Mosquito season in Roosevelt County, NM: when it starts and ends
Mosquito months in Roosevelt County
In a normal year mosquito season in Roosevelt County, NM starts around April 7 and ends around November 1, about 30 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Roosevelt County, and when
- Start tipping out standing water weekly by March 24.
- Book any yard treatment for early April, ahead of the July peak.
- Repellent can go away after November 1.
- 3 West Nile cases since 2016 (last 2021): you should use repellent at dusk June to September, more so if over 60.
Roosevelt County against the rest of NM
Roosevelt County has the 14th longest season of 33 NM counties, at 208 days against 268 in Doña Ana County and 114 in Catron County. Its mean temperature is 59.1°F.
- Grant County: April 6 to November 4 (212 days, 0 WNV)
- Guadalupe County: April 4 to November 1 (211 days, 1 WNV)
- Curry County: April 8 to November 2 (208 days, 3 WNV)
- Valencia County: April 8 to October 31 (206 days, 20 WNV)
West Nile in Roosevelt County
From 1999 to 2025, CDC ArboNET counted 20 human West Nile cases in Roosevelt County (10 neuroinvasive) across 11 years. The worst was 2003 with 5; the latest was 2021.
More: how the dates are worked out · when mosquitoes go away for the winter.