Pollen Count Fort Collins — What You Need to Know
The pollen count in Fort Collins peaks in April–September. High altitude compresses pollen seasons in mountain states, but counts can be intense during peak weeks.
Why Is Pollen High in Fort Collins?
The primary allergen is Mixed Trees — a mix of oak, maple, birch, and elm pollen peaks throughout spring. Pollen spikes on warm, dry, and windy days. Rain temporarily clears the air, but counts rebound fast.
Pollen Season in Fort Collins
- Tree pollen — starts in early spring, peaks April–May. Birch, oak, and cedar are the biggest triggers.
- Grass pollen — peaks late spring through early summer. Affects over 40 million Americans.
- Ragweed — August through October. One plant releases a billion grains per season.
Frequently Asked Questions
What is the pollen count in Fort Collins today?
The current pollen count in Fort Collins is updated every 12 hours using live data. Levels are rated Low, Moderate, High, or Very High based on pollen concentration in the air. Select the live badge above for today's reading.
What type of pollen is high in Fort Collins right now?
The primary allergen in Fort Collins is Mixed Trees. Peak pollen season in Fort Collins runs from April–September. The 'Active Allergens' section above shows which specific pollens are currently elevated.
When is pollen season in Fort Collins?
Pollen season in Fort Collins typically peaks in April–September. Tree pollen starts in early spring, followed by grass pollen in late spring through summer, and ragweed from August through October.
What should I do when pollen is high in Fort Collins?
On high pollen days in Fort Collins: check the forecast before going outside, schedule outdoor activities for the afternoon (pollen peaks 5–10 AM), keep windows closed and use AC, take antihistamines before exposure rather than after symptoms start, and shower after spending time outdoors to remove pollen from skin and hair.
How accurate is the pollen forecast for Fort Collins?
The pollen forecast for Fort Collins is based on the Google Pollen API, which combines real-time sensor data, weather forecasts, and plant biology models. Forecasts are updated every 12 hours and are generally accurate within 1 level (e.g., Moderate vs. High). Actual counts can vary by neighborhood depending on local vegetation.