Sylhet in Fall
In fall (September, October and November), Sylhet sees average daytime highs around 30°C and overnight lows near 22°C, with 768 mm of rain over about 45 wet days across the season. It is the 2nd-warmest season and the 3rd-wettest season.
Over the season highs ease from about 31°C in early September to 27°C by late November. The sky is clear or mostly clear about 48% of the time across fall, and the air most often feels miserable.
Fall is Sylhet's 2nd-best season to visit on our travel score. For the whole year in context, see Sylhet's year-round climate.
- Avg daytime high
- 30°C
- 2nd-warmest season
- Avg overnight low
- 22°C
- Rainfall
- 768 mm
- 45 wet days
- Avg wind
- 4 km/h
- Travel score
- 5.0
- 2nd-best season
- Months
- Sep · Oct · Nov
Temperature in Sylhet in Fall
Over the season highs ease from about 31°C in early September to 27°C by late November.
A typical fall day in Sylhet reaches about 30°C and drops to 22°C overnight. The warmest of the three months is September, the coolest November.
How fall really feels in Sylhet
Once humidity and wind are folded in, fall brings about 56 days that feel above 32°C and 0 that feel at or below 0°C.
The story in fall is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
Sylhet weather by month
How the three fall months (September, October and November) 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 Fall
The sky is clear or mostly clear about 48% of the time across fall.
Chance of precipitation in Fall
Sylhet gets around 768 mm of rain over 45 wet days across fall. The line is the day-by-day chance of measurable precipitation.
Humidity in Fall
Most of fall feels miserable — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Fall
Winds average 4 km/h across fall.
Sunrise & sunset in Fall
Daylight runs from about 12 h 30 min in early September to 10 h 36 min by late November. The lit band spans sunrise to sunset each day.
Solar energy in Fall
Average shortwave solar energy reaching the ground each day across fall, about 4.0 kWh/m².
Hazard calendar for Sylhet
In fall, Sylhet overlaps its monsoon season. The full year is below, with each hazard's peak months called out.
Sylhet's monsoon runs April–September, when most of the year's rain falls.
Is fall a good time to visit Sylhet?
Our two travel scores rate fall for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
fall is a reasonable time to visit Sylhet for sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Sylhet in Fall
From fall's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In fall, Sylhet sees daytime highs around 30°C and nights near 22°C. Pack light clothes and rain gear. About 45 days see rain.
UV index in Sylhet in Fall
Clear-sky midday UV across fall averages around 7 — 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 Fall
Average fine-particle pollution (PM2.5) through the year — so you can see where fall 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.