Mosquito season in Mineral County, CO: when it starts and ends

Mosquito months in Mineral County

In a normal year mosquito season in Mineral County, CO starts around June 10 and ends around September 16, about 14 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 Mineral County, and when

• Start tipping out standing water weekly by May 27.
• Book any yard treatment for early June, ahead of the July peak.
• Repellent can go away after September 16.
• No West Nile cases since 2016, so bites in Mineral County are a nuisance; check window screens.

Mineral County against the rest of CO

Mineral County has the 54th longest season of 64 CO counties, at 98 days against 200 in Mesa County and 69 in Summit County. Its mean temperature is 37°F.

• Grand County: June 4 to September 15 (102 days, 3 WNV)
• Clear Creek County: June 7 to September 14 (99 days, 2 WNV)
• Hinsdale County: June 8 to September 12 (96 days, 0 WNV)
• San Miguel County: June 15 to September 16 (93 days, 2 WNV)

West Nile in Mineral County

CDC ArboNET lists no human West Nile cases for Mineral County from 1999 to 2025.

More: how the dates are worked out · when mosquitoes go away for the winter.