Khulna is warmest in April, averaging 40° by day and 24° at night. The wettest month is August with 412 mm, and the year brings about 2210 mm in total.
Month by month
| Month | High | Low | Rain | Daylight | Good for |
|---|---|---|---|---|---|
| January | 24° | 11° | 25 mm | 10.7 h | Sightseeing |
| February | 29° | 15° | 28 mm | 11.2 h | Beach weather |
| March | 35° | 20° | 56 mm | 11.8 h | Beach weather |
| April | 40° | 24° | 81 mm | 12.5 h | Very hot |
| May | 35° | 26° | 316 mm | 13.1 h | Rainy season |
| June | 32° | 27° | 297 mm | 13.4 h | Rainy season |
| July | 32° | 26° | 304 mm | 13.3 h | Rainy season |
| August | 31° | 26° | 412 mm | 12.8 h | Rainy season |
| September | 31° | 25° | 357 mm | 12.1 h | Rainy season |
| October | 30° | 23° | 267 mm | 11.5 h | Rainy season |
| November | 28° | 17° | 27 mm | 10.9 h | Beach weather |
| December | 25° | 13° | 40 mm | 10.6 h | Sightseeing |
High and low are average daily maximum and minimum, rain is typical monthly total, daylight is the hours between sunrise and sunset mid-month. Climate normals from NASA POWER — averages, not promises.
When to go
Beach weather: February, March and November — highs around 30°, nights no colder than 15°, and at most 56 mm of rain in a month.
Walking the city: January and December — highs of 24–25° and no more than 40 mm of rain a month.
Wet season: May, June, July, August, September and October — up to 412 mm in a single month.
Serious heat: In April the average high reaches 40°.