Data Download
All India Drought Monitor products are provided as plain-text gridded files. Each line is
latitude longitude value on a 0.25° grid. The Combined Drought Index also
has a weekly time series back to July 2021.
Current grids
| Product | Description | File |
|---|---|---|
| Combined Drought Index | Latest weekly CDI (drier < 0) | Current_CDI.txt |
| CDI forecast — 7 day | Expected CDI one week ahead | Future_CDI_7day.txt |
| CDI forecast — 15 day | Expected CDI two weeks ahead | Future_CDI_15day.txt |
| CDI forecast — 30 day | Expected CDI one month ahead | Future_CDI_30day.txt |
Standardised indices
| Index | Meaning | Accumulation windows |
|---|---|---|
| SPI | Standardised Precipitation Index | 1mo · 2mo · 3mo · 4mo · 6mo · 9mo · 12mo · 24mo |
| SRI | Standardised Runoff Index | 1mo · 2mo · 3mo · 4mo · 6mo · 9mo · 12mo · 24mo |
| SSMI | Standardised Soil Moisture Index | 1mo · 2mo · 3mo · 4mo · 6mo · 9mo · 12mo · 24mo |
Time series
| Product | Description | File |
|---|---|---|
| National drought area | Weekly % of India in each class (year, month, day, then class shares) | India_Drought_Area_Timeseries.txt |
| Weekly CDI frames | One grid per week, data/Drough_TS/CDI_YYYYMMDD.txt | latest week |
Boundaries
| File | Description |
|---|---|
| state_vector_boundaries.json | State / UT polygon paths with names and ids |
| states_with_boundaries.csv | Rasterised state-id grid (0.0625°) |
| india_mainland_boundary.csv | National outline |
Licence & citation
Licence. Unless stated otherwise, these data are released under a Creative Commons Attribution 4.0 International (CC BY 4.0) licence — you may share and adapt them, including commercially, with attribution.
Suggested citation. Water and Climate Lab, IIT Gandhinagar. India Drought Monitor — Combined Drought Index and related products. indiadroughtmonitor.in (accessed YYYY-MM-DD).
Weekly archive. Every weekly grid is available at the same path for any week from July 2021 onward — substitute the date in data/Drough_TS/CDI_YYYYMMDD.txt (for example data/Drough_TS/CDI_20260603.txt).