Mosquito season in Harvey County, KS: when it starts and ends
Mosquito months in Harvey County
In a normal year mosquito season in Harvey County, KS starts around April 4 and ends around November 2, about 30 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Harvey County, and when
- Start tipping out standing water weekly by March 21.
- Book any yard treatment for early April, ahead of the July peak.
- Repellent can go away after November 2.
- 1 West Nile case since 2016 (last 2018): you should use repellent at dusk June to September, more so if over 60.
Harvey County against the rest of KS
Harvey County has the 24th longest season of 105 KS counties, at 212 days against 227 in Cherokee County and 178 in Thomas County. Its mean temperature is 56.2°F.
- Barber County: April 2 to October 31 (212 days, 3 WNV)
- Cowley County: April 3 to November 1 (212 days, 3 WNV)
- Geary County: April 2 to October 30 (211 days, 0 WNV)
- Miami County: April 3 to October 31 (211 days, 1 WNV)
West Nile in Harvey County
From 1999 to 2025, CDC ArboNET counted 19 human West Nile cases in Harvey County (9 neuroinvasive) across 11 years. The worst was 2003 with 4; the latest was 2018.
See how the dates are worked out, and when the season starts across the US.