Mosquito season in Greater Bridgeport Planning Region, CT: when it starts and ends
Mosquito months in Greater Bridgeport Planning Region
In a normal year mosquito season in Greater Bridgeport Planning Region, CT starts around April 16 and ends around November 2, about 29 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Greater Bridgeport Planning Region, and when
- Start tipping out standing water weekly by April 2.
- Book any yard treatment for mid April, ahead of the July peak.
- Repellent can go away after November 2.
- 2 West Nile cases since 2016 (last 2025): you should use repellent at dusk July to August, more so if over 60.
Greater Bridgeport Planning Region against the rest of CT
Greater Bridgeport Planning Region has the 1st longest season of 9 CT counties, at 200 days against 200 in Greater Bridgeport Planning Region and 164 in Northwest Hills Planning Region. Its mean temperature is 53.1°F.
- Capitol Planning Region: April 16 to October 25 (193 days, 5 WNV)
- Southeastern Connecticut Planning Region: April 18 to October 28 (193 days, 2 WNV)
West Nile in Greater Bridgeport Planning Region
From 1999 to 2025, CDC ArboNET counted 2 human West Nile cases in Greater Bridgeport Planning Region (2 neuroinvasive) across 2 years. The worst was 2025 with 1; the latest was 2025.
More: how the dates are worked out · when mosquitoes go away for the winter.