Pollen Count in City of San Marino

4-Day Chart
Annual Overview

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City of San Marino has two main pollen seasons. Spring pollen season usually starts in March and lasts until May. Trees and flowers release pollen into the air.

Updated: 3/2/2026

During spring, oak, beech, and pine trees produce a lot of pollen. This makes the air feel funny. People notice yellow dust on cars and buildings.

Summer pollen season happens in July and August. Grasses and weeds produce pollen. This season can be just as bad as spring for some people.

In San Marino, pollen counts are usually lower in winter. However, some plants produce pollen year-round. This means some people might feel symptoms all year.

Pollen Forecast Chart

Recommendations

When pollen concentrations reach a peak, we suggest these simple steps to help with hay fever. These tips are extra important on windy days when plants are in peak anthesis (the time when they release the most pollen).

Wear masks if necessary
Shower after going out
Wear sunglasses if windy
Close windows and doors
Use an indoor air purifier
Avoid wearing woolen clothes outside
Limit outdoor activities

Annual Pollen Overview

Check out this month-by-month overview of the daily average pollen count in City of San Marino 🌾. This data is based on previous years and serves as a guideline to help you understand when different pollen seasons typically occur in your city.

	Alder	Birch	Grass	Mugwort	Olive	Ragweed
Jan	12.7	0	0	0	0	0
Feb	89.3	0	1.9	0	0	0
Mar	27.3	87.6	22.9	0	0.2	0
Apr	3.3	59.4	146.4	0	31.2	0
May	0.1	8.4	559.9	0	115.3	0
Jun	0	3.7	551.6	0	17	0
Jul	0	0.2	254.2	6.5	0.1	1.2
Aug	0	0	89.3	60.6	0	117.8
Sep	0	0	16	16.5	0	58.3
Oct	0	0	0.9	1.1	0	0
Nov	0	0	0.2	0	0	0
Dec	0	0	0	0	0	0

Nearby Places

Disclaimer * The pollen count information provided for City of San Marino is for educational purposes only, sourced from the CAMS European air quality database. We cannot guarantee its accuracy or reliability. This information is not a substitute for professional medical advice. Consult a qualified healthcare provider for medical concerns. We are not medical professionals.