Mosquito season in Uintah County, UT: when it starts and ends
Mosquito months in Uintah County
In a normal year mosquito season in Uintah County, UT starts around April 19 and ends around October 13, about 25 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Uintah County, and when
- Start tipping out standing water weekly by April 5.
- Book any yard treatment for mid April, ahead of the July peak.
- Repellent can go away after October 13.
- 6 West Nile cases since 2016 (last 2023): you should use repellent at dusk July to August, more so if over 60.
Uintah County against the rest of UT
Uintah County has the 8th longest season of 29 UT counties, at 177 days against 210 in Salt Lake County and 82 in Summit County. Its mean temperature is 48°F.
- Garfield County: April 22 to October 20 (181 days, 0 WNV)
- Washington County: April 24 to October 22 (181 days, 9 WNV)
- San Juan County: April 24 to October 17 (176 days, 2 WNV)
- Carbon County: April 24 to October 15 (174 days, 0 WNV)
West Nile in Uintah County
From 1999 to 2025, CDC ArboNET counted 31 human West Nile cases in Uintah County (14 neuroinvasive) across 11 years. The worst was 2005 with 14; the latest was 2023.
More: how the dates are worked out · reading the West Nile counts.