Indonesia Climate
Top 5 Cities: Jakarta, Surabaya, Bandung, Medan, and Semarang
This month in numbers
Indonesia experienced its 16th warmest April on record, with an average temperature of 25.51°C, an anomaly of +0.9°C compared to the 1961–1990 baseline. Globally, April 2026 was the 2nd warmest April for land temperatures on record, with an anomaly of +1.1°C.
What changed
The period of February to April 2026 was the 7th warmest on record for Indonesia, with an average temperature of 25.6°C, marking a significant anomaly of +1.2°C against the 1961–1990 baseline. This warming trend in Indonesia aligns with the broader global picture, as global land temperatures for the same three-month period also ranked as the 2nd warmest on record, with an anomaly of +1.2°C. Indonesia's 1-month anomaly ranks 180th out of 234 regions, while its 3-month anomaly is 172nd out of 234.
What’s driving change?
Indonesia is currently experiencing a transition towards a prolonged and drier-than-average dry season, influenced by the anticipated emergence of El Niño, which typically brings warmer and drier conditions to Maritime Southeast Asia. The Meteorology, Climatology and Geophysics Agency (BMKG) forecasts that most regions will enter the dry season between late March and May, with its peak expected in August, and a longer duration than the 30-year average for some areas. This coincides with a recent drought event that has been active since late January 2026, representing 100% of the annual total for such events in Indonesia, an unusual concentration. Additionally, a flood event was recorded from early March to late May 2026, with major flooding occurring in Nunukan Regency, North Kalimantan, in late February and early March due to heavy rainfall and overflowing rivers. Further floods and landslides were reported across parts of Java in early March and early May. More information on these events can be found at Extreme Weather tracker.
Looking ahead
The NOAA CPC forecast indicates a high probability of El Niño developing and strengthening through the coming months, suggesting continued warmer and drier conditions for Indonesia, particularly from May to October.
Generated by Gemini from climate data and web sources
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Data Sources
Data Sources for Indonesia
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.
FAQs
FAQs
How is the climate in Indonesia changing?
Indonesia 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 trend rate is shown as °C per decade in the headline panel; you can also see the warmest and coolest years on file.
Where does the climate data for Indonesia come from?
Climate data for Indonesia 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 Indonesia climate data cover?
The Indonesia climate profile covers Jakarta, Surabaya, Bandung, Medan and surrounding areas. Temperature, rainfall and emissions data for Indonesia
How often is the Indonesia climate update refreshed?
The Indonesia 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.