Month-By-Month Pollen Allergy Guide

Ever wonder what the pollen is going to be like each month? The weather, location, and time of year determine which types of pollen are most prevalent. This quick guide can help you understand which months have the highest levels of pollen and help you plan ahead throughout the year.

Pollen Month-By-Month

January

Cedar is high in South but otherwise pollen is low across the US.

Trees	Grass	Weeds
Mild	Low	Low

February

Tree pollen, like alder and maple, is starting to creep up everywhere.

Trees	Grass	Weeds
Moderate	Low	Low

March

Tree pollen is dominant but weeds and grasses could start if Spring comes early.

Trees	Grass	Weeds
High	Mild	Low

April

This is the height of tree pollen like pine, mulberry and willow.

Trees	Grass	Weeds
Very High	Moderate	Mild

May

It’s a double whammy month with trees and grass being high everywhere.

Trees	Grass	Weeds
High	High	Mild

June

This is the height of grass pollen like bermuda, rye and cat.

Trees	Grass	Weeds
Moderate	Very High	Moderate

July

Just as we get some relief from tree pollen, weed pollen starts in earnest.

Trees	Grass	Weeds
Moderate	Very High	High

August

Weeds like pigweed, ragweed and nettle are in full effect.

Trees	Grass	Weeds
Mild	Moderate	High

September

The height of weed pollen - with pollen grains that spread easily in the wind.

Trees	Grass	Weeds
Mild	Mild	Very High

October

Weeds are still high in the south and west but otherwise the air is pretty clear.

Trees	Grass	Weeds
Low	Mild	High

November

It’s a good month for outdoor allergies and ragweed is finally ending.

Trees	Grass	Weeds
Low	Low	Mild

December

Outdoor allergies are at a low except that pesky Cedar Fever in the South.

Trees	Grass	Weeds
Mild	Low	Low

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