Mosquito season in Navarro County, TX: when it starts and ends
Mosquito months in Navarro County
In a normal year mosquito season in Navarro County, TX starts around February 22 and ends around December 7, about 41 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Navarro County, and when
- Start tipping out standing water weekly by February 8.
- Book any yard treatment for late February, ahead of the August peak.
- Repellent can go away after December 7.
- 10 West Nile cases since 2016: you should wear EPA-registered repellent at dusk May to September, and check TX spray notices.
Navarro County against the rest of TX
Navarro County has the 71st longest season of 254 TX counties, at 288 days against 365 in Cameron County and 191 in Lipscomb County. Its mean temperature is 66.4°F.
- San Jacinto County: February 17 to December 4 (290 days, 0 WNV)
- Dimmit County: February 20 to December 5 (288 days, 1 WNV)
- El Paso County: February 16 to November 30 (287 days, 89 WNV)
- Grimes County: February 19 to December 3 (287 days, 6 WNV)
West Nile in Navarro County
From 1999 to 2025, CDC ArboNET counted 24 human West Nile cases in Navarro County (15 neuroinvasive) across 9 years. The worst was 2012 with 8; the latest was 2025.
Background: reading the West Nile counts; how the dates are worked out.