Mosquito season in Randall County, TX: when it starts and ends
Mosquito months in Randall County
In a normal year mosquito season in Randall County, TX starts around April 3 and ends around November 3, about 31 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Randall County, and when
- Start tipping out standing water weekly by March 20.
- Book any yard treatment for early April, ahead of the July peak.
- Repellent can go away after November 3.
- 31 West Nile cases since 2016: you should wear EPA-registered repellent at dusk June to September, and check TX spray notices.
Randall County against the rest of TX
Randall County has the 239th longest season of 254 TX counties, at 214 days against 365 in Cameron County and 191 in Lipscomb County. Its mean temperature is 58.3°F.
- Gray County: April 4 to November 5 (215 days, 2 WNV)
- Donley County: April 3 to November 3 (214 days, 1 WNV)
- Deaf Smith County: April 5 to November 4 (213 days, 5 WNV)
- Hemphill County: April 5 to November 3 (212 days, 2 WNV)
West Nile in Randall County
From 1999 to 2025, CDC ArboNET counted 146 human West Nile cases in Randall County (78 neuroinvasive) across 20 years. The worst was 2003 with 44; the latest was 2025.
Background: reading the West Nile counts; how the dates are worked out.