Vallejo pollen forecast - today, tomorrow and the week ahead

Currently, there is no significant pollen in Vallejo.

On 17 July 2026, pollen conditions in Vallejo will be similar to today with no significant pollen expected.

According to the five-day outlook, ambrosia, artemisia, cypress, and grass pollen levels will increase later in the week.

On 16 July 2026, there are no significant pollen types in Vallejo.

Vallejo's pollen season opens with acacia and tree pollen from January in the mild North Bay climate. Oak follows through March and April, with grass peaking through April and May. The Carquinez Strait channels prevailing westerly winds and marine air that can periodically moderate pollen levels, while surrounding North Bay hills and the San Pablo Bay shoreline contribute substantial grass and tree pollen under offshore conditions.

The Vallejo pollen forecast is updated four times daily. See the timestamp below for the most recent update.

Studies show that most pollen exposure (often 70–90%) comes from nearby sources, such as local trees and vegetation. A good pollen forecast therefore depends on accurately representing local vegetation. Pollen can travel long distances, but this usually matters only early in the season or during specific wind events.

Pollen data is often misunderstood. Most "pollen levels" are not real-time measurements, but forecasts.

Direct pollen measurements are typically delayed by 1-2 days because they require manual analysis. To show current conditions in Vallejo, modern forecasts combine recent measurements, weather data, and information about local vegetation.

This allows us to estimate pollen levels for today and the coming days, not just report the past.

Airmine’s atmospheric monitoring platform was developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team, using satellite and Earth observation technologies to improve emissions monitoring.