Tick Season by Month: When Are Ticks Most Active?

Ticks aren't equally active all year — knowing when they peak helps you time your prevention. Here's the seasonal picture for most of the U.S.

The short answer

For most regions, ticks are most active from spring through early fall, with peak activity typically May through August. In warmer southern states they can be active nearly year-round, and mild spells in spring or fall can wake them early or keep them out late.

Month by month

• March–April: Ticks emerge as temperatures rise; adult ticks become active.
• May–June: Peak risk. Blacklegged (deer) tick nymphs are active and, being poppy-seed small, are easy to miss.
• July–August: Continued high activity, especially in humid, brushy areas.
• September–October: A second bump as adult ticks become active again.
• Winter: Activity drops in cold regions but doesn't fully vanish; a thaw can bring ticks out.

Why season length varies

Climate and region drive the differences. Warmer, more humid areas support longer tick seasons, and reports in recent years point to seasons stretching earlier and later than they used to. The practical takeaway: don't assume you're safe just because it's early spring or late fall.

When to ramp up prevention

Treat any outing in grassy, brushy, or wooded areas between spring and fall as tick territory. That's the window to be consistent with the basics — clothing, repellents, and tick checks. See our prevention guide, and keep a drug-free layer like Roam Repel clipped on through the season.

This article is for general information and isn't medical advice.

Source: CDC — Ticks