Climate Insights for Osmani International Airport

Sylhet, Sylhet Division, Bangladesh

Hottest
September
32°C peak
Coldest
January
12°C low
Wettest
June
876mm rain
Best to Visit
January, February, November
Mild temps & low rain

Climate Overview

The climate in Osmani International Airport is warm and mild. The average annual temperature is 24°C and approximately 4186mm of precipitation falls per year. June is the wettest month, receiving around 876mm of rainfall. Osmani International Airport is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: September, August, July. The coldest months are January, December, February, when temperatures can drop to 12°C.

Temperature

10° 20° 30° 40° Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Max: 24° Average: 17° Min: 12° Feb Max: 26° Average: 20° Min: 14° Mar Max: 29° Average: 23° Min: 18° Apr Max: 30° Average: 25° Min: 21° May Max: 31° Average: 27° Min: 23° Jun Max: 31° Average: 28° Min: 25° Jul Max: 31° Average: 28° Min: 26° Aug Max: 32° Average: 28° Min: 26° Sep Max: 32° Average: 28° Min: 26° Oct Max: 31° Average: 27° Min: 23° Nov Max: 29° Average: 23° Min: 18° Dec Max: 25° Average: 19° Min: 14°
Max
Average
Min

Osmani International Airport sees moderate temperature variation throughout the year, ranging from 12°C to 32°C. The warmest month is September, when average highs reach 32°C and the mean temperature sits around 28°C. January is the coolest month, with minimum temperatures around 12°C and an average of 17°C. On average, daily temperatures fluctuate by about 9°C between overnight lows and afternoon highs. The sharpest temperature change occurs between November and December, with a 4°C shift in average temperatures.

Precipitation

0mm 50mm 100mm 150mm 200mm 250mm 300mm 350mm 400mm 450mm 500mm 550mm 600mm 650mm 700mm 750mm 800mm 850mm 900mm Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Precipitation: 11mm Feb Precipitation: 37mm Mar Precipitation: 141mm Apr Precipitation: 494mm May Precipitation: 538mm Jun Precipitation: 876mm Jul Precipitation: 753mm Aug Precipitation: 658mm Sep Precipitation: 404mm Oct Precipitation: 221mm Nov Precipitation: 26mm Dec Precipitation: 27mm
Precipitation

Osmani International Airport is a very wet location, receiving approximately 4186mm of precipitation annually, which averages out to around 349mm per month. The wettest month is June, averaging 876mm of rainfall. July and August also tend to see above-average precipitation. The driest month is January, with just 11mm. That's 865mm less than June, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic.

Wind

0km/h 5km/h 10km/h Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Wind Speed: 7km/h Feb Wind Speed: 7km/h Mar Wind Speed: 9km/h Apr Wind Speed: 8km/h May Wind Speed: 8km/h Jun Wind Speed: 8km/h Jul Wind Speed: 8km/h Aug Wind Speed: 7km/h Sep Wind Speed: 7km/h Oct Wind Speed: 6km/h Nov Wind Speed: 7km/h Dec Wind Speed: 7km/h
Wind Speed

Osmani International Airport is relatively calm, with an average annual wind speed of 7km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is March, averaging 9km/h, though still comfortable for most outdoor activities. The calmest conditions occur in October, with average winds dropping to 6km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 3km/h between the calmest and windiest months.

Seasons

Winter
Dec 21
Spring
Mar 20
Summer
Jun 21
Autumn
Sep 23

89 days until Summer

It is currently spring in Osmani International Airport, which began on March 20, 2026. Osmani International Airport is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in September at around 32°C, while the coldest stretch bottoms out in January near 12°C. Summer is next, beginning on June 21, 2026 — 89 days from now.

Spring

Temperatures range from 18 to 31°C. Rainfall is heavy, totalling around 1172mm across the season with a monthly average of 391mm. Winds are generally light, averaging 8km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.

Summer

Temperatures range from 25 to 32°C. Rainfall is heavy, totalling around 2287mm across the season with a monthly average of 762mm. Winds are generally light, averaging 8km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.

Autumn

Temperatures range from 18 to 32°C. Rainfall is heavy, totalling around 651mm across the season with a monthly average of 217mm. Winds are generally light, averaging 7km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.

Winter

Temperatures range from 12 to 26°C. Rainfall is relatively light, with around 76mm over the season and a monthly average of 25mm. Winds are generally light, averaging 7km/h. A light jacket or sweater is usually sufficient, though cooler evenings may call for an extra layer.

Best Time to Visit

Jan 17°
Feb 20°
Mar 23°
Apr 25°
May 27°
Jun 28°
Jul 28°
Aug 28°
Sep 28°
Oct 27°
Nov 23°
Dec 19°

The best time to visit Osmani International Airport is during January, February, November and December, when the weather is most comfortable for travellers. During these months, average temperatures hover around 20°C with modest rainfall averaging 26mm per month. By contrast, September can be uncomfortably hot with temperatures reaching 32°C. With minimal rainfall expected, you can pack light and plan outdoor activities with confidence.

Monthly Climate Data

The table below shows monthly climate averages for Osmani International Airport based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.

Month
Min Temperature
Max Temperature
Wind Speed
Precipitation
Snow
Jan
12 °C
24 °C
7 km/h
11 mm
0 cm
Feb
14 °C
26 °C
7 km/h
37 mm
0 cm
Mar Current
18 °C
29 °C
9 km/h
141 mm
0 cm
Apr
21 °C
30 °C
8 km/h
494 mm
0 cm
May
23 °C
31 °C
8 km/h
538 mm
0 cm
Jun
25 °C
31 °C
8 km/h
876 mm
0 cm
Jul
26 °C
31 °C
8 km/h
753 mm
0 cm
Aug
26 °C
32 °C
7 km/h
658 mm
0 cm
Sep
26 °C
32 °C
7 km/h
404 mm
0 cm
Oct
23 °C
31 °C
6 km/h
221 mm
0 cm
Nov
18 °C
29 °C
7 km/h
26 mm
0 cm
Dec
14 °C
25 °C
7 km/h
27 mm
0 cm
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Metric (°C, km/h)