39of 100

Today's score

Mosquitoes in Great Falls, MT

Cascade County

Moderate risk

Mosquitoes are out, mostly around dawn and dusk. Use repellent in the evening and tip out any standing water around the yard.

Updated July 19, 2026

Season
Ramping up
Water/wetland
5%
Top species
Asian tiger mosquito

Right now

Latest reading
66°
Temperature
52%
Humidity
0.5"
Recent rain

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Know the evening before Great Falls spikes.

7-day outlook

Risk recalculates daily from the local forecast.

Today
39
Mon
36
Tue
41
Wed
46
Thu
48
Fri
42
Sat
41

What's active right now

Floodwater and container mosquitoes are active and building toward the summer peak. Aedes vexans (the floodwater biter) surges about a week after heavy rain, and the Asian tiger mosquito is out biting during the day around homes. Early summer is when nuisance biting takes off.

Local mosquito habitat

Mosquitoes breed in standing water, so a town's risk tracks how much of that it holds. Great Falls is 0% wetland and marsh, 5% open water, and 37% developed across its 23.13 sq mi, home to about 60,422 people. That makes it the 2nd-wettest of the 6 towns in Cascade County. Marshes and floodplains breed the floodwater and cattail mosquitoes; developed areas breed the house mosquito in storm-drain catch basins and backyard containers.

The single biggest thing a homeowner controls is standing water: empty anything that holds it, keep gutters clear, and change bird baths weekly. A licensed mosquito service handles the breeding sites you can't reach and treats the shady resting spots where adults wait out the day.

Mosquito control in Great Falls, MT

Do I need mosquito control in Great Falls?

Mosquito activity in Great Falls is moderate today (39/100). Mosquitoes are out, especially at dawn and dusk and in shady, humid corners. A seasonal treatment plan keeps numbers down before peak weeks hit.

Professional mosquito control in Great Falls usually pairs a barrier treatment, misted onto shrubs, tall grass, and shady borders where adults rest, with larval control that targets standing water and catch basins so new broods never hatch. Treatments are typically applied every three to four weeks through the season by a licensed company.

How much does mosquito control cost in Great Falls?

Most homeowners pay about $80 to $150 per visit for professional mosquito barrier spraying, or roughly $350 to $600 for a full season of treatments, depending on lot size and how much shade and standing water the property has. Quotes are free, so it costs nothing to get a real number for your yard.

Get a free mosquito control quote

From a vetted local mosquito control company serving Great Falls. No cost, no obligation.

Are mosquitoes bad in Great Falls right now?

Floodwater and container mosquitoes are active and building toward the summer peak. In Great Falls, today's mosquito risk reads moderate (39/100). Mosquitoes are out, mostly around dawn and dusk. Use repellent in the evening and tip out any standing water around the yard.

Nearby towns

Mosquito pressure is local. Check the towns around you.