Abstract While most of Africa’s burned area occurs during the dry season, the relationship between dry season characteristics and fire activity remains poorly understood. This study demonstrates a significant decrease in the length of the African dry season over 1990–2023, primarily contributed by delayed dry season onset in both the Northern (NH) and Southern (SH) Hemispheres (1.75 and 0.40 days·decade−1, respectively). This delay is associated with increased early dry season precipitation, which can explain a notable reduction in burned area from 2003 to 2022, especially during the peak fire seasons (NH: −1.40 Mha·month−1 yr−1 in December; SH: −0.48 Mha·month−1 yr−1 in August). Increased early dry season precipitation across Africa shows the strongest association with fire dynamics and results in significant negative correlations with burned area and fire counts (r = −0.74 to −0.80, respectively). These findings provide vital insights for developing fire management strategies in the context of shifting rainfall seasonality.