El Niño – Southern Oscillation (ENSO) is the mode of interannual variability associated with the changes in winds and sea surface temperatures in the tropical Pacific region. Changes in tropical convection affect the general circulation of the atmosphere and the effects of ENSO can be transferred to distant regions of the world through the mechanism of teleconnections. The impacts in the Pacific have been thoroughly studied, while the impacts on Europe and the North Atlantic are still being investigated. Recent research indicates that ENSO's influence on European climate is non-stationary and varies by season. This study investigates the influence of different oceanic basins on precipitation in the North Atlantic-European (NAE) and Pacific North-American (PNA) regions during the July-August-September (JAS) season, by using the precipitation data from numerical simulations with the SPEEDY model for the period 1855-2010. The years were classified into ENSO years and non-ENSO years based on the calculated Niño 3.4 index in the JAS season. Precipitation anomalies of the numerical simulations were used to calculate precipitation signal fields, which were then displayed using polar stereographic projection for the Northern Hemisphere from 40°N to 90°N. When considering all years, it was found that the tropical Atlantic has the greatest impact on precipitation in the NAE region, but during El Niño years, the tropical Pacific is the oceanic basin with the greatest impact. Finally, the signal fields are averaged over the NAE and PNA regions, and the relative contributions of different oceanic basins are presented using histograms. The greatest increase in precipitation signal is observed in September during El Niño years in both regions, while in July and August the signal did not significantly increase.