Bangladesh Climate – July 2026 Update
Top 5 Cities: Dhaka, Chittagong, Khulna, Rajshahi, and Sylhet
Summary
The latest month brought above-average warmth to Bangladesh as the country recorded its 14th warmest July on record, while torrential monsoon downpours triggered catastrophic flash floods and landslides across south-eastern districts that impacted over a million people. The region is navigating a moderate El Niño forecast to peak at Very Strong in Oct-Dec, with active monsoon conditions expected to give way to elevated heat risks into early autumn.
This month in numbers
Bangladesh recorded a monthly average temperature of 28.65°C in July 2026, sitting 0.9°C above the 1961-1990 baseline and making it the 14th warmest month of its kind in 87 years of record-keeping. The broader May to July period averaged 28.58°C, representing a 0.6°C anomaly and ranking as the 22nd warmest such 3-month stretch. By comparison, global land temperatures reached extraordinary levels, with the three-month period through July ranking as the 2nd warmest on record globally, boosted by a monthly land anomaly of 1.6°C that ranked 3rd highest ever.
What changed
The recent warmth fits into a persistent warming pattern across South Asia, following 2025 when Bangladesh registered its 6th warmest full year on record at 25.84°C against a long-term background warming trend of +0.78°C. On the global stage, Bangladesh ranked 186th out of 232 tracked regions for its July thermal anomaly and 215th for the 3-month period. Within its regional group context, Bangladesh ran 0.62°C cooler than the Asian average this month, standing well behind regional warming hubs like South Korea, as tracked on Asia.
What’s driving change?
Regional climate patterns reflect broader planetary trends where waters, alongside ongoing that makes seasonal rains increasingly erratic. The region is currently experiencing a moderate ENSO phase with El Niño conditions, tracked live at ENSO. Heavy monsoon depressions produced deadly flash floods and landslides that killed dozens of people in Cox's Bazar and Chattogram. While catastrophic locally, this weather emergency did not register on our satellite tracking network, which currently monitors large-scale disaster clusters like 36 wildfires in Angola (Extreme Weather tracker).
Looking ahead
With a moderate El Niño expected to strengthen towards a Very Strong peak during the Oct-Dec period, seasonal forecasts point towards warmer and drier than average conditions taking hold across Bangladesh into autumn.
Generated by Gemini from climate data and web sources
At a Glance
Temperature – Average
Climate Map – Global
Source: NOAA Climate at a Glance (countries & continents) · Met Office (UK) · US states & climate regions. Anomalies are vs the 1961–1990 baseline. See methodology.
Typical Climate – Bangladesh
Köppen Cwa · TemperateBangladesh has a temperate climate (Köppen Cwa: Humid subtropical (dry winter)), with both a warm/cold cycle and a wet/dry cycle through the year. June is typically the warmest month, averaging 29.1°C, while January is the coldest at 18.0°C. Annual precipitation averages around 2273mm, concentrated mostly in the wet season.
Monthly climate normals (2016–2025) - bar colour and height show average temperature, the shaded area shows average monthly precipitation.
Data: Our World in Data / NOAA (precipitation: GPCC (DWD); frost: World Bank CCKP).
Long-Term Trends
Combined Timeline – Bangladesh
Precipitation, Sunshine, Frost and Snow are converted to standard deviations from their own average so they can share an axis with Temperature.
Data: Our World in Data / NOAA (precipitation: GPCC (DWD); frost: World Bank CCKP).
Heatwave Days – Bangladesh
Warm Spell Duration Index (WSDI) - days in a 6+ day run above the local 90th-percentile temperature for that time of year.
Data: World Bank Climate Change Knowledge Portal (ERA5-derived). Refreshed roughly 1-2x/year, ~7-8 months behind present.
Year-on-Year Trends
The 4byo Climate Helix – Bangladesh
Data: Our World in Data / NOAA (precipitation: GPCC (DWD); frost: World Bank CCKP).
Monthly Temperature – Bangladesh
Background lines show the last 40 years (plus the record year and its opposite, wherever they fall).
Data: Our World in Data / NOAA (precipitation: GPCC (DWD); frost: World Bank CCKP).
Records – Bangladesh
Our World in Data / NOAA (precipitation: GPCC (DWD); frost: World Bank CCKP) - Anomalies vs 1901-2000 mean
Shifting Seasons
Warm/cold + wet/dryKöppen Aw · TropicalBangladesh has both a clear warm/cold cycle (±4.7°C) and a wet/dry cycle (94× wet:dry ratio). Both sides of the annual rhythm are shown below.
Monthly precipitation climatology. A “wet month” exceeds the baseline monthly mean (dashed gold line). Biggest month-to-month shift: Apr (-43 mm, -26%).
Data: Our World in Data / NOAA (precipitation: GPCC (DWD); frost: World Bank CCKP).
Climate Systems
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Emissions & Energy
Explore
Explore Climate Data
Data Sources
Data Sources for Bangladesh
Every figure on this page is sourced from official, openly published climate datasets. Anomalies are calculated against the 1961–1990 baseline (temperature) and 1991–2020 (rainfall, sunshine, frost) - see the Methodology & Sources page for the complete dataset list and update calendar.
Country-level temperature anomaly, sourced from Copernicus ERA5 and Hadley HadCRUT5.
Annual country and global CO₂ emissions, from the Global Carbon Project.
Monthly rainfall - Global Precipitation Climatology Centre (DWD) preferred, World Bank CCKP/CRU TS fallback where GPCC lacks direct coverage.
Frost Days and Heatwave Days (Warm Spell Duration Index), ERA5-derived. World Bank Climate Change Knowledge Portal.
Monthly snow water-equivalent, Global Precipitation Climatology Centre (DWD).
FAQs
FAQs
How is the climate in Bangladesh changing?
Bangladesh is warming in line with the rest of the world. The page above shows the latest monthly temperature anomaly versus the 1961-1990 baseline, the long-term annual trend, and the region's rank in the historical record. The headline panel also shows the long-term trend rate per decade and the warmest and coolest years on file.
What is the climate like in Bangladesh?
Bangladesh has a temperate climate (Köppen Cwa: Humid subtropical (dry winter)), with both a warm/cold cycle and a wet/dry cycle through the year. June is typically the warmest month, averaging 29.1°C, while January is the coldest at 18.0°C. Annual precipitation averages around 2273mm, concentrated mostly in the wet season.
Where does the climate data for Bangladesh come from?
Climate data for Bangladesh comes from Our World in Data, sourcing Copernicus ERA5 and HadCRUT5 (national temperature anomaly) and the Global Carbon Project via Our World in Data (CO₂ emissions), refreshed every month, when the upstream temperature and rainfall data are refreshed.
What is the climate baseline used on this page?
Anomalies on this page are calculated against the 1961-1990 climatological baseline, which is the standard reference period used by the Met Office, NOAA, IPCC and most national climate services. Some panels also show the source-native 1901-2000 (NOAA) or 1991-2020 (WMO) baselines for verification. See Methodology & Sources for the full reference.
Which areas does the Bangladesh climate data cover?
The Bangladesh climate profile covers Dhaka, Chittagong, Khulna, Rajshahi and surrounding areas. Temperature, rainfall and emissions data for Bangladesh
How often is the Bangladesh climate update refreshed?
The Bangladesh climate update is refreshed monthly, typically a few days after the previous month closes and the upstream provider (Met Office HadUK-Grid, NOAA Climate at a Glance, Copernicus ERA5 or the Global Carbon Project) publishes its update. See the Climate Rankings for cross-region comparisons.
What counts as a Heatwave Day on the Bangladesh climate page?
Heatwave Days use the Warm Spell Duration Index (WSDI) - the WMO/ETCCDI-standard heatwave measure: days that are part of a run of 6 or more consecutive days above the local 90th-percentile temperature for that calendar day. The 90th-percentile threshold varies by time of year (a hot day in January is judged differently to one in July) but is fixed to the 1961-1990 baseline for every year shown - it does not shift as the climate warms, which is why Heatwave Days trend upward over time.
Does the Bangladesh climate page include frost and snow data?
Yes. Frost Days (days with a minimum temperature below 0°C, World Bank CCKP) and snow water-equivalent (GPCC) are shown alongside temperature and precipitation, each measured against the 1961-1990 baseline where a like-for-like historical comparison is available.