Climate Insights for Osmani International Airport

Sylhet, Sylhet Division, Bangladesh

Hottest
August
33°C peak
Coldest
January
12°C low
Wettest
July
738mm 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 25°C and approximately 4238mm of precipitation falls per year. July is the wettest month, receiving around 738mm 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: August, September, June. 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: 27° Average: 20° Min: 15° Mar Max: 30° Average: 24° Min: 19° Apr Max: 30° Average: 25° Min: 22° May Max: 31° Average: 27° Min: 24° Jun Max: 32° Average: 28° Min: 26° Jul Max: 31° Average: 28° Min: 26° Aug Max: 33° Average: 29° Min: 27° Sep Max: 32° Average: 28° Min: 26° Oct Max: 31° Average: 27° Min: 24° Nov Max: 29° Average: 23° Min: 18° Dec Max: 26° Average: 19° Min: 14°
Max
Average
Min

Temperatures in Osmani International Airport vary considerably across the year, with a 21°C difference between the coldest and warmest months. The warmest month is August, when average highs reach 33°C and the mean temperature sits around 29°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 October and November, 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 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Precipitation: 13mm Feb Precipitation: 43mm Mar Precipitation: 173mm Apr Precipitation: 635mm May Precipitation: 583mm Jun Precipitation: 698mm Jul Precipitation: 738mm Aug Precipitation: 540mm Sep Precipitation: 467mm Oct Precipitation: 280mm Nov Precipitation: 32mm Dec Precipitation: 36mm
Precipitation

Osmani International Airport is a very wet location, receiving approximately 4238mm of precipitation annually, which averages out to around 353mm per month. The wettest month is July, averaging 738mm of rainfall. June and April also tend to see above-average precipitation. The driest month is January, with just 13mm. That's 724mm less than July, 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 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Wind Speed: 1km/h Feb Wind Speed: 1km/h Mar Wind Speed: 1km/h Apr Wind Speed: 2km/h May Wind Speed: 1km/h Jun Wind Speed: 1km/h Jul Wind Speed: 2km/h Aug Wind Speed: 1km/h Sep Wind Speed: 1km/h Oct Wind Speed: 1km/h Nov Wind Speed: 1km/h Dec Wind Speed: 1km/h
Wind Speed

Osmani International Airport is relatively calm, with an average annual wind speed of 1km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is July, averaging 2km/h, though still comfortable for most outdoor activities. The calmest conditions occur in January, with average winds dropping to 1km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 1km/h gap between the calmest and windiest months.

Seasons

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

3 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 August at around 33°C, while the coldest stretch bottoms out in January near 12°C. Summer is next, beginning on June 21, 2026 — 3 days from now.

Spring

Temperatures range from 19 to 31°C. Rainfall is heavy, totalling around 1391mm across the season with a monthly average of 464mm. Winds are generally light, averaging 1km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.

Summer

Temperatures range from 26 to 33°C. Rainfall is heavy, totalling around 1976mm across the season with a monthly average of 659mm. Winds are generally light, averaging 1km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.

Autumn

Temperatures range from 18 to 32°C. Rainfall is heavy, totalling around 779mm across the season with a monthly average of 260mm. Winds are generally light, averaging 1km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.

Winter

Temperatures range from 12 to 27°C. Rainfall is relatively light, with around 92mm over the season and a monthly average of 31mm. Winds are generally light, averaging 1km/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 24°
Apr 25°
May 27°
Jun 28°
Jul 28°
Aug 29°
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 31mm per month. By contrast, August can be uncomfortably hot with temperatures reaching 33°C. A light rain jacket is recommended, though showers are generally brief and shouldn't disrupt your plans.

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
1 km/h
13 mm
0 cm
Feb
15 °C
27 °C
1 km/h
43 mm
0 cm
Mar
19 °C
30 °C
1 km/h
173 mm
0 cm
Apr
22 °C
30 °C
2 km/h
635 mm
0 cm
May
24 °C
31 °C
1 km/h
583 mm
0 cm
Jun Current
26 °C
32 °C
1 km/h
698 mm
0 cm
Jul
26 °C
31 °C
2 km/h
738 mm
0 cm
Aug
27 °C
33 °C
1 km/h
540 mm
0 cm
Sep
26 °C
32 °C
1 km/h
467 mm
0 cm
Oct
24 °C
31 °C
1 km/h
280 mm
0 cm
Nov
18 °C
29 °C
1 km/h
32 mm
0 cm
Dec
14 °C
26 °C
1 km/h
36 mm
0 cm
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