Mosquito season in Coryell County, TX: when it starts and ends
Mosquito months in Coryell County
In a normal year mosquito season in Coryell County, TX starts around March 5 and ends around November 20, about 37 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Coryell County, and when
- Start tipping out standing water weekly by February 19.
- Book any yard treatment for early March, ahead of the August peak.
- Repellent can go away after November 20.
- No West Nile cases since 2016, so bites in Coryell County are a nuisance; check window screens.
Coryell County against the rest of TX
Coryell County has the 148th longest season of 254 TX counties, at 260 days against 365 in Cameron County and 191 in Lipscomb County. Its mean temperature is 66.4°F.
- Blanco County: March 6 to November 22 (261 days, 1 WNV)
- Tom Green County: March 6 to November 22 (261 days, 5 WNV)
- Brown County: March 7 to November 21 (259 days, 2 WNV)
- Ector County: March 7 to November 21 (259 days, 7 WNV)
West Nile in Coryell County
From 1999 to 2025, CDC ArboNET counted 2 human West Nile cases in Coryell County (2 neuroinvasive) across 2 years. The worst was 2012 with 1; the latest was 2012.
Background: when mosquitoes go away for the winter; how the dates are worked out.