Sylhet weather in April

In April, Sylhet sees average daytime highs of 29°C and overnight lows near 21°C, with 560 mm of rain across 21.4 wet days and about 12.6 hours of daylight. It is the 7th-warmest and 5th-wettest month of the year here.

Day-to-day highs hold fairly steady near 29°C through the month. The sky is clear or mostly clear about 38% of the time in April, and the air most often feels oppressive.

Daylight stretches from about 12 h 12 min at the start of April to 12 h 54 min by month's end. Set against the rest of the year, April is Sylhet's 7th-clearest and 3rd-windiest month. For the whole year in context, see Sylhet's year-round climate.

Daytime high
29°
7th warmest
Overnight low
21°
6th coldest
Rainfall
560 mm
21.4 wet days
Daylight
12 h 36 min
5:35 AM – 6:10 PM
Cloud cover
52%
7th clearest
Wind
5 km/h
3rd windiest
Solar energy
4.91 kWh/m²
Travel score
4.0
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 April

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 29°C through the month.

A typical April day in Sylhet reaches about 29°C in the afternoon and slips back to 21°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 25°C and 32°C. Set against its neighbours, April runs about 1°C warmer than March and on par with May.

15°20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
12920
22920
32920
42920
52920
62920
72920
82920
92920
102921
112921
122921
132921
142921
152921
162921
172921
183021
193021
202921
212921
222921
233021
243021
253021
263022
273022
283022
293022
303022

How April really feels in Sylhet

Once humidity and wind are folded in, April averages 17 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
17
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

The story in April is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Sylhet weather by month

How April compares with the rest of the year at a glance. April is the 7th-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan24° / 11°101.810.69.0
Feb26° / 14°484.611.18.2
Mar29° / 18°18711.211.86.1
Apr29° / 21°56021.412.64.0
May30° / 23°75927.613.23.1
Jun30° / 25°95329.513.52.5
Jul31° / 25°94130.813.42.3
Aug31° / 26°73330.712.92.3
Sep31° / 25°52327.612.22.6
Oct30° / 23°21714.811.44.7
Nov28° / 17°282.310.87.8
Dec25° / 13°121.110.59.1

Cloud cover in April

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 38% of the time in April.

Beyond those clear spells, partly cloudy skies cover about 20% of April, with mostly cloudy or overcast conditions the remaining 42%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
16733
26634
36535
46535
56535
66436
76436
86436
96337
106337
116238
126238
136040
145941
155842
165743
175644
185545
195446
205446
215446
225248
235248
245149
255149
265149
275149
285050
295149
305149

Chance of precipitation in April

Any precipitation

Sylhet gets around 560 mm of rain over 21.4 wet days in April. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 71% and peaks near 80% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202530
Rain chance (%)
163
264
365
465
566
666
767
867
968
1068
1169
1269
1370
1471
1571
1671
1772
1872
1973
2073
2174
2275
2375
2476
2577
2677
2778
2878
2979
3080

Humidity in April

DryComfortableHumidMuggyOppressiveMiserable

Most of April feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, April lands in the oppressive band about 50% of days. Sticky, muggy-or-worse air turns up on roughly 95% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1131757221
2021558241
3021358261
4021257281
5021056302
602954332
702853352
801751383
901749403
1001647433
1101545453
1201444484
1301442504
1400341524
1500339544
1600238564
1700237574
1800237565
1900236575
2000135595
2100134605
2200133615
2300132616
2400131626
2500130636
2600129637
2700128647
2800126658
2900125659
30001246510

Wind in April

Winds average 5 km/h in April.

Across April, daily wind ranges from about 5 km/h on the calmest days to 5 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
15calm
25calm
35calm
45calm
55calm
65calm
75calm
85calm
95calm
105calm
115calm
125calm
135calm
145calm
155calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
235calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm

Sunrise & sunset in April

DaylightNight

Daylight runs from about 12 h 12 min at the start of April to 12 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 42 minutes over April. Sunrise moves from 5:51 AM to 5:23 AM, and sunset from 6:04 PM to 6:17 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.25:516:04
212.25:506:04
312.35:496:05
412.35:476:05
512.35:466:05
612.35:456:06
712.45:446:06
812.45:436:07
912.45:426:07
1012.45:416:08
1112.55:406:08
1212.55:396:08
1312.55:386:09
1412.55:376:09
1512.65:366:10
1612.65:356:10
1712.65:346:11
1812.65:336:11
1912.75:326:12
2012.75:316:12
2112.75:316:12
2212.75:306:13
2312.75:296:13
2412.85:286:14
2512.85:276:14
2612.85:266:15
2712.85:256:15
2812.95:256:16
2912.95:246:16
3012.95:236:17

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 4.91 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 — April's 4.91 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
15.0Bright
25.0Bright
35.0Bright
45.0Bright
55.0Bright
65.0Bright
75.0Bright
85.0Bright
95.0Bright
105.0Bright
115.0Bright
125.0Bright
135.0Bright
144.9Bright
154.9Bright
164.9Bright
174.9Bright
184.9Bright
194.8Bright
204.8Bright
214.8Bright
224.8Bright
234.8Bright
244.8Bright
254.7Bright
264.7Bright
274.7Bright
284.7Bright
294.6Bright
304.6Bright
Planning a trip in April

Hazard calendar for Sylhet

In seasonPeak

In April, Sylhet sits inside 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.

Monsoon
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is April a good time to visit Sylhet?

Our two travel scores rate April for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

4.0
Sightseeing
7th-best month of the year
5.2
Beach & pool
7th-best month of the year

April is a reasonable time to visit Sylhet for sightseeing.

What to pack for Sylhet in April

From April's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In April, Sylhet sees daytime highs around 29°C and nights near 21°C. Pack light clothes and rain gear. Worth having: sun protection. About 21 days see rain.

light clothesrain gearsun protection

UV index in Sylhet in April

LowModerateHighVery highExtreme

Clear-sky midday UV in April peaks 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.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateVery highVery highExtremeHighJul 21UV 12Jan 17UV 4
UV index (midday)Level
Jan4Moderate
Feb5Moderate
Mar8Very high
Apr7High
May8Very high
Jun6High
Jul12Extreme
Aug10Extreme
Sep11Extreme
Oct6High
Nov6High
Dec5Moderate

Air quality in Sylhet in April

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where April 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.

0306090120JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyPoorModeratePoorUnhealthyJan 2099 µg/m³Jul 1824 µg/m³
PM2.5 (µg/m³)Level
Jan100Unhealthy
Feb94Unhealthy
Mar95Unhealthy
Apr62Unhealthy
May44Poor
Jun32Moderate
Jul23Moderate
Aug30Moderate
Sep36Poor
Oct51Poor
Nov67Unhealthy
Dec83Unhealthy
Location & terrain

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.

MymensinghDhakaSamdrup JongkharRangpurChittagong

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.

3 km
55 m
16 km
82 m
80 km
1,953 m
treesgrasslandcroplandartificial surfaceswaterwetland
April weather nearby: Mymensingh 149 km · Dhaka 199 km · Samdrup Jongkhar 215 km · Tamu 258 km · Mongar 272 km · Trashigang 273 km · Rangpur 280 km · Chittagong 285 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
Muslim 91%Hindu 8%other 1%

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).