Estimation of evapotranspiration (ET) is needed for many applications in diverse disciplines such as agriculture, hydrology and meteorology. MODIS-based leaf area index (LAI) and surface temperature (T_s) were used to examine ET at six sites in Jordan using the dimensionless temperature D_T, defined as (T_i –T_a)/(T_max – T_a), where T_i is the aerodynamics surface temperature, T_a is the air temperature and T_max is the surface temperature that would occur if all the net radiation (R_n-G) was converted to sensible heat flux and no evaporation occurred. An analytical-land-atmosphere-radiometer model (ALARM) has been used to convert T_s taken at any zenith view angle to T_i, at a defined scalar roughness length. The T_i is the temperature that gives the correct value of H at a specified value of the scalar roughness length. For all locations of the study but Irbed, the minimum D_T (D_Tmin) ranged from 0.36 to 0.52 while the maximum D_T (D_Tmax) ranged from 0.74 to 0.80. The minimum ET (ET_min), for all locations but Irbed, ranged from 0.7 to 1.5 mm d^-1 while the maximum ET (ET_max) ranged from 2.4 to 3.6 mm d^-1. For Irbed, D_T ranged from –0.60 to 0.61 while ET ranged from 1.2 to 6.5 mm d^-1. The lower D_T and the higher ET_max in Irbed was due to wet conditions prior to the period of estimation and the sensible heat advection. Results of the study coincided with the meteorological records that indicated the occurrence of advection during that period, a well-known phenomenon that usually results in crop failure in the area. Irbed's ET for the wet days was in close agreement with the potential ET estimated using Priestley-Taylor method, indicating the potential role of the contemporary technology of remote sensing in providing real time and spatial data on ET in the different ecological zones.