What are the worst months for grass pollen?
Dave Leannon
2025-06-03 22:23:16
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Most people are allergic to grass pollen and the season lasts from mid-May until July. If we look at grass pollen, the peak across England and Wales, for example, usually starts in the first two weeks of June. There are two peaks though, with the second, lower peak occurring in the first two weeks of July, after which things tail off slowly. For grass, for example, a maximum temperature between 18 - 28 °C could give a high count if it’s a dry day with low humidity and a gentle breeze. However, if the temperature rises above 28 °C then all pollen levels decrease. Grass pollen occurs first, typically from mid-May until July, and affects around 25% of people.
Jay Lakin
2025-05-25 18:57:07
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May is a double whammy month with trees and grass releasing high levels of pollen everywhere.
Grass pollen is high in the South during the late spring and early summer, but the specific month is not mentioned, however, it is mentioned that June allergies are mainly caused by grass pollen like bermuda, rye and cat.
Trees: High Grass: High Weeds: Mild
Trees: Moderate Grass: Very High Weeds: Moderate
Grass: Very High
Grass: Moderate
Grass: Mild
Grass: Low
Grass: Low
Reggie Wiegand
2025-05-25 16:54:34
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: 12
From May until July grass pollen forms the bulk of the UK’s pollen load. Research suggests that with increasing temperatures, oak and grass pollen seasons may start even earlier, meaning that some allergy sufferers could begin to experience hay fever and other reactions as early as January/February. A changing climate will mean changes in temperature and rainfall may lengthen the UK pollen season and potentially make pollen concentrations higher. It’s possible that climate change will lead to changes in the potency of pollen – a single pollen particle can have varying amounts of the allergy causing agent on it. The pollen season in the UK has traditionally had 3 distinct but overlapping phases: From about March until May, the blossoming of trees such as hazel and birch creates the first wave of symptoms for some pollen allergy sufferers. Longer and more intense pollen seasons are something that we are beginning to experience in the UK.
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