Earlscliffe - Howth Weather

Pollen data © Google.

The pollen forecast uses the Google Pollen API which continuously assesses various pollen types and plant indices at a high resolution of 1 x 1 km² (0.6 x 0.6 mile²) across more than 65 countries. It provides forecasts up to five days ahead, covering three plant types (grasses, trees, and weeds) and 15 distinct species. The model incorporates inputs such as land cover, climatological data, and annual pollen production per plant to deliver accurate predictions of local pollen levels and potential exposure risks.

Universal Pollen Index (UPI)

Google categorises pollen levels using the the Universal Pollen Index (UPI) which shows daily pollen levels on a global scale, from 0 (none) to 5 (very high). It blends local pollen counts with plant allergen data to give a clear, easy-to-read measure of pollen risk.

Plant pollen forecast for Howth for the next 3 days

Plant details

Detailed information for the various plant species listed above and their potential for allergenic effect.

Plant description	Cross reactions	Photo plus Close-up (click image for detail)
PLANT: Alder TYPE: TREE FAMILY: Betulaceae (the Birch family) PLANT COLOUR: In the autumn, the leaves tend to turn brown. PLANT SHAPE: The trees grow catkins, which are clusters of flowers without petals. SEASON NOTES: Late winter, early spring	Birch, Hazel, Hornbeam, Beech, Willow and Oak pollen.
PLANT: Hazel TYPE: TREE FAMILY: Betulaceae (the Birch family) PLANT COLOUR: The catkins are yellow and red. PLANT SHAPE: The leaves are alternate, oval-shaped, often hairy. Hazel trees produce round nuts (hazelnuts). SEASON NOTES: Late winter, early spring	Alder, Birch, Hornbeam, Beech, Willow, and Oak pollen. In addition, there may be a higher risk for food allergies for hazelnuts.

Pollen data and heatmap © Google. Map data © OpenStreetMap contributors.

Other forecasts

Forecasts for other parts of Ireland can be found at these sites:

• Pollen.ie
• Met Éireann pollen forecasts (April to September)

Please note: Like all forms of forecasting, pollen forecasts are indicative, and conditions on the ground at a local level may differ significantly from those forecasted (especially on the coast). Therefore, never base important decisions on this or any weather information obtained from the Internet.

Pollen and the related seasons

Pollen is the male fertilising agent of flowering trees, grasses and weeds and is a major allergen that can result in symptoms of seasonal allergic rhinitis (hay fever) for some people. For those affected, different people react to different types of pollen and at differing levels, from mild irritation to a severe deterioration in those people's well-being. Therefore, an understanding of the level and types of pollen in your area can help those affected by pollen allergies to plan how they manage and cope with any symptoms and affects.

Most of the pollens that cause allergic reactions come from trees, grasses and weeds, each with different pollen seasons, and durations. Pollen seasons can start early in spring and can go on into the autumn months. The commencement of the seasons depends upon when the plant begins to go through the flowering process and can be measured by the level of airborne grains concentration per category and species.

The following chart gives the approximate pollen seasons for different trees, grasses and weeds, showing average peak periods. The timings and durations may vary locally, but this general understanding may help those people affected by pollen allergies to plan for the seasonal pollen types that effect them the most.

Further information

Further information can be found at these sites:

• HSE Hay Fever
• How to beat hay fever this summer

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