What kinds of mosquitoes live in Maryland?

Maryland 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 Maryland?

In Maryland, 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 Maryland?

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 Maryland health department's arbovirus surveillance.

How do I keep mosquitoes out of my yard in Maryland?

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.

Maryland mosquito forecast, by town

A daily mosquito bite-risk score for all 384 Maryland towns, grouped by their 24 counties. Mosquito pressure is local, so pick your town for today's number, a 7-day outlook, and what's driving it.

Allegany County · 11 towns

Anne Arundel County · 29 towns

Baltimore County · 32 towns

Baltimore city County · 1 towns

Baltimore

Calvert County · 11 towns

Caroline County · 9 towns

Carroll County · 9 towns

Cecil County · 8 towns

Charles County · 8 towns

Dorchester County · 10 towns

Frederick County · 23 towns

Garrett County · 8 towns

Harford County · 14 towns

Howard County · 9 towns

Kent County · 5 towns

Montgomery County · 59 towns

Prince George's County · 80 towns

Queen Anne's County · 12 towns

Somerset County · 2 towns

St. Mary's County · 8 towns

Talbot County · 4 towns

Washington County · 18 towns

Wicomico County · 8 towns

Worcester County · 6 towns

Maryland mosquito questions

What kinds of mosquitoes live in Maryland?: Maryland 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 Maryland?: In Maryland, 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 Maryland?: 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 Maryland health department's arbovirus surveillance.
How do I keep mosquitoes out of my yard in Maryland?: 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.