El Niño and La Niña affect the weather in large parts of the world. The effects depend strongly on the location and the season. We have studied the CRU TS 3.22 analyses of 2-meter temperature over land. As a measure of the strength of the relationship we used the correlation coefficient with the Niño3.4 index. The square of this number gives the fraction of the variance that is explained by this aspect of El Niño and La Niña.