Mosquito season in Saline County, KS: when it starts and ends
Mosquito months in Saline County
In a normal year mosquito season in Saline County, KS starts around April 7 and ends around October 31, about 30 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Saline County, and when
- Start tipping out standing water weekly by March 24.
- Book any yard treatment for early April, ahead of the July peak.
- Repellent can go away after October 31.
- 9 West Nile cases since 2016 (last 2025): you should use repellent at dusk June to September, more so if over 60.
Saline County against the rest of KS
Saline County has the 39th longest season of 105 KS counties, at 207 days against 227 in Cherokee County and 178 in Thomas County. Its mean temperature is 55.7°F.
- Atchison County: April 4 to October 29 (207 days, 2 WNV)
- Lyon County: April 5 to October 29 (207 days, 0 WNV)
- Wabaunsee County: April 6 to October 29 (206 days, 1 WNV)
- Jefferson County: April 7 to October 30 (206 days, 1 WNV)
West Nile in Saline County
From 1999 to 2025, CDC ArboNET counted 26 human West Nile cases in Saline County (16 neuroinvasive) across 12 years. The worst was 2003 with 7; the latest was 2025.
More: how the dates are worked out · reading the West Nile counts.