This project automates the downloading and merging of hourly climate data from NASA POWER API.
✅ Downloads hourly weather data (2015–2025)
✅ Splits requests into smaller chunks (1 year per request)
✅ Cleans and removes unnecessary headers from downloaded CSV files
✅ Automatically merges data into a single CSV file
✅ Saves cleaned and merged data in organized directories
✅ Handles API errors with a retry mechanism
📦 nasa-power-downloader
├── 📂 data/ # Stores all data files
│ ├── 📂 cleaned/ # Stores cleaned CSV files (without headers)
│ └── 📂 merged/ # Stores the final merged CSV file
├── 📂 scripts/ # Python scripts for downloading & merging
├── 📜 README.md # Project documentation
├── 📜 LICENSE # Open-source license
└── 📜 config.py # API settings
The following meteorological parameters are included in the downloaded dataset:
| Parameter | Description | Unit |
|---|---|---|
| ALLSKY_SFC_SW_DWN | All Sky Surface Shortwave Downward Irradiance (CERES SYN1deg) | Wh/m² |
| T2M | Temperature at 2 Meters (MERRA-2) | °C |
| RH2M | Relative Humidity at 2 Meters (MERRA-2) | % |
| PS | Surface Pressure (MERRA-2) | kPa |
| WS10M | Wind Speed at 10 Meters (MERRA-2) | m/s |
| WD10M | Wind Direction at 10 Meters (MERRA-2) | Degrees |
| WS50M | Wind Speed at 50 Meters (MERRA-2) | m/s |
| WD50M | Wind Direction at 50 Meters (MERRA-2) | Degrees |
| RHOA | Surface Air Density (MERRA-2) | kg/m³ |
| QV10M | Specific Humidity at 10 Meters (MERRA-2) | g/kg |
| CLOUD_AMT | Cloud Amount (CERES SYN1deg) | % |
git clone https://github.com/FahimFBA/nasa-power-downloader.git
cd nasa-power-downloader
pip install -r scripts/requirements.txt
Edit config.py to change location and parameters.
python scripts/download_nasa_power.py
python scripts/merge_csv.py
The cleaned files will be saved in:
📂 data/cleaned/
The final merged dataset will be saved as:
📜 data/merged/merged_data.csv
This project is licensed under the MIT License. See LICENSE for details.
Md. Fahim Bin Amin – fahimbinamin@gmail.com
GitHub: @FahimFBA