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

Mosquito months in Guadalupe County

In a normal year mosquito season in Guadalupe County, NM starts around April 4 and ends around November 1, about 30 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 Guadalupe County, and when

• Start tipping out standing water weekly by March 21.
• Book any yard treatment for early April, ahead of the July peak.
• Repellent can go away after November 1.
• 1 West Nile case since 2016 (last 2021): you should use repellent at dusk June to August, more so if over 60.

Guadalupe County against the rest of NM

Guadalupe County has the 13th longest season of 33 NM counties, at 211 days against 268 in Doña Ana County and 114 in Catron County. Its mean temperature is 58.1°F.

• Quay County: April 4 to November 4 (214 days, 6 WNV)
• Grant County: April 6 to November 4 (212 days, 0 WNV)
• Roosevelt County: April 7 to November 1 (208 days, 3 WNV)
• Curry County: April 8 to November 2 (208 days, 3 WNV)

West Nile in Guadalupe County

From 1999 to 2025, CDC ArboNET counted 2 human West Nile cases in Guadalupe County (1 neuroinvasive) across 2 years. The worst was 2021 with 1; the latest was 2021.

See how the dates are worked out, and when the season starts across the US.