Mosquito season in Garrett County, MD: when it starts and ends
Mosquito months in Garrett County
In a normal year mosquito season in Garrett County, MD starts around April 24 and ends around October 16, about 25 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Garrett County, and when
- Start tipping out standing water weekly by April 10.
- Book any yard treatment for late April, ahead of the July peak.
- Repellent can go away after October 16.
- No West Nile cases since 2016, so bites in Garrett County are a nuisance; check window screens.
Garrett County against the rest of MD
Garrett County has the 24th longest season of 24 MD counties, at 175 days against 235 in Wicomico County and 175 in Garrett County. Its mean temperature is 48.3°F.
- Allegany County: April 6 to October 28 (205 days, 0 WNV)
- Carroll County: April 9 to October 29 (203 days, 4 WNV)
West Nile in Garrett County
CDC ArboNET lists no human West Nile cases for Garrett County from 1999 to 2025, though virus turned up in birds, mosquitoes or horses in 2 of those years.
More: how the dates are worked out · when mosquitoes go away for the winter.