Pollen calendars show when it is the season for the most important pollens in relation to pollen allergy.
The season may vary for different countries. Within a country it may vary from year to year. The rest of this page contains links to national pollen calendars and/or pollen counts.
On this page you can find information about pollen for 35 countries in Europe. You can also find links to the individual countries own pages about pollen.
There are 70 certified pollen-counting stations spread across USA. You can find pollen counts for 5 regions that are subdivided into many localities.
You can find pollen counts and calendars for many cities in the 10 regions.