Chittagong climate — normals and trends
Chittagong (Bangladesh) has a tropical monsoon climate (Am) under the Köppen-Geiger classification. Its mean annual temperature is 25.7 °C and it receives 3,000 mm of precipitation per year.
These figures are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme.
The warmest month is May (28.2 °C on average) and the coldest is January (20.5 °C). Rainfall peaks in July.
Chittagong averages 0 frost days, 38 hot days (≥ 30 °C) and 178 rainy days per year.
Chittagong has warmed by +0.7 °C between 1940 and 2025, or +0.08 °C per decade. This trend is statistically significant.
The hottest day of the period reached 34.1 °C (on 22 April 2014) and the coldest 13.8 °C (on 10 January 2013).
Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.
Climate normals · ERA5
ChittagongChittagong
- coords
- 22.34°, 91.83°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
25.7°C
Average daily high
27.5°C
Average daily low
24.0°C
Annual rainfall
3,000mm
Sunshine / day
9.4h
Mean relative humidity
81%
Average peak wind
19.7km/h
Seasonal range
7.7°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
38 d/yr
Rainy days (≥ 1 mm)
178 d/yr
Annual snowfall
0.0 cm
Average feels-like high
31.2 °C
Average feels-like low
26.7 °C
Average peak gust
30.4 km/h
Tropical nights (≥ 20 °C)
298 d/yr
Solar radiation
17.3 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+0.7 °C
since 1940
+0.1 °C per decade · r² = 0.42 · p = < 0.001
Trend fitted by linear regression (ordinary least squares) on annual means. A trend is shown only when it is statistically significant (p < 0.05).
A climograph overlays rainfall (bars) and temperature (line): the standard reading in climatology, where you can see at a glance whether the warm season is also the dry one.
Records for the period
Hottest day
34.1 °C
22 April 2014
Coldest day
13.8 °C
10 January 2013
Wettest day
413 mm
11 June 2018
Windiest day
78.3 km/h
30 April 1991
Strongest gust
143.6 km/h
30 April 1991
Hottest feels-like
41.8 °C
18 August 2022
Coldest feels-like
11.2 °C
13 January 1989
Sunniest day
12.8 h
3 June 1942
Normals computed over complete calendar years 1940–2025.
A specific year
Pick a year and see how it compares to normal — warmer, drier or more extreme than usual?
Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 23.9 °C | +0.5 °C | 0 mm | -8 mm |
| Feb | 26.1 °C | +1.0 °C | 3 mm | -14 mm |
| Mar | 28.5 °C | +0.7 °C | 0 mm | -53 mm |
| Apr | 29.6 °C | +0.5 °C | 69 mm | -64 mm |
| May | 30.4 °C | +0.8 °C | 450 mm | +161 mm |
| Jun | 29.3 °C | +0.3 °C | 759 mm | +104 mm |
| Jul | 28.6 °C | +0.2 °C | 815 mm | +151 mm |
| Aug | 29.0 °C | +0.6 °C | 513 mm | +9 mm |
| Sep | 29.8 °C | +1.1 °C | 296 mm | -66 mm |
| Oct | 30.0 °C | +1.2 °C | 149 mm | -84 mm |
| Nov | 28.2 °C | +1.0 °C | 42 mm | -21 mm |
| Dec | 24.7 °C | +0.2 °C | 0 mm | -20 mm |
The year's extremes
What was the weather like that day?
Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.
Frequently asked questions
What is the climate of Chittagong?
Chittagong has a tropical monsoon climate (Köppen Am). Over 1940-2025, the average annual temperature is 25.7 °C and it receives 3,000 mm of precipitation per year.
What is the hottest day ever recorded in Chittagong?
The hottest day measured in Chittagong between 1940 and 2025 was 22 April 2014, reaching 34.1 °C.
What is the coldest day in Chittagong?
The coldest day measured in Chittagong between 1940 and 2025 was 10 January 2013, at 13.8 °C.
Does it snow in Chittagong?
Almost never: Chittagong sees virtually no snow, with about 0 frost days per year.
Has the climate of Chittagong warmed?
Yes: Chittagong warmed by +0.7 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Chittagong?
The wettest day measured in Chittagong between 1940 and 2025 was 11 June 2018, with 413 mm of rain in 24 hours.
What was the windiest day in Chittagong?
The windiest day measured in Chittagong between 1940 and 2025 was 30 April 1991, with winds reaching 78.3 km/h.
What is the warmest month in Chittagong?
The warmest month in Chittagong is May (28.2 °C on average); the coldest is January (20.5 °C).
How much does it rain in Chittagong?
Chittagong receives on average 3,000 mm of precipitation per year, spread over about 178 rainy days.
Is it sunny in Chittagong?
Chittagong gets on average 9.4 hours of sunshine per day, roughly 3,431 hours per year over 1940-2025.
Are there tropical nights in Chittagong?
Yes: Chittagong has on average 298 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Chittagong?
In Chittagong, between 1940 and 2025, the highest apparent temperature reached 41.8 °C on 18 August 2022, and the lowest was 11.2 °C on 13 January 1989.
Compare Chittagong with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Chittagong