Current pollen levels in France’s larger cities. The pollen season in France runs from February to September: hazel and alder first, birch and oak in spring, grass in summer, mugwort in late autumn.
About pollen monitoring
French Museum of Natural History — official French pollen monitoring
Pollen levels are compiled by the Palynology Laboratory at the French Museum of Natural History (official French pollen monitoring). The values show the maximum concentration per cubic metre of air, categorised as Low (<10), Moderate (10-49), High (50-99) or Very high (≥100).