Sylhet weather in October
In October, Sylhet sees average daytime highs of 30°C and overnight lows near 23°C, with 217 mm of rain across 14.8 wet days and about 11.4 hours of daylight. It is the 5th-warmest and 7th-wettest month of the year here.
Day-to-day highs hold fairly steady near 30°C through the month. The sky is clear or mostly clear about 54% of the time in October, and the air most often feels oppressive.
Daylight stretches from about 11 h 48 min at the start of October to 11 h 06 min by month's end. Set against the rest of the year, October is Sylhet's 6th-clearest and 9th-windiest month. For the whole year in context, see Sylhet's year-round climate.
- Daytime high
- 30°
- 5th warmest
- Overnight low
- 23°
- 7th coldest
- Rainfall
- 217 mm
- 14.8 wet days
- Daylight
- 11 h 24 min
- 5:55 AM – 5:20 PM
- Cloud cover
- 42%
- 6th clearest
- Wind
- 4 km/h
- 9th windiest
- Solar energy
- 4.09 kWh/m²
- Travel score
- 4.7
- out of 10
Sylhet is capital and largest city of Sylhet Division, Bangladesh.
- Air quality
- Severe
- PM2.5 59.8 µg/m³ · 2018
- Density
- 8,943/km²
- people per km²
- Founded
- 1867
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in October
Day-to-day highs hold fairly steady near 30°C through the month.
A typical October day in Sylhet reaches about 30°C in the afternoon and slips back to 23°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 32°C. Set against its neighbours, October runs on par with September and about 2°C warmer than November.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 31 | 31 | 31 | 31 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 29 | 29 | 29 | 29 |
| Avg low (°C) | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 22 | 22 | 22 | 22 | 22 | 21 | 21 | 21 | 21 | 21 | 21 | 20 | 20 | 20 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 31 | 24 |
| 2 | 31 | 24 |
| 3 | 31 | 24 |
| 4 | 31 | 24 |
| 5 | 30 | 24 |
| 6 | 30 | 24 |
| 7 | 30 | 24 |
| 8 | 30 | 24 |
| 9 | 30 | 24 |
| 10 | 30 | 24 |
| 11 | 30 | 23 |
| 12 | 30 | 23 |
| 13 | 30 | 23 |
| 14 | 30 | 23 |
| 15 | 30 | 23 |
| 16 | 30 | 23 |
| 17 | 30 | 23 |
| 18 | 30 | 22 |
| 19 | 30 | 22 |
| 20 | 30 | 22 |
| 21 | 30 | 22 |
| 22 | 30 | 22 |
| 23 | 30 | 21 |
| 24 | 30 | 21 |
| 25 | 30 | 21 |
| 26 | 30 | 21 |
| 27 | 30 | 21 |
| 28 | 29 | 21 |
| 29 | 29 | 20 |
| 30 | 29 | 20 |
| 31 | 29 | 20 |
How October really feels in Sylhet
Once humidity and wind are folded in, October averages 26 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.
The story in October is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
Sylhet weather by month
How October compares with the rest of the year at a glance. October is the 5th-warmest and 7th-wettest month here — the current month is highlighted below.
| 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 October
The sky is clear or mostly clear about 54% of the time in October.
Beyond those clear spells, partly cloudy skies cover about 13% of October, with mostly cloudy or overcast conditions the remaining 32%. Skies tend to open up as the month goes on.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 43 | 46 | 47 | 50 | 52 | 54 | 56 | 57 | 59 | 61 | 63 | 64 | 66 | 67 | 69 | 70 | 72 | 73 | 75 | 76 | 76 | 77 | 78 | 79 | 80 | 80 | 80 | 81 | 81 | 81 | 82 |
| Cloudier (%) | 57 | 54 | 53 | 50 | 48 | 46 | 44 | 43 | 41 | 39 | 37 | 36 | 34 | 33 | 31 | 30 | 28 | 27 | 25 | 24 | 24 | 23 | 22 | 21 | 20 | 20 | 20 | 19 | 19 | 19 | 18 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 43 | 57 |
| 2 | 46 | 54 |
| 3 | 47 | 53 |
| 4 | 50 | 50 |
| 5 | 52 | 48 |
| 6 | 54 | 46 |
| 7 | 56 | 44 |
| 8 | 57 | 43 |
| 9 | 59 | 41 |
| 10 | 61 | 39 |
| 11 | 63 | 37 |
| 12 | 64 | 36 |
| 13 | 66 | 34 |
| 14 | 67 | 33 |
| 15 | 69 | 31 |
| 16 | 70 | 30 |
| 17 | 72 | 28 |
| 18 | 73 | 27 |
| 19 | 75 | 25 |
| 20 | 76 | 24 |
| 21 | 76 | 24 |
| 22 | 77 | 23 |
| 23 | 78 | 22 |
| 24 | 79 | 21 |
| 25 | 80 | 20 |
| 26 | 80 | 20 |
| 27 | 80 | 20 |
| 28 | 81 | 19 |
| 29 | 81 | 19 |
| 30 | 81 | 19 |
| 31 | 82 | 18 |
Chance of precipitation in October
Sylhet gets around 217 mm of rain over 14.8 wet days in October. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 48% and peaks near 80% on the wettest days. The odds ease toward the end of the month.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 80 | 79 | 77 | 75 | 73 | 71 | 69 | 67 | 64 | 62 | 59 | 57 | 54 | 52 | 49 | 46 | 44 | 41 | 39 | 37 | 35 | 33 | 31 | 29 | 28 | 26 | 25 | 23 | 22 | 21 | 20 |
| Rain chance (%) | |
|---|---|
| 1 | 80 |
| 2 | 79 |
| 3 | 77 |
| 4 | 75 |
| 5 | 73 |
| 6 | 71 |
| 7 | 69 |
| 8 | 67 |
| 9 | 64 |
| 10 | 62 |
| 11 | 59 |
| 12 | 57 |
| 13 | 54 |
| 14 | 52 |
| 15 | 49 |
| 16 | 46 |
| 17 | 44 |
| 18 | 41 |
| 19 | 39 |
| 20 | 37 |
| 21 | 35 |
| 22 | 33 |
| 23 | 31 |
| 24 | 29 |
| 25 | 28 |
| 26 | 26 |
| 27 | 25 |
| 28 | 23 |
| 29 | 22 |
| 30 | 21 |
| 31 | 20 |
Humidity in October
Most of October feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, October lands in the oppressive band about 47% of days. Sticky, muggy-or-worse air turns up on roughly 97% of them.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Comfortable (%) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
| Humid (%) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 2 | 2 | 3 | 3 | 4 | 5 | 6 | 6 | 8 | 9 | 10 | 12 |
| Muggy (%) | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 2 | 2 | 3 | 4 | 5 | 7 | 9 | 11 | 13 | 16 | 19 | 22 | 25 | 28 | 32 | 35 | 38 | 42 | 45 | 48 | 50 | 52 | 55 | 55 |
| Oppressive (%) | 30 | 32 | 35 | 37 | 40 | 42 | 45 | 47 | 49 | 51 | 53 | 56 | 57 | 58 | 59 | 60 | 59 | 58 | 58 | 56 | 56 | 53 | 52 | 49 | 47 | 44 | 42 | 39 | 36 | 33 | 30 |
| Miserable (%) | 70 | 68 | 64 | 62 | 59 | 57 | 54 | 51 | 48 | 46 | 43 | 39 | 36 | 33 | 30 | 27 | 24 | 22 | 19 | 17 | 14 | 12 | 10 | 8 | 7 | 5 | 4 | 3 | 3 | 2 | 2 |
| Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | Miserable (%) | |
|---|---|---|---|---|---|
| 1 | 0 | 0 | 0 | 30 | 70 |
| 2 | 0 | 0 | 0 | 32 | 68 |
| 3 | 0 | 0 | 1 | 35 | 64 |
| 4 | 0 | 0 | 1 | 37 | 62 |
| 5 | 0 | 0 | 1 | 40 | 59 |
| 6 | 0 | 0 | 1 | 42 | 57 |
| 7 | 0 | 0 | 1 | 45 | 54 |
| 8 | 0 | 0 | 2 | 47 | 51 |
| 9 | 0 | 0 | 2 | 49 | 48 |
| 10 | 0 | 0 | 3 | 51 | 46 |
| 11 | 0 | 0 | 4 | 53 | 43 |
| 12 | 0 | 0 | 5 | 56 | 39 |
| 13 | 0 | 0 | 7 | 57 | 36 |
| 14 | 0 | 0 | 9 | 58 | 33 |
| 15 | 0 | 0 | 11 | 59 | 30 |
| 16 | 0 | 0 | 13 | 60 | 27 |
| 17 | 0 | 1 | 16 | 59 | 24 |
| 18 | 0 | 1 | 19 | 58 | 22 |
| 19 | 0 | 1 | 22 | 58 | 19 |
| 20 | 0 | 2 | 25 | 56 | 17 |
| 21 | 0 | 2 | 28 | 56 | 14 |
| 22 | 0 | 3 | 32 | 53 | 12 |
| 23 | 0 | 3 | 35 | 52 | 10 |
| 24 | 0 | 4 | 38 | 49 | 8 |
| 25 | 0 | 5 | 42 | 47 | 7 |
| 26 | 0 | 6 | 45 | 44 | 5 |
| 27 | 0 | 6 | 48 | 42 | 4 |
| 28 | 0 | 8 | 50 | 39 | 3 |
| 29 | 0 | 9 | 52 | 36 | 3 |
| 30 | 0 | 10 | 55 | 33 | 2 |
| 31 | 1 | 12 | 55 | 30 | 2 |
Wind in October
Winds average 4 km/h in October.
Across October, daily wind ranges from about 4 km/h on the calmest days to 4 km/h at its breeziest. It stays fairly steady from day to day.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 |
| Feels | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 4 | calm |
| 2 | 4 | calm |
| 3 | 4 | calm |
| 4 | 4 | calm |
| 5 | 4 | calm |
| 6 | 4 | calm |
| 7 | 4 | calm |
| 8 | 4 | calm |
| 9 | 4 | calm |
| 10 | 4 | calm |
| 11 | 4 | calm |
| 12 | 4 | calm |
| 13 | 4 | calm |
| 14 | 4 | calm |
| 15 | 4 | calm |
| 16 | 4 | calm |
| 17 | 4 | calm |
| 18 | 4 | calm |
| 19 | 4 | calm |
| 20 | 4 | calm |
| 21 | 4 | calm |
| 22 | 4 | calm |
| 23 | 4 | calm |
| 24 | 4 | calm |
| 25 | 4 | calm |
| 26 | 4 | calm |
| 27 | 4 | calm |
| 28 | 4 | calm |
| 29 | 4 | calm |
| 30 | 4 | calm |
| 31 | 4 | calm |
Sunrise & sunset in October
Daylight runs from about 11 h 48 min at the start of October to 11 h 06 min by month's end. The lit band spans sunrise to sunset each day.
Days shrink by about 42 minutes over October. Sunrise moves from 5:48 AM to 6:04 AM, and sunset from 5:35 PM to 5:08 PM.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 11.8 | 11.7 | 11.7 | 11.7 | 11.7 | 11.6 | 11.6 | 11.6 | 11.6 | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 | 11.4 | 11.4 | 11.4 | 11.4 | 11.3 | 11.3 | 11.3 | 11.3 | 11.2 | 11.2 | 11.2 | 11.2 | 11.2 | 11.1 | 11.1 | 11.1 | 11.1 |
| Sunrise (AM) | 5:48 | 5:49 | 5:49 | 5:50 | 5:50 | 5:51 | 5:51 | 5:51 | 5:52 | 5:52 | 5:53 | 5:53 | 5:54 | 5:54 | 5:55 | 5:55 | 5:56 | 5:56 | 5:57 | 5:57 | 5:58 | 5:59 | 5:59 | 6:00 | 6:00 | 6:01 | 6:02 | 6:02 | 6:03 | 6:03 | 6:04 |
| Sunset (PM) | 5:35 | 5:34 | 5:32 | 5:31 | 5:30 | 5:29 | 5:28 | 5:27 | 5:26 | 5:25 | 5:24 | 5:23 | 5:22 | 5:22 | 5:21 | 5:20 | 5:19 | 5:18 | 5:17 | 5:16 | 5:15 | 5:15 | 5:14 | 5:13 | 5:12 | 5:12 | 5:11 | 5:10 | 5:09 | 5:09 | 5:08 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 11.8 | 5:48 | 5:35 |
| 2 | 11.7 | 5:49 | 5:34 |
| 3 | 11.7 | 5:49 | 5:32 |
| 4 | 11.7 | 5:50 | 5:31 |
| 5 | 11.7 | 5:50 | 5:30 |
| 6 | 11.6 | 5:51 | 5:29 |
| 7 | 11.6 | 5:51 | 5:28 |
| 8 | 11.6 | 5:51 | 5:27 |
| 9 | 11.6 | 5:52 | 5:26 |
| 10 | 11.5 | 5:52 | 5:25 |
| 11 | 11.5 | 5:53 | 5:24 |
| 12 | 11.5 | 5:53 | 5:23 |
| 13 | 11.5 | 5:54 | 5:22 |
| 14 | 11.5 | 5:54 | 5:22 |
| 15 | 11.4 | 5:55 | 5:21 |
| 16 | 11.4 | 5:55 | 5:20 |
| 17 | 11.4 | 5:56 | 5:19 |
| 18 | 11.4 | 5:56 | 5:18 |
| 19 | 11.3 | 5:57 | 5:17 |
| 20 | 11.3 | 5:57 | 5:16 |
| 21 | 11.3 | 5:58 | 5:15 |
| 22 | 11.3 | 5:59 | 5:15 |
| 23 | 11.2 | 5:59 | 5:14 |
| 24 | 11.2 | 6:00 | 5:13 |
| 25 | 11.2 | 6:00 | 5:12 |
| 26 | 11.2 | 6:01 | 5:12 |
| 27 | 11.2 | 6:02 | 5:11 |
| 28 | 11.1 | 6:02 | 5:10 |
| 29 | 11.1 | 6:03 | 5:09 |
| 30 | 11.1 | 6:03 | 5:09 |
| 31 | 11.1 | 6:04 | 5:08 |
Solar energy in October
Average shortwave solar energy reaching the ground each day in October, about 4.09 kWh/m².
For context, solar energy here swings from a low near 3.23 kWh/m² to a high of 5.31 kWh/m² in March across the year — October's 4.09 kWh/m² falls in the middle.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 3.8 | 3.8 | 3.8 | 3.9 | 3.9 | 3.9 | 3.9 | 3.9 | 4.0 | 4.0 | 4.0 | 4.0 | 4.1 | 4.1 | 4.1 | 4.1 | 4.1 | 4.2 | 4.2 | 4.2 | 4.2 | 4.2 | 4.2 | 4.2 | 4.2 | 4.2 | 4.2 | 4.2 | 4.3 | 4.3 | 4.3 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 3.8 | Moderate |
| 2 | 3.8 | Moderate |
| 3 | 3.8 | Moderate |
| 4 | 3.9 | Moderate |
| 5 | 3.9 | Moderate |
| 6 | 3.9 | Moderate |
| 7 | 3.9 | Moderate |
| 8 | 3.9 | Moderate |
| 9 | 4.0 | Moderate |
| 10 | 4.0 | Moderate |
| 11 | 4.0 | Bright |
| 12 | 4.0 | Bright |
| 13 | 4.1 | Bright |
| 14 | 4.1 | Bright |
| 15 | 4.1 | Bright |
| 16 | 4.1 | Bright |
| 17 | 4.1 | Bright |
| 18 | 4.2 | Bright |
| 19 | 4.2 | Bright |
| 20 | 4.2 | Bright |
| 21 | 4.2 | Bright |
| 22 | 4.2 | Bright |
| 23 | 4.2 | Bright |
| 24 | 4.2 | Bright |
| 25 | 4.2 | Bright |
| 26 | 4.2 | Bright |
| 27 | 4.2 | Bright |
| 28 | 4.2 | Bright |
| 29 | 4.3 | Bright |
| 30 | 4.3 | Bright |
| 31 | 4.3 | Bright |
Hazard calendar for Sylhet
None of Sylhet's seasonal hazards are active in October. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.
Sylhet's monsoon runs April–September, when most of the year's rain falls.
Is October a good time to visit Sylhet?
Our two travel scores rate October for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
October 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 October
From October's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In October, Sylhet sees daytime highs around 30°C and nights near 23°C. Pack light clothes and rain gear. About 15 days see rain.
UV index in Sylhet in October
Clear-sky midday UV in October peaks around 6 — 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 October
Average fine-particle pollution (PM2.5) through the year — so you can see where October 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. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).