March in Irun averages a daily high of 16.6°C with nights around 8°C. Expect roughly 14.7 wet days totalling 131.8mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Irun is May–October.
Based on SAN SEBASTIAN FUENTERRABIA, SP (2.4km), 1995–2024. 21 years of March data.