warmest of the three months is February, the coolest January.
How winter really feels in Sylhet
Once humidity and wind are folded in, winter brings about 0 days that feel above 32°C and 0 that feel at or below 0°C.
winter sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Sylhet weather by month
How the three winter months (December, January and February) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 24° / 11° | 10 | 1.8 | 10.6 | 9.0 |
| Feb | 26° / 14° | 48 | 4.6 | 11.1 | 8.2 |
| Mar | 29° / 18° | 187 | 11.2 | 11.8 | 6.1 |
| Apr | 29° / 21° | 560 | 21.4 | 12.6 | 4.0 |
| May | 30° / 23° | 759 | 27.6 | 13.2 | 3.1 |
| Jun | 30° / 25° | 953 | 29.5 | 13.5 | 2.5 |
| Jul | 31° / 25° | 941 | 30.8 | 13.4 | 2.3 |
| Aug | 31° / 26° | 733 | 30.7 | 12.9 | 2.3 |
| Sep | 31° / 25° | 523 | 27.6 | 12.2 | 2.6 |
| Oct | 30° / 23° | 217 | 14.8 | 11.4 | 4.7 |
| Nov | 28° / 17° | 28 | 2.3 | 10.8 | 7.8 |
| Dec | 25° / 13° | 12 | 1.1 | 10.5 | 9.1 |
Cloud cover in Winter
The sky is clear or mostly clear about 80% of the time across winter.
Chance of precipitation in Winter
Sylhet gets around 70 mm of rain over 8 wet days across winter. The line is the day-by-day chance of measurable precipitation.
Humidity in Winter
Most of winter feels comfortable — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Winter
Winds average 3 km/h across winter.
Sunrise & sunset in Winter
Daylight runs from about 10 h 36 min in early December to 11 h 24 min by late February. The lit band spans sunrise to sunset each day.
Solar energy in Winter
Average shortwave solar energy reaching the ground each day across winter, about 4.3 kWh/m².
Hazard calendar for Sylhet
None of Sylhet's seasonal hazards peak in winter. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do.
Sylhet's monsoon runs April–September, when most of the year's rain falls.
Is winter a good time to visit Sylhet?
Our two travel scores rate winter for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
winter is one of the better times to visit Sylhet for general sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Sylhet in Winter
From winter's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In winter, Sylhet sees daytime highs around 25°C and nights near 13°C. Worth packing: light clothes and sun protection. About 8 days see rain.
UV index in Sylhet in Winter
Clear-sky midday UV across winter averages around 5 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Sylhet peaks around July 21 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near January 17 at about 4 (moderate).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 4 | 5 | 8 | 7 | 8 | 6 | 12 | 10 | 11 | 6 | 6 | 5 |
| Level | Moderate | Moderate | Very high | High | Very high | High | Extreme | Extreme | Extreme | High | High | Moderate |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 4 | Moderate |
| Feb | 5 | Moderate |
| Mar | 8 | Very high |
| Apr | 7 | High |
| May | 8 | Very high |
| Jun | 6 | High |
| Jul | 12 | Extreme |
| Aug | 10 | Extreme |
| Sep | 11 | Extreme |
| Oct | 6 | High |
| Nov | 6 | High |
| Dec | 5 | Moderate |
Air quality in Sylhet in Winter
Average fine-particle pollution (PM2.5) through the year — so you can see where winter falls, not just the annual average.
Air quality in Sylhet is worst in January — around 100 µg/m³ PM2.5 (unhealthy), about 4.3× the cleanest month (July, 23 µg/m³).
Seasonal pattern from CAMS reanalysis, scaled to Sylhet's WHO annual average of 59.8 µg/m³.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 100 | 94 | 95 | 62 | 44 | 32 | 23 | 30 | 36 | 51 | 67 | 83 |
| Level | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Poor | Moderate | Moderate | Moderate | Poor | Poor | Unhealthy | Unhealthy |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 100 | Unhealthy |
| Feb | 94 | Unhealthy |
| Mar | 95 | Unhealthy |
| Apr | 62 | Unhealthy |
| May | 44 | Poor |
| Jun | 32 | Moderate |
| Jul | 23 | Moderate |
| Aug | 30 | Moderate |
| Sep | 36 | Poor |
| Oct | 51 | Poor |
| Nov | 67 | Unhealthy |
| Dec | 83 | Unhealthy |
Where is Sylhet?
Sylhet sits at 24.9°N, 91.9°E, 26 m above sea level, in Bangladesh. The nearest listed city is Mymensingh, 149 km away.
Topography around Sylhet
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Sylhet.
Within 3 km, the terrain around Sylhet has only modest variations in elevation — a maximum elevation change of 55 m around an average of 19 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 82 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,953 m.
The land around Sylhet is covered by trees (52%) and artificial surfaces (41%) within 3 km, cropland (53%) and trees (39%) within 16 km, and trees (46%) and cropland (40%) within 80 km.
Bangladesh travel facts
- Travel advisory
- Level 3
- Reconsider Travel
- Power plugs
- Type A / C / D / G
- 220 V · 50 Hz
- Prices
- ≈ 25% of US
- price level, 2025
- GDP per capita
- $2,597
- 2025
- Happiness
- 4.3 / 10
- World Happiness, 2025
- Safe drinking water
- 59%
- of population, 2024
- Homicide rate
- 2.3
- per 100k, 2018
- Road deaths
- 15.3
- per 100k/yr, 2019
- Income group
- Lower middle
- World Bank
- English
- Moderate
- EF EPI 506
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Sylhet (24.899°, 91.872°, elevation 26 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google.