Mosquito season in Chilton County, AL: when it starts and ends
Mosquito months in Chilton County
In a normal year mosquito season in Chilton County, AL starts around March 5 and ends around November 23, about 38 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Chilton County, and when
- Start tipping out standing water weekly by February 19.
- Book any yard treatment for early March, ahead of the July peak.
- Repellent can go away after November 23.
- 5 West Nile cases since 2016 (last 2025): you should use repellent at dusk May to September, more so if over 60.
Chilton County against the rest of AL
Chilton County has the 23rd longest season of 67 AL counties, at 263 days against 330 in Montgomery County and 218 in Marion County. Its mean temperature is 62.9°F.
- Wilcox County: March 3 to November 22 (264 days, 0 WNV)
- Marshall County: March 4 to November 23 (264 days, 0 WNV)
- Limestone County: March 6 to November 24 (263 days, 4 WNV)
- Perry County: March 3 to November 20 (262 days, 1 WNV)
West Nile in Chilton County
From 1999 to 2025, CDC ArboNET counted 5 human West Nile cases in Chilton County (5 neuroinvasive) across 3 years. The worst was 2017 with 3; the latest was 2025.
See how the dates are worked out, and reading the West Nile counts.