Mosquito season in Hudson County, NJ: when it starts and ends
Mosquito months in Hudson County
In a normal year mosquito season in Hudson County, NJ starts around April 7 and ends around November 5, about 30 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Hudson County, and when
- Start tipping out standing water weekly by March 24.
- Book any yard treatment for early April, ahead of the July peak.
- Repellent can go away after November 5.
- 6 West Nile cases since 2016 (last 2025): you should use repellent at dusk June to August, more so if over 60.
Hudson County against the rest of NJ
Hudson County has the 4th longest season of 21 NJ counties, at 212 days against 217 in Cape May County and 184 in Sussex County. Its mean temperature is 55.1°F.
- Salem County: April 4 to November 5 (215 days, 1 WNV)
- Atlantic County: April 7 to November 6 (213 days, 8 WNV)
- Camden County: April 6 to November 3 (211 days, 22 WNV)
- Gloucester County: April 7 to November 3 (211 days, 6 WNV)
West Nile in Hudson County
From 1999 to 2025, CDC ArboNET counted 20 human West Nile cases in Hudson County (17 neuroinvasive) across 13 years. The worst was 2018 with 4; the latest was 2025.
Background: reading the West Nile counts; how the dates are worked out.