MERRA-2

From variable 3.3
Summary of observation-based historical datasets with 2-m temperature available
reference

source
NASA
data type
Global atmospheric reanalysis
spatial domain
Global
spatial resolution
½° latitude x ⅝° longitude
temporal coverage
1980 to present
time step
Hourly; Daily; Monthly
data format
NetCDF
comments
2nd generation reanalysis. Does not assimilate surface temperature from stations.