Weather in Khulna

Rain is the monsoon runs from May to October, inside an annual total of 1775 mm. The wettest month is July at 374 mm; the driest is January at 9 mm.

Khulna is in Bangladesh at 22.8°N. The 2001–2020 NASA POWER daily record describes a monsoon climate with a sharp wet-dry split. April is the warmest month (average 31.6°C, high 38.7°C) and January is the coolest (average 18.5°C, low 11.1°C). On this site the months that score closest to a 22°C day, lighter rain, and moderate humidity are December, January, and February.

When the score favours a visit

The three months with the highest comfort score are December, January, and February: December (19.1°C average, 14 mm, 73% humidity); January (18.5°C average, 9 mm, 61% humidity); February (23.0°C average, 21 mm, 50% humidity). Those months sit across the year end, so they are listed in season order rather than January-to-December. The score rewards averages near 22°C, lower rainfall, and humidity near 60%. It is a climate score, not a festival or price calendar.

If you want the monsoon itself — fewer crowds, greener landscape, heavier rain — aim at May–October instead of the score.

Hot and cool months in Khulna

Khulna has a 13.1°C gap between its coolest monthly average (18.5°C in January) and its warmest (31.6°C in April). That is a northern-hemisphere pattern.

Across the year the mean afternoon high is 31.5°C. If you want the smallest day–night shock, look at months where the high and low sit close together; April nights still hold 24.6°C.

Monsoon and dry months

The monsoon in Khulna starts in May and ends in October (May, June, July, August, September, and October). July is the core of it at 374 mm. January is the other extreme, with 9 mm.

Humidity peaks near 90%. That usually lines up with the wetter months rather than the hottest ones.

Distinctive months in Khulna

The year bottoms out in January. Plan for 11.1°C at night and 25.9°C in the afternoon. In February, Khulna averages 30.9°C by day and 15.1°C at night, with 21 mm of rain. March: 36.1°C high, 20.2°C low, 36 mm rain, 48% humidity. Peak heat arrives in April: 38.7°C by day, 24.6°C at night, and 58% humidity. The monsoon opens in May. Expect 195 mm and 20 rainy days, with nights around 26.3°C. In June, Khulna averages 32.9°C by day and 26.6°C at night, with 283 mm of rain.

July is the wettest month — 374 mm and 29 rainy days, with 89% humidity. August stands apart from the months beside it: 31.1°C / 25.9°C and 319 mm. September brings 245 mm and 25 rainy days; temperatures run from 25.3°C to 30.6°C. By October the monsoon is ending. Khulna still sees about 171 mm, but the next month is usually leaner. In November, Khulna averages 27.9°C by day and 17.2°C at night, with 30 mm of rain. December brings 14 mm and 1 rainy days; temperatures run from 12.6°C to 25.6°C.

Khulna and other cities in Bangladesh

Dhaka is about 132 km away: Khulna is 1.6°C warmer than Dhaka in its hottest month and 449 mm drier over the year than Dhaka. Dhaka’s wettest month is July (437 mm) versus July here.

Gazipur is about 159 km away: Khulna is 1.7°C warmer than Gazipur in its hottest month and 406 mm drier over the year than Gazipur. Gazipur’s wettest month is July (404 mm) versus July here.

Chattogram is about 239 km away: Khulna is 2.5°C warmer than Chattogram in its hottest month and 1286 mm drier over the year than Chattogram. Chattogram’s wettest month is July (782 mm) versus July here.