Mosquito season in Providence County, RI: when it starts and ends
Mosquito months in Providence County
In a normal year mosquito season in Providence County, RI starts around April 20 and ends around October 22, about 26 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Providence County, and when
- Start tipping out standing water weekly by April 6.
- Book any yard treatment for mid April, ahead of the July peak.
- Repellent can go away after October 22.
- 12 West Nile cases since 2016: you should wear EPA-registered repellent at dusk July to August, and check RI spray notices.
Providence County against the rest of RI
Providence County has the 4th longest season of 5 RI counties, at 185 days against 195 in Bristol County and 181 in Washington County. Its mean temperature is 50.2°F.
- Newport County: April 23 to October 31 (192 days, 4 WNV)
- Kent County: April 19 to October 22 (185 days, 0 WNV)
- Washington County: April 25 to October 23 (181 days, 1 WNV)
West Nile in Providence County
From 1999 to 2025, CDC ArboNET counted 22 human West Nile cases in Providence County (18 neuroinvasive) across 12 years. The worst was 2003 with 5; the latest was 2025.
See how the dates are worked out, and reading the West Nile counts.