Chattogram climate
Chattogram (Bangladesh) has a tropical monsoon climate (Köppen Am). The average temperature over the year is 26 °C78 °F, and about 3,061 mm121 in of precipitation falls in an average year.
Temperature by month
Precipitation by month
Chattogram climate table
| Month | High °C°F | Low °C°F | Mean °C°F | Precip. mmin |
|---|---|---|---|---|
| Jan | 2475 | 1356 | 1965 | 90.3 |
| Feb | 2882 | 1661 | 2271 | 190.8 |
| Mar | 3289 | 2170 | 2679 | 411.6 |
| Apr | 3391 | 2576 | 2983 | 1265.0 |
| May | 3289 | 2679 | 2984 | 30512 |
| Jun | 3187 | 2680 | 2983 | 55122 |
| Jul | 3086 | 2679 | 2882 | 78231 |
| Aug | 3086 | 2679 | 2882 | 53121 |
| Sep | 3086 | 2678 | 2882 | 39516 |
| Oct | 3086 | 2476 | 2781 | 2339.2 |
| Nov | 2882 | 2067 | 2475 | 562.2 |
| Dec | 2576 | 1559 | 2068 | 140.5 |
| Year | 3391 | 1356 | 2678 | 3,061121 |
“Year” row: highest monthly high, lowest monthly low, annual mean and annual total.
| Month | Humid. | Cloud | Solar | Daylight |
|---|---|---|---|---|
| Jan | 71% | 25% | 4.4 | 10:54 |
| Feb | 62% | 26% | 5.2 | 11:23 |
| Mar | 63% | 36% | 5.8 | 11:58 |
| Apr | 71% | 48% | 6.0 | 12:39 |
| May | 79% | 65% | 5.6 | 13:12 |
| Jun | 87% | 87% | 4.6 | 13:30 |
| Jul | 89% | 91% | 4.6 | 13:22 |
| Aug | 89% | 90% | 4.8 | 12:54 |
| Sep | 87% | 84% | 4.7 | 12:15 |
| Oct | 83% | 56% | 4.6 | 11:35 |
| Nov | 79% | 30% | 4.6 | 11:02 |
| Dec | 78% | 28% | 4.2 | 10:46 |
Humid. = average relative humidity at 2 m; cloud = average cloud amount; solar = average daily solar energy reaching the ground in kWh/m² (all-sky); daylight in hours:minutes, calculated for the 15th of each month.
What the climate of Chattogram is like
The warmest month is May, with an average high of 32 °C89 °F and a low of 26 °C79 °F. The coldest is January, when highs average 24 °C75 °F and lows 13 °C56 °F. There is a clear seasonal cycle, with 10.3 °C18.6 °F between the average temperature of the warmest and the coolest month.
It is very wet, receiving about 3,061 mm121 in of precipitation per year. The wettest three-month stretch is June–August, which brings 61% of the annual total. Months with less than 20 mm0.8 in on average: December–February. The wettest month is July (782 mm31 in), the driest is January (9 mm0.3 in).
Relative humidity ranges from 62% in February to 89% in July. The clearest skies (lowest average cloud amount, 25%) are typical of January. Average wind speed near the ground ranges from 6 km/h (4 mph) in November to 13 km/h (8 mph) in July. Daylight lasts from about 10.8 hours in December to 13.5 hours in June.
Best time to visit Chattogram
Based on these averages, the most comfortable months for sightseeing and outdoor activities are November–February: average highs of 24 °C75 °F to 28 °C82 °F with 9 mm0.3 in to 56 mm2.2 in of precipitation per month.
The most challenging month is July, which is hot, with average highs of 30 °C86 °F, very wet (782 mm31 in) and humid (89% relative humidity).
Comfort score: months are ranked by how close they come to an average high of 21–28 °C (70–82 °F), lows above 5 °C (41 °F), little precipitation and moderate humidity. The best-ranked months of each place are recommended, even where none meets all of these. These are general rules of thumb applied to long-term averages.
Chattogram weather by month
- January24 °C75 °F / 13 °C56 °F
- February28 °C82 °F / 16 °C61 °F
- March32 °C89 °F / 21 °C70 °F
- April33 °C91 °F / 25 °C76 °F
- May32 °C89 °F / 26 °C79 °F
- June31 °C87 °F / 26 °C80 °F
- July30 °C86 °F / 26 °C79 °F
- August30 °C86 °F / 26 °C79 °F
- September30 °C86 °F / 26 °C78 °F
- October30 °C86 °F / 24 °C76 °F
- November28 °C82 °F / 20 °C67 °F
- December25 °C76 °F / 15 °C59 °F
What to pack for Chattogram
- Wetter months (May–September) — highs 3086 to 32 °C89 °F, lows around 26 °C78 °F, about 513 mm20 in of precipitation a month. Pack very light, breathable clothing, a sun hat and plenty of water and a good rain jacket or umbrella and quick-drying shoes.
- Drier months (October–April) — highs 2475 to 33 °C91 °F, lows 1356 to 25 °C76 °F, about 71 mm2.8 in of precipitation a month. Pack light summer clothes such as T-shirts, shorts or light dresses.
How Chattogram compares
Compared with Dhaka, about 211 km to the northwest, Chattogram has practically the same average temperature and receives 38% more precipitation (3,061 mm121 in vs 2,224 mm88 in). The difference is largest in November (1.1 °C2 °F warmer).
Of the 35 places in Bangladesh covered by World Climates, Chattogram is the 15th warmest by annual mean temperature and the 3rd wettest by annual precipitation. See all of them on the Bangladesh climate page.
Places in other countries with the most similar temperature and rainfall pattern: Agartala (India, Cwa), Silchar (India, Cwa) and Haldia (India, Aw).
The same NASA POWER grid cell also contains Hathazari (pop. 498,179). Their long-term averages in this dataset are essentially the same as for Chattogram, so they do not have separate pages.
Nearby places
- Karnaphuli 57 km · 26 °C79 °F · 2,540 mm100 in
- Maijdi 95 km · 25 °C77 °F · 2,802 mm110 in
- Coxs Bazar 102 km · 26 °C79 °F · 5,320 mm209 in
- Comilla 141 km · 25 °C77 °F · 2,395 mm94 in
- Barishal 156 km · 26 °C78 °F · 2,857 mm112 in
- Chandpur 156 km · 25 °C78 °F · 2,468 mm97 in
- Agartala 176 km · 25 °C78 °F · 2,295 mm90 in
- Aizawl 179 km · 19 °C66 °F · 2,143 mm84 in
Frequently asked questions
What is the warmest month in Chattogram?
May is the warmest month in Chattogram, with an average high of 32 °C (89 °F) and an average low of 26 °C (79 °F).
What is the coldest month in Chattogram?
January is the coldest month, with an average high of 24 °C (75 °F) and an average low of 13 °C (56 °F).
When does it rain the most in Chattogram?
July is the wettest month with about 782 mm (30.8 in) of precipitation; January is the driest with about 9 mm (0.3 in).
What is the best time to visit Chattogram?
Judging by long-term averages, the most comfortable months are November–February.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.