Historical Data Download (hourly-average)

Community Weather Information Network (CoWIN) data policy

1. Access to these CoWIN data is unlimited and provided without charge.
2. The CoWIN gives no warranty, expressed or implied, as to the accuracy, reliability, or completeness of these dataset. The entire risk of use of the data shall be with the user.
3. When publishing data retrieved from the CoWIN, you are expected to acknowledge the contributors who author these data as the CoWIN as data source, and cite the journal paper of data quality control ( Lam et al., 2021. https://doi.org/10.1016/j.uclim.2021.100852 ).
4. Please inform us if you publishing journal paper using the data retrieved from CoWIN. We would put a link of your journal paper on our publications page.

• All data are stored in CSV file format.
• File "remark.txt" stores meta data, such as units of the values.
• "available.csv" lists information of weather stations and which months the stations storing weather data.
• "disclaimer.txt" is disclaimer and data policy.

The algorithm we used for the QC tests is described here.

Note: the rainfall data on years 2018-2021 downloaded before 11th January, 2022 might be incorrectly calculated. It is now corrected.