Mosquito season in Hemphill County, TX: when it starts and ends
Mosquito months in Hemphill County
In a normal year mosquito season in Hemphill County, TX starts around April 5 and ends around November 3, about 30 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Hemphill County, and when
- Start tipping out standing water weekly by March 22.
- Book any yard treatment for early April, ahead of the July peak.
- Repellent can go away after November 3.
- 2 West Nile cases since 2016 (last 2023): you should use repellent at dusk June to September, more so if over 60.
Hemphill County against the rest of TX
Hemphill County has the 241st longest season of 254 TX counties, at 212 days against 365 in Cameron County and 191 in Lipscomb County. Its mean temperature is 57.4°F.
- Randall County: April 3 to November 3 (214 days, 31 WNV)
- Deaf Smith County: April 5 to November 4 (213 days, 5 WNV)
- Roberts County: April 5 to November 3 (212 days, 1 WNV)
- Oldham County: April 7 to November 3 (210 days, 0 WNV)
West Nile in Hemphill County
From 1999 to 2025, CDC ArboNET counted 6 human West Nile cases in Hemphill County (2 neuroinvasive) across 5 years. The worst was 2023 with 2; the latest was 2023.
Background: when the season starts across the US; how the dates are worked out.