Welcome on hayfever This website is all about weatherconditions, hayfever, forecasting, mapmaking and airborn pollen.


Hayfever complains

This graph is an example of hayfever-like complains (“hayfever-like”, because not everyone is for 100% sure if a runny nose, or itching eyes, are caused by pollen). This feedback is generated by pollennieuws apps and websites and is very helpfull updating the prediction model. You can see that there are big differences between days. The flowering period of allergenic trees, grasses and herbs is very important. The local weatherconditions have a big influence on the amount of airborn pollen. You can find more of this type of graphics on

Hayfever causing grass pollen

This graphic is an example of grass pollencounts during june over the period 2013, 2014, 2015 and 2016. You can see there are big differences between individual days, but also between years. It realy depends on the weather when specific trees, grasses or herbs are releasing their pollen.

Pollencounting by hour

This graph is an example of pollenconcentration during three different types of days. Day 1 shows airborn pollen between 9:00 and 17:00. Day 2 shows a pollenpeak during the early morning hours. Day 3 shows a peak in the evening. Weatherconditions, like a rainshower, a sunny or cloudy day, have big influence on the hourly pollenconcentration. Check the latest posts on pollencounting >>


Check the latest posts on weatherconditions >>

registering weatherdata is the key to modeling

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