Mosquito season in Norton County, KS: when it starts and ends
Mosquito months in Norton County
In a normal year mosquito season in Norton County, KS starts around April 21 and ends around October 21, about 26 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Norton 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 21.
- 4 West Nile cases since 2016 (last 2024): you should use repellent at dusk June to August, more so if over 60.
Norton County against the rest of KS
Norton County has the 97th longest season of 105 KS counties, at 183 days against 227 in Cherokee County and 178 in Thomas County. Its mean temperature is 52.2°F.
- Logan County: April 20 to October 22 (185 days, 1 WNV)
- Decatur County: April 19 to October 20 (184 days, 1 WNV)
- Cheyenne County: April 20 to October 18 (181 days, 2 WNV)
- Hamilton County: April 21 to October 19 (181 days, 3 WNV)
West Nile in Norton County
From 1999 to 2025, CDC ArboNET counted 5 human West Nile cases in Norton County (0 neuroinvasive) across 4 years. The worst was 2024 with 2; the latest was 2024.
See how the dates are worked out, and reading the West Nile counts.