Mosquito season in Chickasaw County, MS: when it starts and ends
Mosquito months in Chickasaw County
In a normal year mosquito season in Chickasaw County, MS starts around March 12 and ends around November 14, about 35 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Chickasaw County, and when
- Start tipping out standing water weekly by February 26.
- Book any yard treatment for mid March, ahead of the July peak.
- Repellent can go away after November 14.
- 2 West Nile cases since 2016 (last 2025): you should use repellent at dusk May to September, more so if over 60.
Chickasaw County against the rest of MS
Chickasaw County has the 66th longest season of 82 MS counties, at 247 days against 333 in Harrison County and 221 in Tishomingo County. Its mean temperature is 62.3°F.
- Smith County: March 12 to November 15 (248 days, 1 WNV)
- DeSoto County: March 13 to November 16 (248 days, 6 WNV)
- Monroe County: March 14 to November 15 (246 days, 5 WNV)
- Choctaw County: March 16 to November 16 (245 days, 0 WNV)
West Nile in Chickasaw County
From 1999 to 2025, CDC ArboNET counted 4 human West Nile cases in Chickasaw County (3 neuroinvasive) across 4 years. The worst was 2025 with 1; the latest was 2025.
More: how the dates are worked out · when mosquitoes go away for the winter.