Japan Meteorological Agency observations confirm Tokyo's highest temperature on March 25 reached exactly 13°C, primarily at central stations like Chiyoda, driving trader consensus to 100% on this outcome as the market reflects verified daily maximum data. This aligns with cool spring conditions influenced by lingering cold air masses from the Asian continent and weak southerly winds, consistent with seasonal norms where March highs average 12–15°C amid variable frontal systems. Ensemble forecast models from leading agencies had converged on this range days prior, minimizing uncertainty. Realistic challenges would require a post-verification data revision due to rare instrument malfunction or station-specific anomalies, though JMA's rigorous quality controls make this improbable; resolution awaits final official report.