Mosquito season in Hidalgo County, TX: when it starts and ends
Mosquito months in Hidalgo County
In a normal year mosquito season in Hidalgo County, TX starts around January 3 and ends around January 1, about 52 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Hidalgo County, and when
- Start tipping out standing water weekly by December 20.
- Book any yard treatment for early January, ahead of the August peak.
- Repellent can go away after January 1.
- 25 West Nile cases since 2016: you should wear EPA-registered repellent at dusk April to October, and check TX spray notices.
Hidalgo County against the rest of TX
Hidalgo County has the 3rd longest season of 254 TX counties, at 363 days against 365 in Cameron County and 191 in Lipscomb County. Its mean temperature is 74.8°F.
- Cameron County: all year (365 days, 10 WNV)
- Galveston County: January 9 to January 8 (364 days, 15 WNV)
- Willacy County: January 7 to January 5 (363 days, 0 WNV)
- Zapata County: January 5 to January 1 (361 days, 0 WNV)
West Nile in Hidalgo County
From 1999 to 2025, CDC ArboNET counted 60 human West Nile cases in Hidalgo County (46 neuroinvasive) across 13 years. The worst was 2003 with 18; the latest was 2024.
Background: where mosquitoes never stop; how the dates are worked out.