Flu season has a forecast.
Flu spreads more when the air is cold and dry. It also spreads when people spend more time inside together.
Disease Weather shows flu where you live, next to the weather that helps it spread.
Watch for cold snaps and dry days.
Disease Weather reads reports of flu-like illness from doctor visits, plus CDC wastewater and ER visit data. Your area page shows the date of the newest data.
US Flu Trends · hospital admissions, week by week
people were admitted to US hospitals with confirmed flu in one week
That's the whole country. Check your area's flu activity at DiseaseWeather.com.
Disease Weather+ is coming
It adds your watch or ring to the picture, so the forecast fits you. Join the list and we will email you when it opens.
What else fall brings
Flu is the big one. Four more things change when the weather turns. Tap one to read more.
In your area, each score shows one of four levels:
- Low
- Medium
- High
- Very high
Colds, RSV and COVID
These spread the same way flu does. More time inside means more shared air.
Watch for the weeks when school and work crowds move indoors.
Disease Weather reads reports of flu-like illness from doctor visits, plus CDC wastewater and ER visit data. Your area page shows the date of the newest data.
Allergies move indoors
Ragweed fades after the first frost. Wet leaves on the ground grow mold. Closed windows keep dust and mold inside.
Watch for damp days and the first time the heat comes on.
Disease Weather uses pollen counts and weather data. Your area page shows the date of the newest data.
Mosquitoes until the first hard frost
Mosquitoes still bite on warm fall days. Some carry West Nile virus or EEE. The risk drops after a hard frost.
Watch for warm evenings before the frost.
Shown as reported by state health departments. Disease Weather does not score it yet.
Indoor air
Closed windows trap what is in the air. Heating also dries the air out.
Watch for days with clean outdoor air. Those are good days to let fresh air in.
Disease Weather uses outdoor air and weather data for your area.
See it where you live
Share your location or search for your town. It takes a few seconds.
Play Achoo!
Team up with DW1, a small robot on a clean-air mission. Clear the dust, dodge the germs and pick up simple tips for the season.
Free. Plays in your browser. Nothing to download.
Play Achoo!Achoo comes back each season. Check in when the weather changes.