Mosquito season in Emery County, UT: when it starts and ends
Mosquito months in Emery County
In a normal year mosquito season in Emery County, UT starts around May 4 and ends around October 5, about 22 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Emery County, and when
- Start tipping out standing water weekly by April 20.
- Book any yard treatment for early May, ahead of the July peak.
- Repellent can go away after October 5.
- 1 West Nile case since 2016 (last 2024): you should use repellent at dusk July to August, more so if over 60.
Emery County against the rest of UT
Emery County has the 17th longest season of 29 UT counties, at 154 days against 210 in Salt Lake County and 82 in Summit County. Its mean temperature is 49.3°F.
- Juab County: May 2 to October 9 (160 days, 0 WNV)
- Weber County: May 5 to October 7 (155 days, 15 WNV)
- Millard County: May 7 to October 5 (151 days, 1 WNV)
- Daggett County: May 10 to October 3 (146 days, 0 WNV)
West Nile in Emery County
From 1999 to 2025, CDC ArboNET counted 1 human West Nile case in Emery County (1 neuroinvasive) across 1 year. The worst was 2024 with 1; the latest was 2024.
Background: when the season starts across the US; how the dates are worked out.