Cedar Fever Season 2025-2026: What Happened
The 2025-2026 cedar fever season followed the characteristic Texas pattern — mountain cedar (Ashe juniper) began releasing pollen in December following the first significant cold fronts of winter, peaked during January, and began declining through February as oak began its seasonal ascent. The season arrived on schedule with historical averages for the Central Texas region.
January 2026 brought multiple significant northwest wind events following cold front passages across the Hill Country — the most reliable trigger for extreme cedar pollen events in Austin and San Antonio. During these events, counts in Central Texas reached extreme levels, prompting the usual January surge of cedar fever patients at urgent care centers across Austin, San Antonio, and Waco.
The Cedar Fever Calendar — How It Works Each Year
November: The Calm Before
November is Texas's best allergy month. Ragweed finished with the first frost in October. Cedar hasn't yet begun. For cedar-sensitized Texans, November is the single best month of the year for outdoor activities, travel planning, and anything requiring sustained outdoor time.
December: Season Begins
Mountain cedar begins pollinating after sufficient cold exposure. In the Hill Country, December events are often the first warning shots — not yet peak intensity but enough to produce symptoms in highly sensitized individuals. Cedar begins earlier in San Antonio (closer to the Hill Country) and Austin than in DFW, which requires wind transport from the south and west.
January: Peak Events
The worst of cedar fever. Northwest cold front passages deliver Hill Country cedar pollen in concentrated events that can push counts above 20,000 grains/m³ on peak days in Austin. The two to three worst cedar days of any year typically occur in January. These events are what makes January the month that sends thousands of Texans to urgent care convinced they have the flu.
February-March: The Handoff
Cedar declines through February but doesn't disappear. Oak begins its seasonal ascent in March. The overlap period — when cedar is still elevated and oak is rising — can produce a particularly difficult 2-3 week window in late February through mid-March where multiple major tree allergens are simultaneously elevated. This is the Texas "allergy handoff" that no other region experiences at the same intensity.
Tracking Cedar Counts in Real Time
Cedar fever management depends heavily on real-time pollen data. Unlike seasonal allergy planning that can be done on weekly timescales, cedar fever events can go from low counts to extreme in 24 hours when a northwest cold front passes. The forecast the evening before a front passage is the most critical data point for cedar management — it tells you whether tomorrow requires maximum indoor precautions or is a manageable day.
Cedar Fever vs Flu — The Misdiagnosis Pattern in 2026
Texas urgent care centers and emergency rooms see a reliable influx of cedar fever patients every January — people convinced they have influenza because their symptoms are so severe. The 2026 season was no different. The distinguishing facts remain unchanged year over year: cedar fever produces no fever, no body aches, no muscle pain. If you have these symptoms alongside the nasal misery, get an influenza or COVID test. If your temperature is normal and your primary symptoms are nasal — that's cedar fever, and you need antihistamines and HEPA filtration, not antibiotics or antivirals.
What to Expect for the Rest of the Season
By May 2026, cedar fever season is definitively over — cedar's bloom cycle completes in March and doesn't restart until December. If you're in the post-cedar window reading this, your next cedar season begins in December 2026. The management steps worth taking now: schedule an allergist appointment in fall if cedar symptoms were severe this year; consider whether immunotherapy is appropriate; and set a reminder to begin pre-season HEPA filter replacement and antihistamine discussion with your doctor in November before the next season begins.
Track cedar pollen next season from day one.
Anthos alerts you when cedar begins in your Texas location — so you're not caught off guard when the first December front arrives.
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Anthos provides general wellness information only. Nothing in this article constitutes medical advice, diagnosis, or treatment. Always consult a licensed healthcare professional before making health decisions.