How this works

A fast, honest answer to whether mosquitoes are active where you are — derived from real weather conditions, not a calendar.

The activity model

Mosquito activity isn't a fixed date on the calendar — it's driven by weather. This site uses current and forecast weather data from Open-Meteo (free, public, no tracking) and runs it through a simple activity model based on entomological research:

• Temperature is the primary factor. Most species become active above 50°F, with peak activity between 70–90°F. Extreme heat (above 95°F) reduces adult activity.
• Humidity amplifies activity. High humidity (above 75%) keeps mosquitoes more active; very dry air suppresses them.
• Wind is a natural suppressant. Mosquitoes are weak fliers — sustained winds above 15–20 mph significantly reduce biting pressure.
• Recent rainfall creates standing water, which is the primary breeding medium. Activity may rise a few days after significant rainfall as new adults emerge.

The model outputs an activity level from 0 (none) to 5 (very high) and a YES or NO answer to the title question. Activity level 2 (Low) and above is considered "season."

Data sources

Weather data comes from Open-Meteo, an open-source weather API that aggregates forecasts from NOAA, ECMWF, and other global models. It provides current conditions (temperature, humidity, precipitation, wind) and a 6-day forecast at no cost and with no tracking.

Species biology and disease risk information is drawn from CDC Mosquitoes and published entomological literature. Disease information on the site is for general awareness only and is not medical advice.

Location is obtained via your browser's Geolocation API and used only to fetch weather data. It is never stored, logged, or shared.

Who built this

This site is part of a small network of seasonal condition trackers built to give people fast, honest answers about what's actually happening outside. The allergy counterpart lives at isitallergyseasonyet.com.

If something looks wrong, or you have a question about how the model works, use the contact page.

Affiliate disclosure

Some links on this site — particularly product recommendations in the activity section — are Amazon affiliate links. If you purchase through one of these links, we may earn a small commission at no additional cost to you. Recommendations are based on documented effectiveness, not compensation.