Mosquito season in Phillips County, KS: when it starts and ends
Mosquito months in Phillips County
In a normal year mosquito season in Phillips County, KS starts around April 15 and ends around October 23, about 27 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Phillips County, and when
- Start tipping out standing water weekly by April 1.
- Book any yard treatment for mid April, ahead of the July peak.
- Repellent can go away after October 23.
- 1 West Nile case since 2016 (last 2018): you should use repellent at dusk June to August, more so if over 60.
Phillips County against the rest of KS
Phillips County has the 83rd longest season of 105 KS counties, at 191 days against 227 in Cherokee County and 178 in Thomas County. Its mean temperature is 53.1°F.
- Washington County: April 14 to October 23 (192 days, 2 WNV)
- Marshall County: April 14 to October 22 (191 days, 2 WNV)
- Grant County: April 16 to October 24 (191 days, 5 WNV)
- Finney County: April 17 to October 25 (191 days, 7 WNV)
West Nile in Phillips County
From 1999 to 2025, CDC ArboNET counted 8 human West Nile cases in Phillips County (4 neuroinvasive) across 7 years. The worst was 2013 with 2; the latest was 2018.
More: how the dates are worked out · when the season starts across the US.