Pollen forecast by city › San Antonio
Pollen forecast for San Antonio today
Pollen levels in San Antonio today by trees, grasses and weeds, the forecast for the coming days, and when each plant’s pollen season usually starts and peaks.
San Antonio lies in live oak and Ashe juniper country on the edge of the Hill Country, so winter cedar fever is part of local life. According to Texas A&M, Ashe juniper, locally called mountain cedar, starts releasing pollen in mid-December, peaks in mid-January and tapers off towards the beginning of March. A separate station certified by the National Allergy Bureau measures daily pollen counts in San Antonio; the levels and calendar on this page are model-based estimates, not those measurements. Exact timing depends on the weather each year.
Pollen today
- Trees2 · low
- Grasses3 · moderate
- Weeds4 · high
- Ragweed4 · high
- Elm2 · low
Data updated Mon, 12 Oct, 00:06, local time.
Pollen forecast for the next days
| Day | Overall | Trees | Grasses | Weeds | Elm | Ragweed |
|---|---|---|---|---|---|---|
| Tomorrow, Tue, 13 Oct | Overall4 · high | Trees2 · low | Grasses3 · moderate | Weeds4 · high | Elm2 · low | Ragweed4 · high |
| Wed, 14 Oct | Overall4 · high | Trees2 · low | Grasses2 · low | Weeds4 · high | Elm2 · low | Ragweed4 · high |
| Thu, 15 Oct | Overall4 · high | Trees2 · low | Grasses3 · moderate | Weeds4 · high | Elm2 · low | Ragweed4 · high |
| Fri, 16 Oct | Overall4 · high | Trees2 · low | Grasses3 · moderate | Weeds4 · high | Elm2 · low | Ragweed4 · high |
In bloom now
- Ragweedhigh
- Elmlow
Pollen season calendar for San Antonio
When pollen of each plant is usually in the air in San Antonio, month by month. The calendar is an estimate for a typical year; the actual start shifts with the weather by a week or two.
| Plant | January | February | March | April | May | June | July | August | September | October | November | December |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Juniper (mountain cedar)season Dec – Feb, peak Jan | ||||||||||||
| Alderseason Jan – Mar, peak Feb – Mar | ||||||||||||
| Mapleseason Jan – Mar, peak Feb – Mar | ||||||||||||
| Birchseason Feb – Apr, peak Mar – Apr | ||||||||||||
| Ashseason Feb – Apr, peak Mar – Apr | ||||||||||||
| Cottonwoodseason Mar – May, peak Mar – Apr | ||||||||||||
| Oakseason Mar – May, peak Apr | ||||||||||||
| Pineseason Mar – May, peak Apr – May | ||||||||||||
| Grassesseason Apr – Aug, peak May – Jul | ||||||||||||
| Ragweedseason Aug – Oct, peak Sep – Oct | ||||||||||||
| Elmseason Aug – Oct, peak Sep – Oct |
On high-pollen days
- Pollen levels are usually highest on warm, dry and windy days; rain washes pollen out of the air for a while.
- Keep windows closed when the level is high and air rooms after rain.
- After a long time outdoors, change clothes and wash your hair; dry laundry indoors.
- Sunglasses help keep pollen out of your eyes.
- If you have allergy symptoms, talk to a doctor — this page does not replace medical advice.
About the data
Current levels and the forecast come from the Google Pollen API. It is a model forecast on the Universal Pollen Index (0–5), not a measurement from a local pollen trap. The season calendar is AllergoRadar’s estimate based on model data and published pollen calendars. Reference information only, not medical advice.
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