Mosquito season in McKinley County, NM: when it starts and ends

Mosquito months in McKinley County

In a normal year mosquito season in McKinley County, NM starts around May 15 and ends around October 3, about 20 weeks.

1. Jan
2. Feb
3. Mar
4. Apr
5. May
6. Jun
7. Jul
8. Aug
9. Sep
10. Oct
11. Nov
12. Dec

What to do in McKinley County, and when

• Start tipping out standing water weekly by May 1.
• Book any yard treatment for mid May, ahead of the July peak.
• Repellent can go away after October 3.
• 3 West Nile cases since 2016 (last 2024): you should use repellent at dusk July, more so if over 60.

McKinley County against the rest of NM

McKinley County has the 29th longest season of 33 NM counties, at 141 days against 268 in Doña Ana County and 114 in Catron County. Its mean temperature is 48.7°F.

• San Miguel County: May 10 to October 7 (150 days, 4 WNV)
• Mora County: May 11 to October 3 (145 days, 1 WNV)
• Taos County: May 18 to October 3 (138 days, 14 WNV)
• Cibola County: May 20 to October 4 (137 days, 1 WNV)

West Nile in McKinley County

From 1999 to 2025, CDC ArboNET counted 9 human West Nile cases in McKinley County (7 neuroinvasive) across 6 years. The worst was 2004 with 3; the latest was 2024.

More: how the dates are worked out · when the season starts across the US.