Pollen Forecast for St Catharines, Ontario, CA

The quantity of pollen grains in the air for Tuesday will be increasing over today's levels but will stay in the very low range. This forecast of higher pollen concentration is based on higher temperatures and windy conditions.

The amount of pollen in the air for Wednesday will be falling and will remain in the very low range. Since the weather has a major influence on pollen dispersal, this decrease is due in part to rising humidity, weakening winds and expected precipitation in the morning and afternoon which tends to wash pollen out of the air.