Actuaries Climate Index data is available for download. Data is currently available through May 2019 (Spring 2019). Download monthly and seasonal data by region and component.
Meteorological seasons are defined as follows:
- Winter = December, January, February
- Spring = March, April, May
- Summer = June, July, August
- Fall = September, October, November
In April of 2019, to address some gaps in the underlying data, we modified the calculation methodology, as described in the Data Disclosure. The new methodology is used for all releases from April of 2019 onwards. If you wish to see results produced using the old methodology, you may download them here: Results Using Prior Methodology.