Climate Data

HadGHCNDEX - Gridded Daily Temperature Extremes

HadGHCND (aka HadGHCNDEX) is a gridded daily dataset of near-surface maximum (TX) and minimum (TN) temperature observations. Anomalies (departures from 1961-1990 climatology) and actual temperatures are distributed in two separate files. The dataset is designed primarily for the analysis of climate extremes and also for climate model evaluation. It spans the years 1950 to present and is available on a 2.5° latitude by 3.75° longitude grid. The data are gridded using an angular distance weighting scheme. Input data consists of approximately 3000 stations within the Global Historical Climatology Network (GHCN) daily data base. Stations with 20 or more years of record were selected for gridding.

Key Strengths:

  • Long record of daily temperature extremes

Key Limitations:

  • Fewer indices than GHCHNDEX or HadEX2
  • Sparse coverage in Southern Hemisphere and Tropics

Years of Record

1950/01 to 2011/12
temporal metadataID:




Data Time Period Extended?

yes, data set is extended


Spatial Resolution

2.5 x 3.75

Ocean or Land

Land Only

Missing Data Flag

missing data present

Vertical Levels

Input Data

station data

Earth system components and main variables

Data Access: Please Cite data sources, following the data providers' instructions.

Key Figures

Click the thumbnails to view larger sizes



Climate Data Guide Image: HadGHCND HadGHCND daily maximum temperature anomalies for 1 Jan 2007 and 5 July 2. (Climate Data Guide; D. Shea)

Cite this page

National Center for Atmospheric Research Staff (Eds). Last modified 05 May 2014. "The Climate Data Guide: HadGHCNDEX - Gridded Daily Temperature Extremes." Retrieved from

Acknowledgement of any material taken from this page is appreciated. On behalf of experts who have contributed data, advice, and/or figures, please cite their work as well.