Mosquito season in Erath County, TX: when it starts and ends
Mosquito months in Erath County
In a normal year mosquito season in Erath County, TX starts around March 15 and ends around November 17, about 35 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Erath County, and when
- Start tipping out standing water weekly by March 1.
- Book any yard treatment for mid March, ahead of the July peak.
- Repellent can go away after November 17.
- 2 West Nile cases since 2016 (last 2025): you should use repellent at dusk May to September, more so if over 60.
Erath County against the rest of TX
Erath County has the 185th longest season of 254 TX counties, at 247 days against 365 in Cameron County and 191 in Lipscomb County. Its mean temperature is 65°F.
- Callahan County: March 14 to November 16 (247 days, 2 WNV)
- Jack County: March 14 to November 16 (247 days, 0 WNV)
- Hall County: March 15 to November 17 (247 days, 1 WNV)
- Haskell County: March 15 to November 17 (247 days, 1 WNV)
West Nile in Erath County
From 1999 to 2025, CDC ArboNET counted 7 human West Nile cases in Erath County (4 neuroinvasive) across 6 years. The worst was 2003 with 2; the latest was 2025.
Background: when mosquitoes go away for the winter; how the dates are worked out.