Allergies & Pollen Count for Foggy Bottom, Washington, D.C.

Today's Condition

8.9Medium-High

Top Allergens:

Ragweed, Chenopods, Nettle

Pollen Index

9.7 - 12 - High

Very high pollen levels. Symptoms are likely for most people with pollen allergies.

7.3 - 9.6 - Medium - High

High enough pollen levels that most allergy sufferers will notice symptoms.

4.9 - 7.2 - Medium

Moderate pollen levels. Many people with allergies may start experiencing symptoms.

2.5 - 4.8 - Low - Medium

Small amounts of pollen present. Highly sensitive individuals may notice mild symptoms.

0.0 - 2.4 - Low

Very little pollen in the air. Most people with pollen allergies will not experience symptoms.

Discussion

The quantity of pollen grains in the air for Friday will be falling but will remain in the high range. Since the weather has a major influence on pollen dispersal, this decrease is due in part to falling temperatures, rising humidity, and expected precipitation in the evening which tends to wash pollen out of the air.

Allergy Facts

Giant ragweed requires rich, moist soils for growth and is rarely found in areas where low rainfall is common. Unfortunately, arid regions support different species of ragweed, such as Ambrosia dumosa (bursage), which makes dry regions just as miserable for allergy sufferers as wetter climatic zones.