Ohio mosquito forecast, by town

A daily mosquito bite-risk score for all 925 Ohio towns, grouped by their 88 counties. Mosquito pressure is local, so pick your town for today's number, a 7-day outlook, and what's driving it.

Adams County · 6 towns

Allen County · 9 towns

Ashland County · 9 towns

Ashtabula County · 10 towns

Athens County · 10 towns

Auglaize County · 8 towns

Belmont County · 13 towns

Brown County · 9 towns

Butler County · 10 towns

Carroll County · 5 towns

Champaign County · 7 towns

Clark County · 9 towns

Clermont County · 10 towns

Clinton County · 8 towns

Columbiana County · 13 towns

Coshocton County · 6 towns

Crawford County · 7 towns

Cuyahoga County · 57 towns

Darke County · 19 towns

Defiance County · 4 towns

Delaware County · 7 towns

Erie County · 7 towns

Fairfield County · 14 towns

Fayette County · 5 towns

Franklin County · 24 towns

Fulton County · 7 towns

Gallia County · 6 towns

Geauga County · 5 towns

Greene County · 10 towns

Guernsey County · 9 towns

Hamilton County · 36 towns

Hancock County · 11 towns

Hardin County · 9 towns

Harrison County · 9 towns

Henry County · 9 towns

Highland County · 7 towns

Hocking County · 3 towns

Holmes County · 5 towns

Huron County · 7 towns

Jackson County · 4 towns

Jefferson County · 18 towns

Knox County · 7 towns

Lake County · 18 towns

Lawrence County · 7 towns

Licking County · 14 towns

Logan County · 12 towns

Lorain County · 16 towns

Lucas County · 10 towns

Madison County · 6 towns

Mahoning County · 10 towns

Marion County · 8 towns

Medina County · 9 towns

Meigs County · 5 towns

Mercer County · 9 towns

Miami County · 12 towns

Monroe County · 10 towns

Montgomery County · 19 towns

Morgan County · 4 towns

Morrow County · 7 towns

Muskingum County · 9 towns

Noble County · 6 towns

Ottawa County · 8 towns

Paulding County · 10 towns

Perry County · 11 towns

Pickaway County · 8 towns

Pike County · 3 towns

Portage County · 9 towns

Preble County · 11 towns

Putnam County · 15 towns

Richland County · 9 towns

Ross County · 7 towns

Sandusky County · 8 towns

Scioto County · 5 towns

Seneca County · 8 towns

Shelby County · 9 towns

Stark County · 18 towns

Summit County · 22 towns

Trumbull County · 11 towns

Tuscarawas County · 19 towns

Union County · 5 towns

Van Wert County · 9 towns

Vinton County · 4 towns

Warren County · 13 towns

Washington County · 7 towns

Wayne County · 15 towns

Williams County · 9 towns

Wood County · 25 towns

Wyandot County · 8 towns

Ohio mosquito questions

What kinds of mosquitoes live in Ohio?
Ohio has floodwater mosquitoes (the dominant summer nuisance biter, which surges after heavy rain), the Asian tiger mosquito (a daytime biter that breeds in yard containers), the house mosquito (the main West Nile carrier), and swamp and cattail-marsh mosquitoes tied to the EEE cycle. Which ones dominate a given town depends on its local breeding habitat.
When does mosquito season start and end in Ohio?
In Ohio, mosquito numbers build from about mid-June, peak in mid-to-late summer, and fade with the first cool nights of fall. Biting largely stops once temperatures drop below about 50°F, and a hard freeze ends the season.
Is West Nile or EEE a risk in Ohio?
Both West Nile virus and Eastern equine encephalitis occur in the region, but human cases are rare. West Nile risk peaks in late-summer heat and tracks the house mosquito in developed areas; EEE rises after mid-July in swampy areas. For confirmed local activity, check the Ohio health department's arbovirus surveillance.
How do I keep mosquitoes out of my yard in Ohio?
The single biggest thing you control is standing water: empty anything that holds it, keep gutters clear, and change bird baths weekly. Use EPA-registered repellent at dawn and dusk, and for heavy biting a licensed mosquito-control service can treat breeding sites and resting spots you can't reach.