Isfahan features a cold desert climate (Köppen climate classification *BWk*), characterized by distinct seasons, low precipitation, and high diurnal temperature variations.
Summers (June to August) are generally hot and arid, with average daytime highs around 35°C to 37°C (95°F to 98°F), though low humidity makes the heat more manageable. Winters (December to February) are chilly, with nighttime temperatures frequently dropping below freezing (around -2°C to 0°C / 28°F to 32°F) and daytime highs around 8°C to 12°C (46°F to 54°F). Snowfall occurs occasionally but rarely accumulates deeply. Annual precipitation is sparse, averaging around 110 to 120 mm (4.5 inches), primarily falling between December and April. The best times to visit are during the mild spring (April and May) and autumn (September and October).