Mosquito season in Jones County, IA: when it starts and ends
Mosquito months in Jones County
In a normal year mosquito season in Jones County, IA starts around April 21 and ends around October 15, about 25 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Jones County, and when
- Start tipping out standing water weekly by April 7.
- Book any yard treatment for late April, ahead of the July peak.
- Repellent can go away after October 15.
- 1 West Nile case since 2016 (last 2024): you should use repellent at dusk July to August, more so if over 60.
Jones County against the rest of IA
Jones County has the 52nd longest season of 99 IA counties, at 178 days against 198 in Des Moines County and 160 in Worth County. Its mean temperature is 47.6°F.
- Madison County: April 20 to October 15 (178 days, 0 WNV)
- Woodbury County: April 20 to October 15 (178 days, 18 WNV)
- Palo Alto County: April 21 to October 16 (178 days, 1 WNV)
- Tama County: April 21 to October 16 (178 days, 3 WNV)
West Nile in Jones County
From 1999 to 2025, CDC ArboNET counted 3 human West Nile cases in Jones County (1 neuroinvasive) across 3 years. The worst was 2024 with 1; the latest was 2024.
Background: when the season starts across the US; how the dates are worked out.