If you think hay fever ends on a specific date, think again. It’s more like a relay race between different plants. Tree pollen starts the race in early spring, then hands the baton to grasses in late spring and summer. By late summer, weed pollen takes over, and the finish line can blur well into autumn.
For most people in the US and UK, the main hay fever season peaks between March and September. But here’s the kicker: it doesn’t just stop everywhere at once. A rainy July might delay grass pollen, while a warm September can keep ragweed going longer. So, your nose might get a second wind when you least expect it.
The “When” Depends on Where You Live
Your location dramatically changes the answer. If you’re in the northern US or Scotland, your season might wrap up by early September. Down in the southern states or Mediterranean climates, ragweed can party until October or November. Ever felt jealous of someone whose hay fever ends in August? That’s geography being a jerk.
Even within the same country, neighbor towns can differ. A city with lots of birch trees will have a different schedule than a rural area full of grass fields. It’s like a local weather forecast, but for your sinuses. Cool, right? Well, at least it’s interesting.
