Mosquito season in Hunterdon County, NJ: when it starts and ends
Mosquito months in Hunterdon County
In a normal year mosquito season in Hunterdon County, NJ starts around April 13 and ends around October 26, about 28 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Hunterdon County, and when
- Start tipping out standing water weekly by March 30.
- Book any yard treatment for mid April, ahead of the July peak.
- Repellent can go away after October 26.
- 6 West Nile cases since 2016 (last 2024): you should use repellent at dusk July to August, more so if over 60.
Hunterdon County against the rest of NJ
Hunterdon County has the 15th longest season of 21 NJ counties, at 195 days against 217 in Cape May County and 184 in Sussex County. Its mean temperature is 52.1°F.
- Essex County: April 11 to October 28 (199 days, 10 WNV)
- Ocean County: April 14 to October 29 (198 days, 9 WNV)
- Burlington County: April 15 to October 27 (195 days, 20 WNV)
- Somerset County: April 15 to October 26 (194 days, 9 WNV)
West Nile in Hunterdon County
From 1999 to 2025, CDC ArboNET counted 9 human West Nile cases in Hunterdon County (7 neuroinvasive) across 6 years. The worst was 2018 with 4; the latest was 2024.
Background: reading the West Nile counts; how the dates are worked out.