What You Need to Know About Mosquitoes in Colorado 2025

Mosquito season in Colorado is more than a nuisance; it has become a public health concern. In recent years, data from around the state indicates mosquito-borne illnesses are on the rise, emphasizing the need for awareness and prevention.

What does the 2025 mosquito season look like in Grand Junction, Colorado, and what practical tips can your family use to stay protected this summer?

What’s New in 2025: Mosquito Trends

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West Nile Virus has already been reported in Arapahoe County for 2025, which could mean a rough mosquito season ahead for our state.

In Mesa County, Colorado, officials have identified evidence of Aedes aegypti, a mosquito species known for transmitting diseases like yellow fever and dengue.

If new mosquito species are identified in the state this summer, it could mean even higher disease transmission rates.

Resources for Western Colorado

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Thankfully, one of Colorado's best resources for mosquito surveillance is here in Grand Junction. The Grand River Mosquito Control District tracks mosquito populations and control measures in Mesa County that you can follow at GRMCD.ORG.

Vector Disease Control International oversees state-wide mosquito control, including spraying for adult mosquitoes. Early this season, VDCI is already active in Boulder and Grand Counties.

The Centers for Disease Control gets the job of tracking West Nile in Colorado and throughout the country. Their complete 2024 data is found here.

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Prevention Tips: Protecting Yourself

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Repellents: Protect your family from mosquitoes with EPA-approved repellents that use DEET, picaridin, or oil of lemon eucalyptus.

Clothing: When mosquitoes are active, wear long-sleeved shirts and jeans to protect yourself. Mosquitoes are especially vicious on the Grand Mesa in May, June, and July.

Home and Yard Maintenance: Flower pots, birdbaths, and gutters are all places mosquitoes love to breed. Make sure these areas are cleaned and kept dry.

Report Issues: See standing water in your community or notice a severe mosquito infestation in a particular area? Notify Mesa County Public Health by calling 970-248-6900.

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LOOK: The Colors and Scents Mosquitos Love and Hate

Avoid being eaten alive by mosquitos this summer by giving yourself a fighting chance with these DIY repellents you can use today. Please scroll through the gallery below to find out what colors attract these little blood-suckers, which colors they ignore, and what kinds of scents will keep them away all day.

Gallery Credit: Wesley Adams

MORE: 7 Invasive Insects in Colorado You Should Kill Immediately If You See Them

Check out the 7 most invasive insects found in Colorado. Many feel these insects should be exterminated on site. Find out what they are, and which parts of Colorado's habitat they are attacking the most.

Gallery Credit: Wes Adams

NEXT: 10 of the Weirdest Insects You'll See in Colorado

What's the weirdest bug you have ever seen in Colorado? Did it stink? Did it bite? We're checking out ten of Colorado's weirdest insects that you may encounter outside this summer. Keep going to see the weirdest insects that call Colorado home.

Gallery Credit: Wesley Adams