In sub-Saharan Africa, children continue to suffer immense welfare deprivation. We examine the effect of the poverty–weather shock nexus on children’s growth deprivation using the Uganda National Panel Survey and a rich spatial rainfall data. Our results show that poverty and weather shocks significantly reduce children’s height-for-age and weight-for-age score. Interestingly, the results also show that the initial reduction of children’s height-for-age is almost cancelled with a prolonged lag after the shock. These results provide a strong basis to deliver social assistance to avert children’s growth deprivation when exposed to negative rainfall shocks.