Poverty is typically measured as insufficient yearly income or consumption. In practice, however, poverty is marked by seasonality, economic instability, and illiquidity across months. To capture within-year variability, we extend traditional poverty measures to include a temporal dimension. Using panel data from rural India, we show how conventional poverty measures can distort understandings of poverty: exposure to poverty is wider and more common than typically measured, and poverty entry and exit are not sharp transitions. Accounting for within-year variability improves predictions of anthropometrics, and targeting transfers to challenging periods can reduce poverty most effectively by compensating for imperfect consumption smoothing.