Mosquito season in Greene County, MO: when it starts and ends
Mosquito months in Greene County
In a normal year mosquito season in Greene County, MO starts around March 30 and ends around November 4, about 31 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Greene County, and when
- Start tipping out standing water weekly by March 16.
- Book any yard treatment for late March, ahead of the July peak.
- Repellent can go away after November 4.
- 8 West Nile cases since 2016 (last 2025): you should use repellent at dusk June to September, more so if over 60.
Greene County against the rest of MO
Greene County has the 29th longest season of 115 MO counties, at 219 days against 242 in Pemiscot County and 187 in Crawford County. Its mean temperature is 57.1°F.
- Texas County: March 29 to November 3 (219 days, 1 WNV)
- Benton County: March 30 to November 4 (219 days, 0 WNV)
- Cole County: March 29 to November 3 (218 days, 0 WNV)
- Barton County: March 31 to November 4 (218 days, 0 WNV)
West Nile in Greene County
From 1999 to 2025, CDC ArboNET counted 12 human West Nile cases in Greene County (9 neuroinvasive) across 8 years. The worst was 2023 with 3; the latest was 2025.
More: how the dates are worked out · reading the West Nile counts.