Colma, California Pollen Count
Colma pollen count and allergy forecast — tree, grass, and ragweed seasons and what’s pollinating now
Colma, CA · Pollen count right now
Grass pollen is Very Low in Colma today
Grass: Very Low 1/5Tomorrow: Low
Today’s pollen by type
- TreeVery Low1/5
- GrassVery Low1/5
- Weed / RagweedOut of season
Colma pollen calendar
Typical peak months for each pollen type in this climate region. The highlighted column is the current month.
How Colma’s pollen count works
The calendar above is tuned to Colma’s mild Mediterranean California climate, not a national average: tree pollen peaks Jan–Apr, grass Mar–Jun, and ragweed Aug–Oct here. Those windows are why grass pollen is the one in season in Colma right now.
Right now grass pollen leads in Colma at a Very Low (1/5) level. The species actually in the air today: Pine, Oak, and Grasses. Counts run highest on warm, dry, windy mornings and drop after rain, which washes pollen out of the air — reported on the None / Low / Moderate / High / Very High scale.
Frequently asked
- When is pollen worst in Colma?
- Tree pollen jumps the gun in Colma, opening as early as Jan–Apr while colder regions are still dormant. Grass follows Mar–Jun and ragweed closes the year Aug–Oct. The early tree start is the trap — symptoms can begin before you expect them. Currently, grass pollen is what's driving counts this month.
- What's in the air in Colma right now?
- Right now grass pollen leads in Colma at a Very Low (1/5) level. The species actually in the air today: Pine, Oak, and Grasses. On a quiet live day, Colma's seasonal calendar fills in what's typically airborne this time of year.
- Is tree or grass pollen higher in Colma in spring?
- In spring, tree pollen leads in Colma — trees pollinate Jan–Apr, ahead of grass (Mar–Jun). The handoff is the tail of the tree window: tree counts taper as grass climbs, so an early-spring flare is more likely tree pollen and a late-spring one more likely grass.
- What makes Colma's pollen season distinctive?
- Colma sits in the mild Mediterranean California zone, which means an early start — mild winters pull tree pollen forward into late winter, ahead of a spring grass peak and a relatively contained ragweed fall. That shapes when symptoms hit and which allergen to watch.
- How do I reduce pollen exposure in Colma?
- Through Colma's peak windows (tree Jan–Apr, grass Mar–Jun, ragweed Aug–Oct), keep windows shut and run AC on recirculate; counts run highest on dry, warm, windy mornings, so push outdoor activity to late afternoon or just after rain, which clears pollen from the air. A HEPA purifier indoors, a saline rinse after being outside, showering before bed, and starting antihistamines a week or two before your worst local window all measurably cut symptoms.
- What pollen index counts as high?
- Pollen is reported on a categorical scale — None, Low, Moderate, High, and Very High. "High" and above means most allergy sufferers notice symptoms even with brief outdoor exposure, and sensitized people should limit time outside and pre-medicate. "Low" to "Moderate" usually only affects highly sensitive individuals.
More for Colma
See the full Colma, CA weather forecast — hour-by-hour outlook, NOAA radar, satellite, and air quality.