Mosquito season in El Paso County, TX: when it starts and ends
Mosquito months in El Paso County
In a normal year mosquito season in El Paso County, TX starts around February 16 and ends around November 30, about 41 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in El Paso County, and when
- Start tipping out standing water weekly by February 2.
- Book any yard treatment for mid February, ahead of the July peak.
- Repellent can go away after November 30.
- 89 West Nile cases since 2016: you should wear EPA-registered repellent at dusk May to September, and check TX spray notices.
El Paso County against the rest of TX
El Paso County has the 72nd longest season of 254 TX counties, at 287 days against 365 in Cameron County and 191 in Lipscomb County. Its mean temperature is 65.8°F.
- Dimmit County: February 20 to December 5 (288 days, 1 WNV)
- Navarro County: February 22 to December 7 (288 days, 10 WNV)
- Grimes County: February 19 to December 3 (287 days, 6 WNV)
- Cherokee County: February 23 to December 7 (287 days, 3 WNV)
West Nile in El Paso County
From 1999 to 2025, CDC ArboNET counted 371 human West Nile cases in El Paso County (300 neuroinvasive) across 23 years. The worst was 2007 with 37; the latest was 2025.
More: how the dates are worked out · reading the West Nile counts.